Table 1.

Change of all-female authorships from 2007/2008 to 2017/2018 and separately for journals of high, medium, and low impact factor

	2007/2008			2017/2018
	Total observations	Female observations	AER [95% CI]	Total observations	Female observations	AER [95% CI]	AOR [95% CI]	Descriptive p-value
Overall	8344	1575	16.1 [15.1–17.2]	11406	2938	22.99 [22.0–24.1]	1.6 [1.4–1.7]	< .0001
High IF	4608	791	14.6 [13.4–15.8]	6380	1499	20.8 [19.5–22.0]	1.5 [1.4–1.7]	< .0001
Medium IF	2796	622	19.5 [17.9–21.3]	3145	923	26.8 [25.0–28.7]	1.5 [1.3–1.7]	< .0001
Low IF	940	162	14.6 [12.4–17.2]	1881	516	24.8 [22.6–27.2]	1.9 [1.5–2.4]	< .0001

Logistic mixed model. Abbreviations: AER adjusted event rate, AOR adjusted odds ratio, IF impact factor, CI confidence interval