국내 일부 주요 의학회지의 연구방법론 및 통계분석방법 활용에 관한 비교 연구 : 1992년과 2002년
(A) Comparative Study for Research Designs and Statistical Methods used in Major Korean Medical Journals : 1992 and 2002
역학 및 보건정보학과
의학회지 연구방법론 통계분석방법;
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Purposes: This study is to compare research designs and statistical methods used in selected journals from the three fields of medicine, namely, the basic, the general, and the clinical fields, published in 1992 and 2002. Methods: Three journals of Korean Journal of Preventive Medicine (KJPM), Yonsei Medical Journal(YMJ) and Korean Journal of Gastroenterology(KJG) from each of the above-mentioned fields were analyzed to figure out its significant differences of the research designs as well as statistical methods. Articles in the journals were classified by research designs using Feinstein(1985)'s criteria, by its general purposes, by its concrete study goals, by the components of study group, and by statistical methods employed. To verify statistical association regarding study designs and statistical methods used in the journals and in its publication years, the chi-squared test and Fisher's exact test were used. Results: Regarding research designs, KJPM contributed much to case-effect analyses and risk factor analyses, and YMJ contributed to descriptive studies and pathological analyses while KJG to case-report and pathological analyses. For all journals, cross-sectional studies were the most commonly used design types. Comparing to 1992, the proportion of case-effect researches in 2002 increased from 20.9% to 28.6% on their general purposes; risk factor analyses increased from 11.8% to 28.3% on concrete study goals; and surveys of therapy from 11.8% to 21.3/% on their study designs. For statistical methods used in articles, a significant improvement was found in a decade. In 2002, the proportion of articles which used statistical methods were 91.2%, comparing to 85.7% in 1992. The average number of statistical methods used were 2.64, 1.90 and 1.72 per article in KJPM, YMJ and KJG, respectively. The most commonly used statistical method were the t-test and contingency tables regardless of journal types. In KJPM, however, more diverse and more advanced statistical methods were used than the others. Between 1992 and 2002, the proportion of articles which used advanced statistical methods has increased from 9.1% to 13.6%. Conclusions: Noting that research designs in medical journals depend on their principles and characteristics of its own fields, there is a limitation of generalizing our study results to all medical journals. However, it can be seen that the statistical methods used in Korean medical journals have been steadily improved over last 10 years.