Abstract WP167: Effects of Selective Serotonin Reuptake Inhibitors versus Tricyclic Antidepressants on Cerebrovascular Events
Background: The objective of this study was to examine the effects of selective serotonin reuptake inhibitors (SSRIs) versus tricyclic antidepressants (TCAs) on cerebrovascular events in patients with depression or anxiety.
Methods: We performed a retrospective cohort study in a nationwide population. The patients who started to take SSRIs and TCAs with a diagnosis of depression or anxiety between January 1, 2001 and December 31, 2009 were identified from the Taiwan National Health Insurance claims database. We examined the association between the two types of antidepressants and incidence of stroke using a proportional hazard model adjusted for risk factors for stroke.
Results: Among of the 24,662 SSRI and 14,736 TCA initiators, the crude incidence rate for stroke was 10.03 and 13.77 per 100 person-years respectively. SSRI use was associated with a significantly reduced risk as compared with TCAs with the adjusted hazard ratio of 0.67 (95% confidence interval 0.47 to 0.96) in a dose-dependent manner. No significant effect modification was found among subgroups, such as hypertension, diabetes, previous cardiovascular and cerebrovascular diseases. The adjusted hazard ratio was 1.09 (95% confidence interval 0.65 to 1.85) for those aged more than 65 years, suggesting only a potential trend for a higher risk of stroke with SSRIs in the geriatric group.
Conclusions: As compared with TCAs, the use of SSRIs was associated with a reduced risk for cerebrovascular events in a clear dose-response manner. Further researches are needed to examine the potential risk and benefit of SSRI use for patients with high risk of stroke.
- © 2012 by American Heart Association, Inc.