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Assessment of statistical errors of articles published in the Journal of the Korean Academy of Prosthodontics: 2006 - 2010

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Abstract

¿¬±¸ ¸ñÀû: ´ëÇÑÄ¡°úº¸Ã¶ÇÐȸÁöÀÇ ÃÖ±Ù 5³â°£ °ÔÀçµÈ ³í¹® Áß¿¡¼­ Åë°è ¹æ¹ýÀÌ »ç¿ëµÈ ³í¹®ÀÇ ºóµµ¸¦ Á¶»çÇÏ°í Åë°è ¹æ¹ýÀÇ Á¾·ù ¹× ¿À·ùÀÇ À¯Çü°ú ºóµµ¸¦ »ìÆì º¸°í ¿À·ùº° ÀûÀýÇÑ Åë°è ¹æ¹ýÀ» Á¦½ÃÇÏ°í Åë°èºÐ¼® °¡À̵å¶óÀÎÀ» °³¹ßÇÏ¿© ´ëÇÑÄ¡°úº¸Ã¶ÇÐȸÁöÀÇ ÇмúÀû ¹ßÀü¿¡ ±â¿©ÇÏ°íÀÚ ÇÑ´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: 2006³âºÎÅÍ 2010³â±îÁö °ÔÀçµÈ ³í¹® 336Æí Áß Åë°è¹æ¹ýÀÌ »ç¿ëµÈ 255ÆíÀ» ¿¬±¸´ë»óÀ¸·Î ÇÏ¿© ¿¬µµº°·Î Åë°è ¹æ¹ý »ç¿ë ¿©ºÎ, ÁÖ·Î »ç¿ëµÈ Åë°è¹æ¹ý°ú ¼ÒÇÁÆ®¿þ¾îÀÇ À¯Çü°ú ºóµµ¸¦ Á¶»çÇÏ¿´´Ù. Åë°è¹æ¹ý º°·Î °í¾ÈµÈ °¡À̵å¶óÀο¡ µû¶ó ¿À·ù¸¦ Á¶»çÇÏ¿´´Âµ¥ ÁÖ·Î ½ÇÇè¼³°èÀÇ ÀûÀý¼º, ºÐ¼®¹ý¿¡ ´ëÇÑ °¡Á¤°ËÅä, Ç¥º»ÀÇ µ¶¸³¼º ¹× º¯¼öÀÇ ÀûÇÕ¼º, ÀûÀýÇÑ Ç¥º» ¼ö¿Í ÀûÀýÇÑ Åë°è¹æ¹ýÀÌ »ç¿ëµÇ¾ú´ÂÁö¿¡ ´ëÇÑ Æò°¡¸¦ ÇÏ¿´°í À̸¦ Åä´ë·Î °í¾ÈµÈ °¡À̵å¶óÀÎÀ» Á¦½ÃÇÏ¿´´Ù.

°á°ú: º» ¿¬±¸¿¡¼­ Á¶»çµÈ ³í¹® Áß Ãß·ÐÅë°è¸¦ »ç¿ëÇÑ ³í¹®ÀÌ 193Æí(75.9%)À¸·Î ´ë´Ù¼ö¸¦ Â÷ÁöÇÏ¿´°í »ç¿ëµÈ ¼ÒÇÁÆ®¿þ¾î´Â SPSS°¡ 153Æí(59.77%)À¸·Î °¡Àå ¸¹¾Ò´Ù. Ãß·ÐÅë°è¸¦ »ç¿ëÇÑ ³í¹®µéÀ» ´ë»óÀ¸·Î Åë°è¹æ¹ýÀ» ºÐ·ùÇÑ °á°ú ANOVA (41.5%), t-test (20.0%), ºñ¸ð¼ö ¹æ¹ý(16.9%)¼øÀ¸·Î ¸¹¾Ò°í ÃÖ±Ù¿¡ °¡±î¿ï¼ö·Ï ´Ù¾çÇÑ ºÐ¼®¹ýÀ» ½ÃµµÇÏ¿´À¸³ª À¯ÀÇÇÑ º¯È­´Â °üÂûµÇÁö ¾Ê¾Ò´Ù. ´ëºÎºÐÀÇ ³í¹®µéÀº Ç¥º»¼öÀÇ »êÃâ±Ù°Å¸¦ Á¦½ÃÇÏÁö ¾Ê¾Ò°í, ºÐ¼®¹ý¿¡ ´ëÇÑ °¡Á¤(µ¶¸³¼º, Á¤±Ô¼º, µîºÐ»ê¼º µî) °ËÅ並 ÇÏÁö ¾ÊÀº °øÅëÀûÀÎ ¿À·ù¸¦ ¹üÇß´Ù. ÀüüÀûÀ¸·Î´Â 61.2%ÀÇ Åë°èÀû ¿À·ù¸¦ ¹üÇÏ¿´´Ù.

°á·Ð: ´ëºÎºÐÀÇ ¿À·ù´Â ÀüüÀûÀÎ ºÐ¼® ÈÄ ¼¼ºÎÀûÀÎ ºÐ¼®À¸·Î µé¾î°¡¾ß Çϴµ¥ µÎ ¿äÀο¡ ´ëÇÑ »óÈ£ÀÛ¿ëÀ» ¹«½ÃÇÏ°í ´Üº¯¼ö ºÐ¼®À» ¿©·¯ ¹ø ÇÑ °æ¿ì¿Í ¿¬±¸ °èȹ ´Ü°è¿¡¼­ ÀûÀýÇÑ Ç¥º» ¼ö¸¦ »êÃâÇÏÁö ¾Ê¾Æ ³ªÅ¸³­ °æ¿ì µîÀ̾ú´Ù. ÀÌ·¯ÇÑ Åë°è ¿À·ù¸¦ ÃÖ¼ÒÈ­Çϱâ À§ÇÏ¿© ºÐ¼® ¹æ¹ý º° °ËÁ¤ ÀýÂ÷¿¡ ´ëÇÑ Åë°èºÐ¼® °¡À̵å¶óÀÎÀ» Á¦½ÃÇÏ¿´´Ù.

Purpose: Use of inappropriate statistical methods may lead to incorrect conclusions and a waste of valuable resources. The goal of this study was to assess the frequency and the types of several common statistical errors in the published articles of the Journal of the Korean Academy of Prosthodontics (JKAP) for a 5-year period.

Materials and Methods: Of 336 articles in the JKAP published from 2006 to 2010, 255 articles using statistics were reviewed and classified by statistical method and year. The frequency and types of the statistical methods were examined, and the statistical errors were evaluated by the appropriateness of the experimental design, assumption check, independent outcomes, proper sample size and suitable use of statistical method. Statistical guidelines were completed based on the appropriateness.

Results: Of the 255 articles using statistics, 193 articles (75.9%) used inferential statistics and 153 articles used SPSS statistical software (60.0%). Of the articles using inferential statistics, the three most frequently used statistical methods were ANOVA (41.5%), t-test (20.0%), and the nonparametric method (16.9%). The average rate of statistical errors was 61.2 percent, similar to the rate reported by several studies completed for the medical journal.

Conclusion: After the whole analysis of the difference among the groups, post-hoc tests for the pairwise comparisons are required. The optimal sample size calculation is an essential part of this study protocol. To minimize the occurrence of statistical errors, statistical guidelines were developed according to each statistical test procedure and will contribute to the academic improvement in the JKAP.

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Statistical error;Statistical method;Journal of the Korean Academy of Prosthodontics

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KCI
KoreaMed