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Journal of the Korean Academy of Family Medicine 1991;12(6):46-67.
Published online June 1, 1991.
An assessment of methodological and statistical validity of medical articles published in Korea, from 1980 to 1989.
Hyoung Ki Lee, Bong Yul Huh, Youn Ok Ahn
1980 년대에 발표된 국내 의학연구논문의 방법론 및 통계처리기법의 타당성에 관한 평가 연구
이형기, 허봉렬, 안윤옥
서울대학교병원 가정의학과 서울대학교의과대학 예방의학교실
Abstract
The methodological and statistical validity of 382 original articles published in the Journal of the Korean Medical Association, from January 1980 to December 1989 was reviewed by the author devised checklist consisting of 21 items(14 items for methodological validity and 7 items for statistical validity). Results show that 379 articles(99.2%) have one or more invalid items for methodology, and of 297 articles using statistical analyses a total of 290 articles (97.6%) were found to contain at least on error in statistical methods used. The mean and standard deviation of 'validity score of one article', defined as the total number of valid items divided by the total number of applicable items and then multiplied by 100, were 43,8 and 15.2, respectively. The distribution of validity score was as follows; over 60(57 articles, 14.9%), 30 to 59(266 articles, 69.6%), and under 30(59 articles, 15.5%). The proportion of articles, of which validity score was over 60, was significantly higher in descriptive study(19.4%) than in analytic study(8.4%, p=0.003). Also the articles of over-60 in validity sectional study(16.8%) than in logitudinal study(10.6%), but this finding was not statistically significant. The average validity score of two year period was highest in 1984-1985(50.24), and lowest in 1986-1987(38.85). There was no signicant time trend of the averaged validity score over 10 years.(0.1These results suggest that medical articles published in Korea, 1980-1989, were short of their expected quality, and there have been no evidence of improvement with time. It is concluded that a basic training in biostatistical methods in the medical postgraduates and residencies, more consultation of medical investigators with statistician or other experts, and careful review by someone knowledgeable in biostatistics or research design before accepting a manucript are needed. In addition, refutation should be allowed for the controversial point through the journal.
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