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Special Reports |
1 From the Department of Radiology, St Vincent’s Hospital (S.S.H., J.H.B., S.L.J., Y.H.P.), Department of Radiology, Kangnam St Mary’s Hospital (S.H.P., K.H.C.), and Department of Biostatistics (H.H.S.), Catholic University of Korea, 505 Banpo-dong, Seocho-ku, Seoul 137-701, Korea. Received July 23, 2001; revision requested September 24; final revision received April 15, 2002; accepted May 17. Address correspondence to H.H.S. (e-mail: hhsong@catholic.ac.kr).
PURPOSE: To determine the number of researchers who fulfill the International Committee of Medical Journal Editors (ICMJE) authorship criteria and to evaluate individual contributions.
MATERIALS AND METHODS: The author contribution lists of Radiology articles published between 1998 and 2000 with at least three authors were reviewed. The fulfillment of ICMJE criteria for authorship and the contribution percentage were assessed according to each researcher’s position in the byline and nationality (American vs international), number of researchers per article, and year of publication.
RESULTS: Sixty-eight percent of researchers fulfilled the ICMJE authorship criteria. Position in the byline indicated a significant difference in fulfillment (P < .001): 98.9% and 85.3% for the first and second authors, respectively, and 52.8% and 66.5% for the middle and last authors, respectively. American researchers had a higher percentage (78%) of fulfillment than did international researchers (57%) (P < .001). Fulfillment decreased as the number of authors per article increased (P < .001), although there was no significant change throughout 1998–2000. The mean contribution percentages decreased greatly from first to second to last to middle authors. American researchers had a significantly larger mean contribution percentage than did international researchers. Of the total 6,686 researchers, 2,316 (35%) contributed to one or two categories. This rate was higher for middle and international authors.
CONCLUSION: The 68% fulfillment of criteria for authorship was closely related to the large number of researchers contributing to one category or to categories belonging to the same ICMJE criterion.
© RSNA, 2003
Index terms: Education • Radiology and radiologists, research
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