Surgery Studies Rarely Use Females

An analysis of papers published in several surgical journals reveals an overwhelming reliance on male subjects and male-derived cells.

kerry grens
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WIKIMEDIA, TOMBESex biases are evidenced in many areas of science—from clinical trials in humans to basic neuroscience studies on animals. Often, male subjects are overrepresented, compromising the generalizability of findings. In a study published in the September issue of Surgery, researchers from Northwestern University analyzed more than 2,300 papers from five surgical journals, finding an overwhelming skew toward investigations involving male-only subjects and cells derived from males.

“Women make up half the population, but in surgical literature, 80 percent of the studies only use males,” Northwestern Medicine vascular surgeon Melina Kibbe, who led the study, said in a press release.

The studies Kibbe and her colleagues reviewed were published in the Annals of Surgery, the American Journal of Surgery, JAMA Surgery, the Journal of Surgical Research, and Surgery from 2011 to 2012. About a quarter of the studies involved animals or cells. Just 3 percent of the total reported using both male and female subjects or cells, while another 22 percent did not state the sex.

According to the release, “editors of the five major surgical journals reviewed in this study have responded to this finding and will now require authors to ...

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  • kerry grens

    Kerry Grens

    Kerry served as The Scientist’s news director until 2021. Before joining The Scientist in 2013, she was a stringer for Reuters Health, the senior health and science reporter at WHYY in Philadelphia, and the health and science reporter at New Hampshire Public Radio. Kerry got her start in journalism as a AAAS Mass Media fellow at KUNC in Colorado. She has a master’s in biological sciences from Stanford University and a biology degree from Loyola University Chicago.

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