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. 2018 Apr 13;8(4):e020089. doi: 10.1136/bmjopen-2017-020089

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© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

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Female authorships (FAP) by authors per article. Although the female authorship odds ratios (FAORs) for first authorships and last authorships have the tendency to slightly increase and decrease, respectively, with an increasing number of authors, this trend is reversed for higher author rates (>12 authors/article). FAP, FAORs and Prestige Index (PI) show no clear correlation to the number of authors per article.