Background
: The study of serum total cholesterol for adults are abundant, but it was not for children and adolescents. Thus, we carried out the study of serum total cholesterol depending on sex, age and body measures for healthy children and adolescents.

Methods : From April 1, 1993 to April 30, 1993, we requested health examination for elementary schools, middle schools and high schools located in Taegu. Among them, 249 students accepted it and we studied for them.

Results : Among 249 students, males were 118(47.4%) and females were 131(52.5%). According to age, elementary school boys(girls) were 122(49%), middle school students were 25(10%), and high school students were 102(40.9%). The mean of serum total cholesterol of study subjects was 167.3mg/dl. In cases of males, it was 161.2mg/dl and females, it was 174.8mg/dl. The mean of serum total cholesterol of females was significantly higher than males. The mean of serum total cholesterol was significantly different depending on sex and height, as increasing of relative weight the mean of serum total cholesterol trended to increase. The mean of serum total cholesterol trended different levels depending on age and weight.

Conclusion : In the study of mean serum total cholesterol for children and adolescents depending on sex, age and body measures, the mean of total serum cholesterol was significantly different depending on sex, height and relative weight. In children and adolescents, it is important to effort for collection of reversible factor, relative weight and serum cholesterol after screening test.

Background
: Recently epidemiologic study of chronic diseases on island inhabitants is very lack. So we searched for the prevalance rate of chronic diseases, classification of chronic diseases and relationship between chronic diseases and health risk factors on island inhabitans.

Methods : This survey was executed from October 10th. 1992 to October 15th. 1992 on 477 Docho Do inhabitans and the results were as follows.

Results : The prevalance rate of chronic diseases on island inhabitants was 48.8%. The difference general characteristics between chronic disease group and non-chronic disease group was statistically insignificant.
There was significant difference between hepatitis vasccination and chronic disease in relationship of health risk factor and chronic disease group. (P<0.05)
The chronic diseases on island inhabitants were arthritis, hypertension, heart disease, gastric disease, liver disease, etc.

Conclusion : We knew result from this study that prevalance rate of chronic disease and the relationship of health risk factor and classification of chronic disease on island inhabitants.
Further studies which can overcome for the limitation of this survey should be performed.
So we need more attention to the health examination on island inhabitants.