Objectives: To determine the association between use of selective serotonin reuptake inhibitors (SSRIs) and objective measures of sleep disturbances in older community-dwelling women, including women without evidence of depression.
Design: Cross-sectional study.
Setting: Four U.S. clinical centers.
Participants: Two thousand eight hundred fifty-three women aged 71 and older (2,630 nonusers of antidepressants and 223 taking SSRIs alone, not in combination with other antidepressants).
Measurements: Medication use, assessed using an interviewer-administered questionnaire with verification of use from medication containers and computerized dictionary used to categorize type of medication; evidence of depression assessed using self-report or a score of 6 or higher on the Geriatric Depression Scale; and sleep parameters measured using a wrist actigraph, with data collected for an average of four consecutive 24-hour periods.
Results: Of the overall cohort of 2,853 women and of 2,337 women without evidence of depression, sleep disturbances were more common in women taking SSRIs than in those not taking antidepressants. After excluding women with evidence of depression and adjusting for multiple potential confounders, women taking SSRIs were more likely to have a sleep duration of 5 hours or less (multivariate odds ratio (MOR)=2.15, 95% confidence interval (CI)=1.04-4.47), sleep efficiency less than 70% (MOR=2.37, 95% CI=1.32-4.25), sleep latency of 1 hour or more (MOR=3.99, 95% CI=2.29-6.96) and eight or more long wake episodes (MOR=1.75, 95% CI=0.99-3.10).
Conclusion: SSRI use by older women, including those without evidence of depression, is associated with a greater likelihood of sleep disturbances, including poorer sleep efficiency, longer sleep latency, and sleep fragmentation, manifested by multiple long wake episodes. These results add to the uncertainty regarding risks and benefits of SSRI use in aged populations.