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Original Article

Association of Hand Grip Strength and Cardiometabolic Markers in Korean Adult Population: The Korea National Health and Nutrition Examination Survey 2015-2016

Korean Journal of Family Medicine 2020;41(5):291-298.
Published online: May 8, 2020

1Department of Family Medicine, Yonsei University College of Medicine, Seoul, Korea

2Department of Family Medicine, National Health Insurance Service Ilsan Hospital, Goyang, Korea

*Corresponding Author: Young Eun Choi Tel: +82-31-900-0114, Fax: +82-31-900-0149, E-mail: yechoi@nhimc.or.kr
• Received: August 1, 2018   • Revised: December 13, 2018   • Accepted: December 27, 2018

Copyright © 2020 The Korean Academy of Family Medicine

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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See commentary "Grip Strength as a Cardiometabolic Marker" in Volume 41 on page 271.
  • Background
    Muscle strength has been suggested as a cardiovascular marker. The aim of this study was to examine the associations between hand grip strength and biomarkers of cardiovascular disease in the Korean population.
  • Methods
    A total of 9,083 participants aged 20–80 years from Korea National Health and Nutrition Examination Survey 2015–2016 were investigated.
  • Results
    Among men, both relative and dominant hand grip strength showed a positive association with diastolic blood pressure in those aged 65–80 years (95% confidence interval, P-value of dominant and relative hand grip strength: β=0.06, 0.01; P<0.05). Among women, relative and dominant hand grip strength showed a positive relationship to diastolic blood pressure in those aged 20–64 years (β=0.06, 0.01; P<0.001). Body mass index was positively associated with dominant hand grip strength in younger women (β=0.18, P<0.05), whereas it was positively associated with relative hand grip strength in all sex and age groups. High-sensitivity C-reactive protein showed a negative association with relative and dominant hand grip strength in all women, although the same association was observed only in younger men. Diabetes was inversely related to hand grip strength in younger women and men.
  • Conclusion
    Increased hand grip strength may be associated with lower C-reactive protein in women and with less risk of diabetes in the Korean adult population. Further prospective studies are needed for the determination of causality between cardiometabolic markers and hand grip strength.
Hand grip strength (HGS) is a parameter used in diagnosing sarcopenia. Sarcopenia has been proven to be closely linked to future disability, frailty, metabolic syndrome [1], diabetes mellitus [2], and mortality [3]. Muscle strength is an important parameter in predicting health, and HGS is considered a representative marker of muscle strength [4].
Some studies have shown a link between HGS and inflammatory markers closely related to cardiovascular diseases [1,5]. High levels of high-sensitivity C-reactive protein (hsCRP) have been suggested to be related to low HGS [6,7]. In a study in US adults in 2016, higher relative HGS was significantly associated with lower systolic blood pressure, glucose, plasma insulin, and triglycerides, and with higher high-density lipoprotein (HDL) cholesterol [8]. In one recent study, HGS showed only a moderate relationship to cardiovascular markers [4]. This result may be attributed to the use of dominant HGS. A study in Taiwan showed significant associations between relative HGS and favorable cardiometabolic risk factors such as blood pressure, triglyceride, total cholesterol-to-HDL ratio, uric acid, hemoglobin A1C (HbA1C), and Framingham score in men, and fasting glucose, HbA1C, HDL, and log hsCRP in women [9]. Another study in China also showed a relationship between higher relative HGS and favorable blood lipid profile and lower dyslipidemia risk in both men and women, whereas higher absolute HGS was associated with unfavorable metabolic profiles and higher metabolic disease risk [10].
Several studies on the Korean population have evaluated muscle strength by measuring HGS. In one study, sarcopenia was reported to be related to cardiovascular disease independent of other cardiovascular risk factors in elderly Korean adults [11]. Another study showed a negative association between metabolic syndrome and HGS divided by body weight only in elderly Korean men, with a stronger effect in those aged >65 years [12]. A cross-sectional study showed an inverse relationship between metabolic syndrome and relative HGS in adults [13]. A recent Korean study demonstrated a relationship between low HGS and decreased quality of life in the adult population [14]. In a study using data from the Korea National Health and Nutrition Examination Survey (KNHANES) 2014–2015, a multivariate logistic regression analysis of 8,208 participants showed that HGS was inversely associated with type 2 diabetes. The study also found that hsCRP mediated approximately 10% of the association between HGS and type 2 diabetes mellitus [15]. In this study, sex and old age were analyzed together despite a significantly different HGS between male and female participants (mean HGS, 39.67; 95% confidence interval [CI], 39.32–40.02 for men and mean HGS, 23.70; 95% CI, 23.48–23.91 for women aged between 19 and 80 years). Men and women are physiologically different, and HGS is two times higher in men than in women. Further, people become weaker with age. Therefore, we wanted to determine the differences among different sex and age groups. To our knowledge, no study has assessed the direct relationship between HGS and cardiometabolic markers in stratified age and sex groups. The purpose of this study was to examine the associations between types of HGS and biomarkers of cardiovascular disease risk, including blood pressure, serum lipids, fasting plasma glucose, and hsCRP in the Korean adult population. Further, we aimed to examine the relationship between HGS and metabolic diseases including diabetes mellitus and dyslipidemia.
1. Participants
Data were collected from KNHANES 2015–2016. KNHANES is a nationwide population-based cross-sectional survey that consists of health interviews, health examinations, and nutritional surveys. Data from January 1, 2015, to December 31, 2016, were collected. Of a total of 15,530 participants, those aged 20–80 years (n=12,170) were included in this study. Participants with missing data on HGS, laboratory tests, or blood pressure were excluded. Participants were also excluded if they presented any of the following conditions: pain or stiffness in the last 7 days; fracture or injury of the hands, fingers, or arms; paralysis of the hands; any cast or bandages applied on the hands and wrists; and any surgery in the last 3 months. Finally, a total of 9,083 participants were included in the analysis. Data were analyzed with a weighted ratio of 1:1 and a weighted total number of participants of 32,116,183.
2. Ethics Statement
Individual patient consent was waived since this study was a retrospective analysis. The study was performed in agreement with the Declaration of Helsinki [16].
3. Health Examination Survey
A self-administered questionnaire with health examination items was individually completed by the participants, and collected to obtain information on age, sex, physical activity, and smoking and drinking status. Participants who were currently smoking and had smoked >100 cigarettes in their lifetime were considered smokers. Participants who had consumed more than one glass of alcohol in the recent year were considered drinkers. Activity levels were examined in minutes per day, by summing the durations of moderate to vigorous physical activities spent in work and leisure. The participants were asked to report if they had been diagnosed with diabetes and dyslipidemia, and if they had been treated for these diseases.
4. Definition of Hand Grip Strength
Dominant HGS was defined as the grip strength of the dominant hand measured in kilograms [17]. Absolute HGS was defined as the sum of the largest readings for both hands. Relative HGS was defined as absolute HGS divided by body mass index (BMI) [18].
5. Measurement of Hand Grip Strength
HGS was measured using a digital hand dynamometer (T.K.K 5401 digital grip strength dynamometer; Takei Scientific Instruments Co. Ltd., Tokyo, Japan). Measurement was performed according to the Southampton protocol for adult grip strength measurement, as follows [17]: in a sitting position with a neutral position of the forearms rested on the arms of a chair. HGS was measured three times for both hands, and the maximum strength was selected for the analysis. A rest interval of at least 30 seconds was provided between measurements. If dominancy was not mentioned, the right hand was considered the dominant hand.
6. Other Data
Anthropometric measures including height, weight, and waist circumference were collected using a standardized procedure. BMI was calculated as weight (kg) divided by height squared (m2). Cardiometabolic markers such as fasting glucose, HbA1C, systolic blood pressure, diastolic blood pressure, total cholesterol, triglyceride, HDL, low-density lipoprotein (LDL), and hsCRP were measured.
7. Definition of Cardiometabolic Disease
Participants with a fasting plasma glucose level of ≥126 mg/dL or with antidiabetic treatment were categorized into the diabetes group according to the definition of the American Diabetes Association [19]. Participants using lipid-lowering drugs were categorized into the dyslipidemia group, along with those with at least one of the following lipid profiles: total cholesterol ≥200 mg/dL, LDL ≥130 mg/dL, and triglyceride ≥150 mg/dL, in accordance with the definition in the guidelines of the American Association of Clinical Endocrinologists and American College of Endocrinology.
8. Statistical Analysis
To verify the characteristics of the participants, we presented the frequency of categorical variables and the weighted percentage. The RaoScott chi-square test was performed for categorical variables. Continuous variables were analyzed with t-test or analysis of variance, and presented as means and standard errors (SEs).
To examine multicollinearity, the variance inflation factor was calculated. To handle the problem of multicollinearity, we eliminated variables with a variance inflation factor of >10. Age-adjusted univariate linear regression analysis was performed to examine the association between HGS and cardiometabolic variables. Multivariate linear regression analysis was conducted thereafter, with adjustment for age, smoking status, and drinking status.
As men and women had significantly different mean values for several characteristics, we stratified the participants by sex. To examine the difference in older age, we also stratified the participants by age (20–64 and 65–80 years). All analyses were conducted using the statistical package IBM SPSS ver. 23.0 for Windows (IBM Corp., Armonk, NY, USA). Statistical significance was considered at P<0.05. Analysis was performed using a complex sample design.
1. Characteristics of the Participants
The data of 9,083 participants were analyzed. The mean age of the participants was 46.24±0.28 years. The mean values and SEs for cardiometabolic outcomes, grip strength, and BMI according to sex are shown in Table 1. The mean absolute HGS was 81.69±0.33 in men and 48.28±0.20 in women. The relative HGS was 3.37±0.01 in men and 2.11±0.01 in women. Men showed higher BMI, higher waist circumference, longer physical activity duration, and higher systolic and diastolic blood pressure. With respect to biomarker outcomes, men showed higher triglyceride, lower HDL, lower LDL, higher fasting plasma glucose, higher HbA1C, and higher CRP levels. More men than women had diabetes and dyslipidemia (diabetes 10.8% versus 8.6%, dyslipidemia 64% versus 56.0%; P<0.001) (Table 1). Men tended to smoke and drink more than women (smokers 37.6% versus 5.4%, drinkers 75.2% versus 44.7%; P<0.001).
2. Linear Regression Analysis
Age-adjusted univariate regression analysis was performed to examine the association between HGS and age- and sex-stratified variables. To optimize multicollinearity, we eliminated total cholesterol, which had a variance inflation factor of >10, from regression analysis. The results of univariate and multivariate regression analyses are shown in Tables 2 and 3, respectively.
In male participants aged 20–64 years, dominant HGS showed a positive relationship to BMI and physical activity. Relative HGS was positively associated with BMI and physical activity. Both relative and dominant HGS showed a negative association with hsCRP and diabetes.
In male participants aged 65–80 years, dominant HGS showed a positive correlation with HDL. Relative HGS showed a negative correlation with BMI. Both dominant and relative HGS were positively associated with diastolic blood pressure. Physical activity duration showed a positive relationship to HGS in men, regardless of age group or HGS type.
In female participants aged 20–64 years, dominant HGS showed a significantly positive correlation with BMI and waist circumference, whereas it showed a negative relation to systolic blood pressure. Relative HGS showed a significantly positive correlation with systolic blood pressure and LDL, whereas it was negatively associated with BMI. In both HGS groups, hsCRP and diabetes showed a negative correlation with HGS. Triglyceride, diastolic blood pressure, and physical activity duration showed a positive correlation with HGS.
In female participants aged 65–80 years, dominant HGS showed a significantly negative correlation with diabetes. Relative HGS was inversely associated with BMI. hsCRP showed a significantly negative association with HGS in both grip strength groups. Dyslipidemia did not show any significant association with HGS.
For many years, researchers have studied the importance of sarcopenia and its relation to health and aging. In this study, we examined the associations between HGS and cardiometabolic markers in the Korean adult population. Our results showed that HGS is inversely associated with hsCRP in women and younger men, and is inversely related to diabetes in the younger group.
1. Grip Strength and Obesity
In this study, dominant HGS showed a positive association with BMI in men and women aged 20–64 years, which was consistent with the result of a previous study [4], whereas relative HGS showed a negative association with BMI in all sex and age groups. Relative HGS refers to absolute HGS divided by BMI. Larger muscle mass could contribute to larger BMI, which could decrease the relative HGS. This seems to be a mathematical phenomenon.
In a cross-sectional study of strength index, body weight was similar among strength quintiles, although an inverse relationship was observed between muscular strength and the prevalence and incidence of excessive body fat and excessive abdominal fat [20]. Another study on associations between resistance training and body composition showed that resistance training seems to have positive effects on body composition without significant effects on weight decrease [21]. People aged 20–64 years tend to maintain physical activity and muscle mass compared with older people. Active physical movements could maintain the lean body mass, which could decrease the percentage body fat but not the total fat mass or absolute body weight.
2. Grip Strength and Blood Pressure
In our study, higher relative and absolute HGS values were negatively related to systolic blood pressure in women aged 20–64 years. Higher diastolic blood pressure showed a positive association with relative HGS in men and younger women aged 20–64 years. Several studies showed conflicting results with respect to blood pressure and HGS.
In one cross-sectional study assessing the association between HGS and blood pressure in middle-aged (mean, 63.2±6.6 years) and oldest old (age ≥85 years) participants, HGS was positively associated with systolic blood pressure only in the oldest old group, whereas there was no significant association in the middle-aged group. The results suggested that higher blood pressure is positively associated with better muscle strength in old age [22]. In a Chinese study on adolescents aged 13–17 years, increased BMI was associated with high blood pressure and low HGS. However, after adjustment for BMI, high HGS showed a positive relationship to blood pressure [23]. These two studies showed different results from those of the present study owing to the analysis of different age groups.
In another study including 4,846 participants older than 60 years, participants with sarcopenia had a higher prevalence of hypertension than those without sarcopenia. A strong association between hypertension and sarcopenia was observed in patients with diabetes mellitus. A total of 876 patients (18.1%) with diabetes and 3,970 patients (81.9%) without diabetes were included [24]. This study included a higher number of healthy participants than that in our study. Our study included 32.3% participants with impaired fasting glucose. To confirm the relationship between blood pressure and muscle mass, further studies adjusting for diabetes are needed.
3. Grip Strength and Inflammation (High-Sensitivity C-Reactive Protein)
Previous studies have shown that hsCRP is related to cardiovascular diseases [25,26]. Schaap et al. [27] showed that higher levels of interleukin-6 and hsCRP are related to a high risk of muscle strength loss. This study showed negative associations of hsCRP with relative HGS in younger men and in all women, consistent with previous studies. A Japanese study reported that hsCRP is inversely associated with HGS in the elderly [6]. Another cross-sectional study on older populations from several countries showed similar results in univariate analysis. After adjustment for socioeconomic factors and health behaviors, the significant association disappeared [7]. Further studies are needed to discuss the discrepancy of our results with previous results in older men.
No strong associations were found between HGS and lipid profile. The results were partly consistent with those of a previous cross-sectional studies [5,8].
4. Grip Strength and Diabetes
In our study, diabetes was inversely related to both types of HGS in younger participants of both sexes. The results were consistent with those of a study on six ethnic groups, which found an inverse relationship between HGS and the prevalence of type 2 diabetes mellitus, regardless of grip strength differences [28]. In another study from China, the third and fourth quartiles of relative HGS were negatively related to impaired fasting glucose in male adults [10]. Conversely, the risk of type 2 diabetes mellitus did not show an association with grip strength in participants aged 50–75 years in a prospective cohort study [29]. A study using data from KNHANES 2014–2015 reported that HGS is inversely associated with fasting glucose, HbA1C, fasting insulin, and some calculated levels [{fasting glucose (mg/dL)×fasting insulin (mIU/L)}/40]. The percentage mediation effect of hsCRP ranged from 8% to 11% [15]. This previous study showed some differences from our study despite similarly using data from KNHANES. First, our study used more recent data from 2015 to 2016. Second, the previous authors did not stratify the participants according to sex and age, despite the different HGS between the sexes (mean HGS, 39.67; 95% CI, 39.32–40.02 and mean HGS, 23.70; 95% CI, 23.48–23.91 for men and women aged between 19 and 80 years, respectively). We divided the participants into groups according to sex and age, and different outcomes were obtained among them. Third, Lee et al. [15] employed the protocol of the American Society of Hand Therapists to measure HGS, which uses the mean HGS from three trials. On the contrary, our study employed the Southampton protocol, which uses the maximal grip score from three trials. Grip strength measurements could be affected by the protocol used. After multiple attempts, strength could become lower and the maximum grip strength may be greater than the mean value obtained after three trials. Therefore, we used the Southampton protocol to measure HGS according to the suggestion by Roberts et al. [17] Fourth, our study included blood pressure and dyslipidemia, which were not included in a study of Lee et al. [15] Our analysis showed that blood pressure and lipid profile were also associated with HGS in some groups (Table 3). In the future, studies including grip strength stratification and older-aged participants may be necessary.
Our study had some strengths. First, this study evaluated the relationship of HGS to variable cardiovascular markers using data from a well-conducted nationally representative survey in South Korea. Second, to our knowledge, this study is the first to assess the association between two kinds of HGS, relative and dominant, and cardiometabolic outcomes in stratified sex and age groups in the Korean adult population. Our study revealed that HGS has negative a relationship to BMI, hsCRP, and diabetes, and a positive relationship to physical activity in both sexes in younger age. However, those relationships were reduced to nonsignificance after old age, in which the associations between dominant HGS and BMI, relative HGS and hsCRP, and relative HGS and diabetes disappeared in both sexes. Unlike in men, HGS in young women showed some association with waist circumference, systolic blood pressure, diastolic blood pressure, and triglyceride level. However, those associations also disappeared in the analysis of old age.
5. Grip Strength and Dyslipidemia
In univariate linear regression, dominant HGS showed a significant positive association with dyslipidemia in men and older women aged 65–80 years. Relative HGS was positively associated with dyslipidemia in younger men and negatively associated with dyslipidemia in younger women. Our results were consistent with those from a recent study in China, in which only relative HGS in the higher quartiles was related to less risk of dyslipidemia and hyperlipidemia [10]. However, after multivariate adjustment in our study, these associations became insignificant. In one previous study, HGS showed moderate associations with lipid profiles and other cardiometabolic factors [4]. Further longitudinal studies would be needed to explore the role of HGS in dyslipidemia.
6. Limitations
Our study had several limitations. First, as this study had a cross-sectional design, the existence of a causal relationship between HGS and cardiometabolic markers could not be confirmed. Second, the analysis did not include variables of smoking, alcohol drinking, education, and other socioeconomic factors and health issues. Lastly, fat mass or muscle mass measurements for body composition were missing in this study.
Relative HGS has recently been suggested as a cardiometabolic predictor of muscle strength, showing a stronger association with cardiovascular disease markers than dominant HGS [8,9]. In our study, the relative HGS did not show a stronger association with CRP, blood pressure, BMI, and physical activity duration than absolute HGS. However, relative HGS showed a positive association with HDL in men aged 20–64 years, whereas there was no such relationship for absolute HGS. This may be due to the minimization of the effect of body composition. Further studies are needed to estimate the compared odds ratios and relative risks.
7.Conclusion
Our study showed that increased HGS is associated with lower hsCRP in women and younger men, and is related to a lower prevalence of diabetes in younger people. HGS is a quick and simple method of measuring muscle strength. This suggests that HGS may be an effective screening tool for cardiometabolic disease. Further studies, including prospective cohort studies, may be needed in the older and adolescent populations.

No potential conflict of interest relevant to this article was reported.

Table 1.
Comparison of demographics between male and female participants
Characteristic Sex
Total P-value
Male Female
No. of participants 4,062 (51.0) 5,021 (49.0) 9,083 (100.0)
Age (y) 45.62±0.32 46.89±0.34 46.24±0.28 <0.001
BMI (kg/m2) 24.53±0.07 23.31±0.07 23.93±0.05 <0.001
Waist circumference (cm) 86.28±0.18 78.94±0.20 82.68±0.14 <0.001
Systolic blood pressure (mm Hg) 120.09±0.29 114.54±0.32 117.37±0.24 <0.001
Diastolic blood pressure (mm Hg) 78.30±0.21 73.22±0.18 75.81±0.15 <0.001
Total cholesterol (mg/dL) 191.94±0.66 193.12±0.57 192.52±0.47 0.151
Triglycerides (mg/dL) 168.26±3.33 113.96±1.37 141.66±1.91 <0.001
High-density lipoprotein (mg/dL) 47.47±0.22 55.14±0.23 51.23±0.17 <0.001
Low-density lipoprotein (mg/dL) 112.98±0.60 115.48±0.50 114.20±0.43 <0.001
Fasting glucose (mg/dL) 102.02±0.48 97.18±0.40 99.65±0.33 <0.001
Hemoglobin A1c (%) 5.66±0.02 5.59±0.01 5.63±0.01 <0.001
High-sensitivity C-reactive protein (mg/L) 1.32±0.04 1.11±0.03 1.21±0.03 <0.001
Physical activity (min/wk) 45.85±2.12 21.81±0.97 34.08±1.24 <0.001
Dominant hand grip strength (kg) 41.83±0.18 24.91±0.11 33.54±0.15 <0.001
Absolute hand grip strength (kg) 81.69±0.33 48.28±0.20 65.32±0.28 <0.001
Relative hand grip strength (kg/BMI)* 3.37±0.01 2.11±0.01 2.75±0.01 <0.001
Diabetes 582 (10.8) 505 (8.6) 1,087 (9.7) <0.001
Dyslipidemia 2,624 (64.1) 2,999 (56.0) 5,623 (60.1) <0.001
Smoking 1,390 (37.6) 238 (5.4) 1,628 (21.8) <0.001
Drinking 2,937 (75.2) 2,072 (44.7) 5,009 (60.3) <0.001

Values are presented as unweighted number (weighted %) for categorical variables or mean±standard error for continuous variables. P-values are from the Rao-Scott χ² test or t-test.

BMI, body mass index.

*Relative hand grip strength is defined as absolute hand grip strength divided by BMI.

Table 2.
Results from univariate linear regression analysis on the associations of relative handgrip strength (strength/BMI) and dominant handgrip strength (kg) with cardiometabolic markers
Predictor Men
Women
Aged 20–64 y
Aged 65–80 y
Aged 20–64 y
Aged 65–80 y
β (95% CI) P-value β (95% CI) P-value β (95% CI) P-value β (95% CI) P-value
Dominant hand grip strength (kg)
 Age (y) -0.07 (-0.09 to -0.04) <0.001 -0.61 (-0.70 to -0.53) <0.001 -0.02 (-0.04 to -0.01) 0.003 -0.37 (-0.43 to -0.31) <0.001
 BMI (kg/m2) 0.48 (0.39 to 0.57) <0.001 0.49 (0.32 to 0.65) <0.001 0.23 (0.17 to 0.28) <0.001 0.15 (0.04 to 0.25) 0.005
 WC (cm) 0.14 (0.10 to 0.17) <0.001 0.13 (0.08 to 0.19) <0.001 0.08 (0.06 to 0.10) <0.001 0.03 (-0.01 to 0.07) 0.151
 SBP (mm Hg) 0.03 (0.01 to 0.05) 0.004 0.01 (-0.02 to 0.04) 0.591 0.01 (0.00 to 0.02) 0.251 0.00 (-0.02 to 0.02) 0.890
 DBP (mm Hg) 0.06 (0.03 to 0.09) <0.001 0.15 (0.11 to 0.20) <0.001 0.03 (0.02 to 0.05) <0.001 0.05 (0.02 to 0.08) 0.002
 TG (mg/dL) 0.00 (0.00 to 0.00) 0.014 0.00 (0.00 to 0.01) 0.012 0.00 (0.00 to 0.00) 0.752 0.00 (-0.01 to 0.00) 0.763
 HDL (mg/dL) -0.02 (-0.04 to 0.01) 0.264 0.04 (0.00 to 0.09) 0.054 -0.01 (-0.03 to 0.00) 0.061 0.04 (0.01 to 0.07) 0.003
 LDL (mg/dL) 0.01 (0.00 to 0.02) 0.123 0.02 (0.00 to 0.03) 0.008 0.00 (-0.01 to 0.00) 0.543 0.01 (0.00 to 0.02) 0.092
 Glucose (mg/dL) -0.01 (-0.02 to 0.00) 0.082 0.01 (-0.01 to 0.02) 0.369 0.00 (-0.01 to 0.02) 0.455 0.00 (-0.02 to 0.01) 0.504
 HbA1C (%) -0.27 (-0.59 to 0.05) 0.095 -0.06 (-0.55 to 0.42) 0.794 -0.08 (-0.40 to 0.23) 0.618 -0.25 (-0.62 to 0.12) 0.189
 hsCRP (mg/L) -0.17 (-0.29 to -0.06) 0.004 -0.20 (-0.35 to -0.05) 0.010 0.04 (-0.04 to 0.12) 0.283 -0.16 (-0.29 to -0.04) 0.011
 Physical activity (min/wk) 0.01 (0.00 to 0.01) <0.001 0.01 (0.01 to 0.02) <0.001 0.01 (0.00 to 0.01) 0.005 0.01 (0.00 to 0.02) 0.002
 Diabetes -1.54 (-2.46 to -0.61) 0.001 0.03 (-1.11 to 1.18) 0.954 -0.64 (-1.35 to 0.07) 0.078 -0.99 (-1.78 to -0.19) 0.016
 Dyslipidemia 1.06 (0.42 to 1.70) 0.001 1.49 (0.51 to 2.47) 0.003 0.03 (-0.32 to 0.38) 0.871 1.39 (0.54 to 2.24) 0.001
 Smoking 0.83 (0.24 to 1.41) 0.006 0.00 (-1.38 to 1.38) 0.997 0.89 (0.02 to 1.76) 0.045 -0.94 (-3.20 to 1.32) 0.414
 Drinking 1.75 (1.07 to 2.42) <0.001 1.53 (0.49 to 2.58) 0.004 0.67 (0.31 to 1.02) <0.001 0.90 (0.03 to 1.76) 0.042
Relative hand grip strength (kg/BMI)
 Age (y) -0.01 (-0.01 to -0.01) <0.001 -0.04 (-0.05 to -0.04) <0.001 -0.01 (-0.01 to -0.01) <0.001 -0.03 (-0.03 to -0.02) <0.001
 BMI (kg/m2) -0.09 (-0.10 to -0.09) <0.001 -0.08 (-0.09 to -0.06) <0.001 -0.07 (-0.07 to -0.07) <0.001 -0.05 (-0.06 to -0.04) <0.001
 WC (cm) -0.03 (-0.04 to -0.03) <0.001 -0.02 (-0.03 to -0.02) <0.001 -0.02 (-0.02 to -0.02) <0.001 -0.02 (-0.02 to -0.01) <0.001
 SBP (mm Hg) -0.01 (-0.01 to -0.01) <0.001 0.00 (0.00 to 0.00) 0.623 -0.01 (-0.01 to -0.01) <0.001 0.00 (0.00 to 0.00) 0.996
 DBP (mm Hg) -0.01 (-0.01 to -0.01) <0.001 0.01 (0.01 to 0.01) <0.001 -0.01 (-0.01 to -0.01) <0.001 0.00 (0.00 to 0.01) 0.040
 TG (mg/dL) 0.00 (0.00 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.208 0.00 (0.00 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.005
 HDL (mg/dL) 0.01 (0.01 to 0.01) <0.001 0.01 (0.01 to 0.01) <0.001 0.01 (0.01 to 0.01) <0.001 0.00 (0.00 to 0.01) <0.001
 LDL (mg/dL) 0.00 (0.00 to 0.00) 0.007 0.00 (0.00 to 0.00) 0.006 0.00 (0.00 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.030
 Fasting glucose (mg/dL) 0.00 (-0.01 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.204 0.00 (-0.01 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.028
 HbA1C (%) -0.11 (-0.14 to -0.08) <0.001 -0.06 (-0.11 to -0.01) 0.011 -0.14 (-0.17 to -0.12) <0.001 -0.05 (-0.08 to -0.01) 0.004
 hsCRP (mg/L) -0.04 (-0.05 to -0.03) <0.001 -0.01 (-0.03 to 0.00) 0.059 -0.04 (-0.05 to -0.03) <0.001 -0.01 (-0.02 to 0.00) 0.012
 Physical activity (min/wk) 0.00 (0.00 to 0.00) 0.001 0.00 (0.00 to 0.00) 0.007 0.00 (0.00 to 0.00) 0.001 0.00 (0.00 to 0.00) <0.001
 Diabetes -0.33 (-0.40 to -0.26) <0.001 -0.13 (-0.23 to -0.02) 0.019 -0.34 (-0.40 to -0.28) <0.001 -0.12 (-0.19 to -0.04) 0.002
 Dyslipidemia -0.19 (-0.24 to -0.13) <0.001 0.00 (-0.08 to 0.09) 0.955 -0.18 (-0.21 to -0.15) <0.001 0.04 (-0.03 to 0.11) 0.277
 Smoking 0.09 (0.04 to 0.14) <0.001 0.10 (-0.01 to 0.20) 0.077 0.02 (-0.06 to 0.10) 0.610 -0.08 (-0.23 to 0.07) 0.281
 Drinking 0.17 (0.11 to 0.23) <0.001 0.12 (0.02 to 0.21) 0.013 0.07 (0.04 to 0.10) <0.001 0.07 (0.00 to 0.14) 0.049

Values are from linear regression analysis; coefficients are unstandardized.

BMI, body mass index; CI, confidence interval; WC, waist circumference; SBP, systolic blood pressure; DBP, diastolic blood pressure; TG, triglycerides; HDL, high-density lipoprotein; LDL, low-density lipoprotein; HbA1C, hemoglobin A1c; hsCRP, high-sensitivity C-reactive protein.

Table 3.
Results from multivariate linear regression analysis of the associations of relative handgrip strength (strength/BMI) and dominant handgrip strength (kg) with cardiometabolic markers
Predictor Men
Women
Aged 20–64 y
Aged 65–80 y
Aged 20–64 y
Aged 65–80 y
β (95% CI) P-value β (95% CI) P-value β (95% CI) P-value β (95% CI) P-value
Dominant hand grip strength (kg)
 BMI (kg/m2) 0.65 (0.46 to 0.85) <0.001 0.21 (-0.13 to 0.56) 0.218 0.18 (0.07 to 0.29) 0.002 0.10 (-0.07 to 0.27) 0.241
 WC (cm) -0.07 (-0.14 to 0.00) 0.062 0.06 (-0.05 to 0.17) 0.263 0.04 (0.00 to 0.09) 0.045 0.02 (-0.05 to 0.08) 0.613
 SBP (mm Hg) -0.01 (-0.04 to 0.02) 0.614 -0.01 (-0.03 to 0.02) 0.633 -0.03 (-0.05 to 0.00) 0.019 0.01 (-0.01 to 0.03) 0.430
 DBP (mm Hg) 0.03 (-0.01 to 0.08) 0.118 0.06 (0.00 to 0.12) 0.042 0.05 (0.02 to 0.08) 0.001 0.01 (-0.03 to 0.05) 0.639
 TG (mg/dL) 0.00 (0.00 to 0.00) 0.402 0.00 (0.00 to 0.01) 0.365 0.00 (-0.01 to 0.00) 0.020 0.00 (-0.01 to 0.00) 0.396
 HDL (mg/dL) 0.01 (-0.02 to 0.04) 0.485 0.06 (0.02 to 0.09) 0.005 -0.01 (-0.03 to 0.00) 0.187 0.02 (-0.01 to 0.04) 0.248
 LDL (mg/dL) 0.00 (-0.01 to 0.01) 0.903 0.01 (0.00 to 0.02) 0.079 -0.01 (-0.01 to 0.00) 0.118 0.00 (-0.01 to 0.01) 0.672
 Fasting glucose (mg/dL) -0.01 (-0.03 to 0.02) 0.604 0.01 (-0.01 to 0.04) 0.418 0.02 (0.00 to 0.03) 0.112 0.01 (-0.01 to 0.03) 0.178
 HbA1C (%) 0.18 (-0.40 to 0.75) 0.544 -0.68 (-1.45 to 0.10) 0.086 -0.31 (-0.82 to 0.19) 0.225 0.02 (-0.57 to 0.61) 0.951
 hsCRP (mg/L) -0.19 (-0.29 to -0.08) <0.001 -0.12 (-0.25 to 0.01) 0.069 -0.09 (-0.17 to -0.01) 0.028 -0.14 (-0.27 to 0.00) 0.045
 Physical activity (min/wk) 0.01 (0.00 to 0.01) <0.001 0.01 (0.00 to 0.01) 0.022 0.01 (0.00 to 0.01) 0.009 0.00 (0.00 to 0.01) 0.471
 Diabetes -1.37 (-2.72 to -0.02) 0.046 0.22 (-1.15 to 1.59) 0.754 -1.38 (-2.48 to -0.27) 0.015 -1.23 (-2.36 to -0.09) 0.035
 Dyslipidemia 0.43 (-0.28 to 1.15) 0.235 0.22 (-0.80 to 1.24) 0.668 0.24 (-0.20 to 0.68) 0.284 0.68 (-0.21 to 1.58) 0.136
 R2 0.10 0.25 0.06 0.17
Relative hand grip strength (kg/BMI)
 BMI (kg/m2) -0.08 (-0.09 to -0.06) <0.001 -0.10 (-0.12 to -0.07) <0.001 -0.07 (-0.08 to -0.06) <0.001 -0.06 (-0.07 to -0.04) <0.001
 WC (cm) -0.01 (-0.01 to 0.00) 0.073 0.01 (0.00 to 0.01) 0.230 0.00 (0.00 to 0.01) 0.080 0.00 (0.00 to 0.01) 0.598
 SBP (mm Hg) 0.00 (0.00 to 0.00) 0.509 0.00 (0.00 to 0.00) 0.952 0.00 (0.00 to 0.00) 0.015 0.00 (0.00 to 0.00) 0.398
 DBP (mm Hg) 0.00 (0.00 to 0.01) 0.065 0.01 (0.00 to 0.01) 0.024 0.00 (0.00 to 0.01) <0.001 0.00 (0.00 to 0.00) 0.526
 TG (mg/dL) 0.00 (0.00 to 0.00) 0.519 0.00 (0.00 to 0.00) 0.408 0.00 (0.00 to 0.00) 0.009 0.00 (0.00 to 0.00) 0.111
 HDL (mg/dL) 0.00 (0.00 to 0.00) 0.052 0.00 (0.00 to 0.01) 0.003 0.00 (0.00 to 0.00) 0.634 0.00 (0.00 to 0.00) 0.683
 LDL (mg/dL) 0.00 (0.00 to 0.00) 0.815 0.00 (0.00 to 0.00) 0.149 0.00 (0.00 to 0.00) 0.017 0.00 (0.00 to 0.00) 0.959
 Fasting glucose (mg/dL) 0.00 (0.00 to 0.00) 0.276 0.00 (0.00 to 0.00) 0.197 0.00 (0.00 to 0.00) 0.085 0.00 (0.00 to 0.00) 0.114
 HbA1C (%) 0.03 (-0.01 to 0.07) 0.175 -0.06 (-0.12 to 0.00) 0.067 -0.02 (-0.06 to 0.02) 0.327 -0.01 (-0.06 to 0.03) 0.600
 hsCRP (mg/L) -0.01 (-0.02 to -0.01) <0.001 -0.01 (-0.02 to 0.00) 0.122 -0.01 (-0.01 to 0.00) 0.034 -0.01 (-0.02 to 0.00) 0.029
 Physical activity (min/wk) 0.00 (0.00 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.009 0.00 (0.00 to 0.00) 0.011 0.00 (0.00 to 0.00) 0.126
 Diabetes -0.12 (-0.22 to -0.02) 0.017 -0.03 (-0.14 to 0.08) 0.595 -0.10 (-0.18 to -0.02) 0.020 -0.08 (-0.17 to 0.01) 0.085
 Dyslipidemia 0.01 (-0.05 to 0.06) 0.847 0.00 (-0.09 to 0.08) 0.950 0.01 (-0.02 to 0.05) 0.428 0.06 (-0.01 to 0.14) 0.083
 R2 0.31 0.35 0.33 0.30

Values are from linear regression analysis; coefficients are unstandardized. Age was adjusted for in the multivariate linear model.

BMI, body mass index; CI, confidence interval; WC, waist circumference; SBP, systolic blood pressure; DBP, diastolic blood pressure; TG, triglycerides; HDL, high-density lipoprotein; LDL, low-density lipoprotein; HbA1C, hemoglobin A1c; hsCRP, high-sensitivity C-reactive protein.

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Figure & Data

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    Association of Hand Grip Strength and Cardiometabolic Markers in Korean Adult Population: The Korea National Health and Nutrition Examination Survey 2015-2016
    Korean J Fam Med. 2020;41(5):291-298.   Published online May 8, 2020
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    Association of Hand Grip Strength and Cardiometabolic Markers in Korean Adult Population: The Korea National Health and Nutrition Examination Survey 2015-2016
    Association of Hand Grip Strength and Cardiometabolic Markers in Korean Adult Population: The Korea National Health and Nutrition Examination Survey 2015-2016
    Characteristic Sex
    Total P-value
    Male Female
    No. of participants 4,062 (51.0) 5,021 (49.0) 9,083 (100.0)
    Age (y) 45.62±0.32 46.89±0.34 46.24±0.28 <0.001
    BMI (kg/m2) 24.53±0.07 23.31±0.07 23.93±0.05 <0.001
    Waist circumference (cm) 86.28±0.18 78.94±0.20 82.68±0.14 <0.001
    Systolic blood pressure (mm Hg) 120.09±0.29 114.54±0.32 117.37±0.24 <0.001
    Diastolic blood pressure (mm Hg) 78.30±0.21 73.22±0.18 75.81±0.15 <0.001
    Total cholesterol (mg/dL) 191.94±0.66 193.12±0.57 192.52±0.47 0.151
    Triglycerides (mg/dL) 168.26±3.33 113.96±1.37 141.66±1.91 <0.001
    High-density lipoprotein (mg/dL) 47.47±0.22 55.14±0.23 51.23±0.17 <0.001
    Low-density lipoprotein (mg/dL) 112.98±0.60 115.48±0.50 114.20±0.43 <0.001
    Fasting glucose (mg/dL) 102.02±0.48 97.18±0.40 99.65±0.33 <0.001
    Hemoglobin A1c (%) 5.66±0.02 5.59±0.01 5.63±0.01 <0.001
    High-sensitivity C-reactive protein (mg/L) 1.32±0.04 1.11±0.03 1.21±0.03 <0.001
    Physical activity (min/wk) 45.85±2.12 21.81±0.97 34.08±1.24 <0.001
    Dominant hand grip strength (kg) 41.83±0.18 24.91±0.11 33.54±0.15 <0.001
    Absolute hand grip strength (kg) 81.69±0.33 48.28±0.20 65.32±0.28 <0.001
    Relative hand grip strength (kg/BMI)* 3.37±0.01 2.11±0.01 2.75±0.01 <0.001
    Diabetes 582 (10.8) 505 (8.6) 1,087 (9.7) <0.001
    Dyslipidemia 2,624 (64.1) 2,999 (56.0) 5,623 (60.1) <0.001
    Smoking 1,390 (37.6) 238 (5.4) 1,628 (21.8) <0.001
    Drinking 2,937 (75.2) 2,072 (44.7) 5,009 (60.3) <0.001
    Predictor Men
    Women
    Aged 20–64 y
    Aged 65–80 y
    Aged 20–64 y
    Aged 65–80 y
    β (95% CI) P-value β (95% CI) P-value β (95% CI) P-value β (95% CI) P-value
    Dominant hand grip strength (kg)
     Age (y) -0.07 (-0.09 to -0.04) <0.001 -0.61 (-0.70 to -0.53) <0.001 -0.02 (-0.04 to -0.01) 0.003 -0.37 (-0.43 to -0.31) <0.001
     BMI (kg/m2) 0.48 (0.39 to 0.57) <0.001 0.49 (0.32 to 0.65) <0.001 0.23 (0.17 to 0.28) <0.001 0.15 (0.04 to 0.25) 0.005
     WC (cm) 0.14 (0.10 to 0.17) <0.001 0.13 (0.08 to 0.19) <0.001 0.08 (0.06 to 0.10) <0.001 0.03 (-0.01 to 0.07) 0.151
     SBP (mm Hg) 0.03 (0.01 to 0.05) 0.004 0.01 (-0.02 to 0.04) 0.591 0.01 (0.00 to 0.02) 0.251 0.00 (-0.02 to 0.02) 0.890
     DBP (mm Hg) 0.06 (0.03 to 0.09) <0.001 0.15 (0.11 to 0.20) <0.001 0.03 (0.02 to 0.05) <0.001 0.05 (0.02 to 0.08) 0.002
     TG (mg/dL) 0.00 (0.00 to 0.00) 0.014 0.00 (0.00 to 0.01) 0.012 0.00 (0.00 to 0.00) 0.752 0.00 (-0.01 to 0.00) 0.763
     HDL (mg/dL) -0.02 (-0.04 to 0.01) 0.264 0.04 (0.00 to 0.09) 0.054 -0.01 (-0.03 to 0.00) 0.061 0.04 (0.01 to 0.07) 0.003
     LDL (mg/dL) 0.01 (0.00 to 0.02) 0.123 0.02 (0.00 to 0.03) 0.008 0.00 (-0.01 to 0.00) 0.543 0.01 (0.00 to 0.02) 0.092
     Glucose (mg/dL) -0.01 (-0.02 to 0.00) 0.082 0.01 (-0.01 to 0.02) 0.369 0.00 (-0.01 to 0.02) 0.455 0.00 (-0.02 to 0.01) 0.504
     HbA1C (%) -0.27 (-0.59 to 0.05) 0.095 -0.06 (-0.55 to 0.42) 0.794 -0.08 (-0.40 to 0.23) 0.618 -0.25 (-0.62 to 0.12) 0.189
     hsCRP (mg/L) -0.17 (-0.29 to -0.06) 0.004 -0.20 (-0.35 to -0.05) 0.010 0.04 (-0.04 to 0.12) 0.283 -0.16 (-0.29 to -0.04) 0.011
     Physical activity (min/wk) 0.01 (0.00 to 0.01) <0.001 0.01 (0.01 to 0.02) <0.001 0.01 (0.00 to 0.01) 0.005 0.01 (0.00 to 0.02) 0.002
     Diabetes -1.54 (-2.46 to -0.61) 0.001 0.03 (-1.11 to 1.18) 0.954 -0.64 (-1.35 to 0.07) 0.078 -0.99 (-1.78 to -0.19) 0.016
     Dyslipidemia 1.06 (0.42 to 1.70) 0.001 1.49 (0.51 to 2.47) 0.003 0.03 (-0.32 to 0.38) 0.871 1.39 (0.54 to 2.24) 0.001
     Smoking 0.83 (0.24 to 1.41) 0.006 0.00 (-1.38 to 1.38) 0.997 0.89 (0.02 to 1.76) 0.045 -0.94 (-3.20 to 1.32) 0.414
     Drinking 1.75 (1.07 to 2.42) <0.001 1.53 (0.49 to 2.58) 0.004 0.67 (0.31 to 1.02) <0.001 0.90 (0.03 to 1.76) 0.042
    Relative hand grip strength (kg/BMI)
     Age (y) -0.01 (-0.01 to -0.01) <0.001 -0.04 (-0.05 to -0.04) <0.001 -0.01 (-0.01 to -0.01) <0.001 -0.03 (-0.03 to -0.02) <0.001
     BMI (kg/m2) -0.09 (-0.10 to -0.09) <0.001 -0.08 (-0.09 to -0.06) <0.001 -0.07 (-0.07 to -0.07) <0.001 -0.05 (-0.06 to -0.04) <0.001
     WC (cm) -0.03 (-0.04 to -0.03) <0.001 -0.02 (-0.03 to -0.02) <0.001 -0.02 (-0.02 to -0.02) <0.001 -0.02 (-0.02 to -0.01) <0.001
     SBP (mm Hg) -0.01 (-0.01 to -0.01) <0.001 0.00 (0.00 to 0.00) 0.623 -0.01 (-0.01 to -0.01) <0.001 0.00 (0.00 to 0.00) 0.996
     DBP (mm Hg) -0.01 (-0.01 to -0.01) <0.001 0.01 (0.01 to 0.01) <0.001 -0.01 (-0.01 to -0.01) <0.001 0.00 (0.00 to 0.01) 0.040
     TG (mg/dL) 0.00 (0.00 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.208 0.00 (0.00 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.005
     HDL (mg/dL) 0.01 (0.01 to 0.01) <0.001 0.01 (0.01 to 0.01) <0.001 0.01 (0.01 to 0.01) <0.001 0.00 (0.00 to 0.01) <0.001
     LDL (mg/dL) 0.00 (0.00 to 0.00) 0.007 0.00 (0.00 to 0.00) 0.006 0.00 (0.00 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.030
     Fasting glucose (mg/dL) 0.00 (-0.01 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.204 0.00 (-0.01 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.028
     HbA1C (%) -0.11 (-0.14 to -0.08) <0.001 -0.06 (-0.11 to -0.01) 0.011 -0.14 (-0.17 to -0.12) <0.001 -0.05 (-0.08 to -0.01) 0.004
     hsCRP (mg/L) -0.04 (-0.05 to -0.03) <0.001 -0.01 (-0.03 to 0.00) 0.059 -0.04 (-0.05 to -0.03) <0.001 -0.01 (-0.02 to 0.00) 0.012
     Physical activity (min/wk) 0.00 (0.00 to 0.00) 0.001 0.00 (0.00 to 0.00) 0.007 0.00 (0.00 to 0.00) 0.001 0.00 (0.00 to 0.00) <0.001
     Diabetes -0.33 (-0.40 to -0.26) <0.001 -0.13 (-0.23 to -0.02) 0.019 -0.34 (-0.40 to -0.28) <0.001 -0.12 (-0.19 to -0.04) 0.002
     Dyslipidemia -0.19 (-0.24 to -0.13) <0.001 0.00 (-0.08 to 0.09) 0.955 -0.18 (-0.21 to -0.15) <0.001 0.04 (-0.03 to 0.11) 0.277
     Smoking 0.09 (0.04 to 0.14) <0.001 0.10 (-0.01 to 0.20) 0.077 0.02 (-0.06 to 0.10) 0.610 -0.08 (-0.23 to 0.07) 0.281
     Drinking 0.17 (0.11 to 0.23) <0.001 0.12 (0.02 to 0.21) 0.013 0.07 (0.04 to 0.10) <0.001 0.07 (0.00 to 0.14) 0.049
    Predictor Men
    Women
    Aged 20–64 y
    Aged 65–80 y
    Aged 20–64 y
    Aged 65–80 y
    β (95% CI) P-value β (95% CI) P-value β (95% CI) P-value β (95% CI) P-value
    Dominant hand grip strength (kg)
     BMI (kg/m2) 0.65 (0.46 to 0.85) <0.001 0.21 (-0.13 to 0.56) 0.218 0.18 (0.07 to 0.29) 0.002 0.10 (-0.07 to 0.27) 0.241
     WC (cm) -0.07 (-0.14 to 0.00) 0.062 0.06 (-0.05 to 0.17) 0.263 0.04 (0.00 to 0.09) 0.045 0.02 (-0.05 to 0.08) 0.613
     SBP (mm Hg) -0.01 (-0.04 to 0.02) 0.614 -0.01 (-0.03 to 0.02) 0.633 -0.03 (-0.05 to 0.00) 0.019 0.01 (-0.01 to 0.03) 0.430
     DBP (mm Hg) 0.03 (-0.01 to 0.08) 0.118 0.06 (0.00 to 0.12) 0.042 0.05 (0.02 to 0.08) 0.001 0.01 (-0.03 to 0.05) 0.639
     TG (mg/dL) 0.00 (0.00 to 0.00) 0.402 0.00 (0.00 to 0.01) 0.365 0.00 (-0.01 to 0.00) 0.020 0.00 (-0.01 to 0.00) 0.396
     HDL (mg/dL) 0.01 (-0.02 to 0.04) 0.485 0.06 (0.02 to 0.09) 0.005 -0.01 (-0.03 to 0.00) 0.187 0.02 (-0.01 to 0.04) 0.248
     LDL (mg/dL) 0.00 (-0.01 to 0.01) 0.903 0.01 (0.00 to 0.02) 0.079 -0.01 (-0.01 to 0.00) 0.118 0.00 (-0.01 to 0.01) 0.672
     Fasting glucose (mg/dL) -0.01 (-0.03 to 0.02) 0.604 0.01 (-0.01 to 0.04) 0.418 0.02 (0.00 to 0.03) 0.112 0.01 (-0.01 to 0.03) 0.178
     HbA1C (%) 0.18 (-0.40 to 0.75) 0.544 -0.68 (-1.45 to 0.10) 0.086 -0.31 (-0.82 to 0.19) 0.225 0.02 (-0.57 to 0.61) 0.951
     hsCRP (mg/L) -0.19 (-0.29 to -0.08) <0.001 -0.12 (-0.25 to 0.01) 0.069 -0.09 (-0.17 to -0.01) 0.028 -0.14 (-0.27 to 0.00) 0.045
     Physical activity (min/wk) 0.01 (0.00 to 0.01) <0.001 0.01 (0.00 to 0.01) 0.022 0.01 (0.00 to 0.01) 0.009 0.00 (0.00 to 0.01) 0.471
     Diabetes -1.37 (-2.72 to -0.02) 0.046 0.22 (-1.15 to 1.59) 0.754 -1.38 (-2.48 to -0.27) 0.015 -1.23 (-2.36 to -0.09) 0.035
     Dyslipidemia 0.43 (-0.28 to 1.15) 0.235 0.22 (-0.80 to 1.24) 0.668 0.24 (-0.20 to 0.68) 0.284 0.68 (-0.21 to 1.58) 0.136
     R2 0.10 0.25 0.06 0.17
    Relative hand grip strength (kg/BMI)
     BMI (kg/m2) -0.08 (-0.09 to -0.06) <0.001 -0.10 (-0.12 to -0.07) <0.001 -0.07 (-0.08 to -0.06) <0.001 -0.06 (-0.07 to -0.04) <0.001
     WC (cm) -0.01 (-0.01 to 0.00) 0.073 0.01 (0.00 to 0.01) 0.230 0.00 (0.00 to 0.01) 0.080 0.00 (0.00 to 0.01) 0.598
     SBP (mm Hg) 0.00 (0.00 to 0.00) 0.509 0.00 (0.00 to 0.00) 0.952 0.00 (0.00 to 0.00) 0.015 0.00 (0.00 to 0.00) 0.398
     DBP (mm Hg) 0.00 (0.00 to 0.01) 0.065 0.01 (0.00 to 0.01) 0.024 0.00 (0.00 to 0.01) <0.001 0.00 (0.00 to 0.00) 0.526
     TG (mg/dL) 0.00 (0.00 to 0.00) 0.519 0.00 (0.00 to 0.00) 0.408 0.00 (0.00 to 0.00) 0.009 0.00 (0.00 to 0.00) 0.111
     HDL (mg/dL) 0.00 (0.00 to 0.00) 0.052 0.00 (0.00 to 0.01) 0.003 0.00 (0.00 to 0.00) 0.634 0.00 (0.00 to 0.00) 0.683
     LDL (mg/dL) 0.00 (0.00 to 0.00) 0.815 0.00 (0.00 to 0.00) 0.149 0.00 (0.00 to 0.00) 0.017 0.00 (0.00 to 0.00) 0.959
     Fasting glucose (mg/dL) 0.00 (0.00 to 0.00) 0.276 0.00 (0.00 to 0.00) 0.197 0.00 (0.00 to 0.00) 0.085 0.00 (0.00 to 0.00) 0.114
     HbA1C (%) 0.03 (-0.01 to 0.07) 0.175 -0.06 (-0.12 to 0.00) 0.067 -0.02 (-0.06 to 0.02) 0.327 -0.01 (-0.06 to 0.03) 0.600
     hsCRP (mg/L) -0.01 (-0.02 to -0.01) <0.001 -0.01 (-0.02 to 0.00) 0.122 -0.01 (-0.01 to 0.00) 0.034 -0.01 (-0.02 to 0.00) 0.029
     Physical activity (min/wk) 0.00 (0.00 to 0.00) <0.001 0.00 (0.00 to 0.00) 0.009 0.00 (0.00 to 0.00) 0.011 0.00 (0.00 to 0.00) 0.126
     Diabetes -0.12 (-0.22 to -0.02) 0.017 -0.03 (-0.14 to 0.08) 0.595 -0.10 (-0.18 to -0.02) 0.020 -0.08 (-0.17 to 0.01) 0.085
     Dyslipidemia 0.01 (-0.05 to 0.06) 0.847 0.00 (-0.09 to 0.08) 0.950 0.01 (-0.02 to 0.05) 0.428 0.06 (-0.01 to 0.14) 0.083
     R2 0.31 0.35 0.33 0.30
    Table 1. Comparison of demographics between male and female participants

    Values are presented as unweighted number (weighted %) for categorical variables or mean±standard error for continuous variables. P-values are from the Rao-Scott χ² test or t-test.

    BMI, body mass index.

    Relative hand grip strength is defined as absolute hand grip strength divided by BMI.

    Table 2. Results from univariate linear regression analysis on the associations of relative handgrip strength (strength/BMI) and dominant handgrip strength (kg) with cardiometabolic markers

    Values are from linear regression analysis; coefficients are unstandardized.

    BMI, body mass index; CI, confidence interval; WC, waist circumference; SBP, systolic blood pressure; DBP, diastolic blood pressure; TG, triglycerides; HDL, high-density lipoprotein; LDL, low-density lipoprotein; HbA1C, hemoglobin A1c; hsCRP, high-sensitivity C-reactive protein.

    Table 3. Results from multivariate linear regression analysis of the associations of relative handgrip strength (strength/BMI) and dominant handgrip strength (kg) with cardiometabolic markers

    Values are from linear regression analysis; coefficients are unstandardized. Age was adjusted for in the multivariate linear model.

    BMI, body mass index; CI, confidence interval; WC, waist circumference; SBP, systolic blood pressure; DBP, diastolic blood pressure; TG, triglycerides; HDL, high-density lipoprotein; LDL, low-density lipoprotein; HbA1C, hemoglobin A1c; hsCRP, high-sensitivity C-reactive protein.

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