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KMID : 1155220120370010001
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Journal of the Korean Society of Health Information and Health Statistics
2012 Volume.37 No. 1 p.1 ~ p.11
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Analysis on the Statistical Methods and Errors in Articles of Korean Journal of Clinical Pharmacy
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Yang Seong-Hee
Lee Tae-Rim
Lee Suk-Hyang
Rhew Ki-Yon
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Abstract
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Objectives: Statistical analysis is fundamental to demonstrate internal validity of study results. The purpose of this study is to review statistical methods and errors in articles published in the Korean Journal of Clinical Pharmacy (KJCP).
Methods: We reviewed appropriateness and validity of statistical methods in articles published in the KJCP from 2006 through 2010 using checklist for assessing the methodological and statistical validity. Frequency of applied inferential statistical methods and errors were analyzed using SPSS® version 12.0.
Results: Total 85 original articles were reviewed. Among them, 19 articles used the descriptive statistics only, and 66 articles used both descriptive and inferential statistics. Frequently used methods were ANOVA (23.8%), t-test (19.8%), and χ2 test (12.9%). Errors of omission were found 45 times in 36 articles and errors of commission were found 41 times in 30 articles. Only 39.4% of papers were free from statistical errors.
Conclusions: We could found various types of statistical errors in the articles published in the KJCP.Clinical researchers need to be more cautious in applying statistical methods of study to ensure internal validity of results.
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KEYWORD
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Data analysis, Statistical methods, Validity, Statistical error, Checklist
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