W omen experience worse outcomes after stroke than men 1 despite their lower age-adjusted incidence of stroke.2 Previous reviews of sex differences in select stroke outcomes, including activity limitations, 3-5 participation restriction, 4 poststroke depression (PSD), 3 and health-related quality of life (HRQoL), 3,4 demonstrated that women had worse outcomes than men across many of these measures. Women's greater age and stroke severity, as well as poorer prestroke function, seem to contribute to the sex difference in outcomes, but data on other contributing factors are limited.4 Existing reviews included studies published >5 years ago, and given the rapid increase in the number of studies addressing sex differences in stroke outcomes, an updated review is warranted.
MethodsFull details of our methods are provided in the online-only Data Supplement. A previous review included studies up to 2007, 3 so we reviewed studies from 2007 onwards that examined sex differences in patient reported outcome measures (PROMs) at ≤12 months after stroke, including activity limitations, HRQoL, participation restriction, impaired cognition, and mood. 6 Full results tables are shown in the online-only Data Supplement.
Results
Activity LimitationsOf 1875 articles identified, 22 studies (3 population based) that were designed to examine sex differences (Results and Table I in the online-only Data Supplement) met criteria for inclusion. The most common instrument to assess activity limitations was the modified Rankin Scale, followed by the Barthel Index.In 8 studies including ischemic and hemorrhagic strokes, unadjusted estimates showed that women had more activity limitations than men through significantly lower odds of good outcome (odds ratio [OR] range: 0.44-0.61) 7-9 or greater odds of poor outcome (OR range: 1.29-1.62).10-14 In multivariable adjusted analyses, women had worse outcome than men with significantly lower odds of good outcome (OR range: 0.37-0.75) or greater odds of poor outcome (OR range: 1.17-1.74). 7,8,10,12,13 In 2 studies, there was no statistically significant difference between women and men.11,14 Adjustment for covariates, most commonly age, stroke severity, comorbidities, and prestroke function, reduced the associations between 9% and 20%, suggesting these factors partly explain the greater activity limitations for women after stroke.In 11 studies of ischemic stroke ( Table I in the online-only Data Supplement), women generally had worse outcome than men demonstrated by greater odds of poor outcome (mostly modified Rankin Scale ≥3 versus <3; range in ORs: 1.13-2.40) or lower odds of good outcome (eg, modified Rankin Scale ≤1 versus >1 or independent walking).15-25 Among 13 multivariable adjusted comparisons between men and women (some studies had >1 comparison), women's significantly worse outcome compared with men persisted in 7 comparisons with a greater odds of poor outcome (range, 1.30-3.40) or a higher activities of daily living score. [17][18][19][22][23][24] Common covariates included age, stro...