Sex Differences in Post-Stroke Depression in the Elderly

Area of Science:

• Neurology
• Psychiatry
• Epidemiology

Background:

• Post-stroke depression (PSD) affects about one-third of ischemic stroke patients.
• Existing research on sex differences in PSD presents conflicting evidence.
• Understanding these differences is crucial for targeted patient care.

Purpose of the Study:

• To investigate sex differences in the risk and time course of PSD.
• To compare the incidence of PSD between female and male ischemic stroke patients in the U.S.
• To test the hypothesis that women have a greater risk of PSD.

Main Methods:

• Retrospective cohort study using de-identified Medicare beneficiary data.
• Analysis of ischemic stroke admissions between July 2016 and December 2017.
• Kaplan-Meier survival analysis and Cox regression to assess depression risk by sex over 1.5 years, adjusting for covariates.

Main Results:

• Females (n=90,474) showed a 20% higher likelihood of developing PSD than males (n=84,427) in adjusted models.
• Cumulative risk of depression was consistently higher for females throughout the 1.5-year follow-up.
• The adjusted hazard ratio for PSD in females versus males was 1.20 (95% CI 1.17-1.23).

Conclusions:

• Female stroke patients exhibit a significantly greater hazard of developing PSD over 1.5 years.
• These findings underscore the necessity for sustained depression screening in female stroke survivors.
• Further research is warranted to elucidate the underlying biological and psychosocial reasons for these sex disparities.