Initiation of antidepressants in young adults after ischemic stroke: a registry-based follow-up study

OBJECTIVE: Data on post-stroke use of antidepressants in young individuals are scarce. We examined pattern and factors associated with initiating post-stroke antidepressants (PSAD) after ischemic stroke (IS) in young adults. METHODS: Helsinki Young Stroke Registry includes patients aged 15-49 years with first-ever IS, 1994-2007. Data on prescriptions, hospitalizations and death came from nationwide registers. We defined time of initiating PSAD as time of the first filled prescription for antidepressants within 1 year from IS. We assessed factors associated with initiating PSAD with multivariable Cox regression models, allowing for time-varying effects when appropriate. RESULTS: We followed 888 patients, of which 206 (23.2%) initiated PSAD. Higher hazard of starting PSAD within the first 100 days appeared among patients with mild versus no limb paresis 2.53 (95% confidence interval 1.48-4.31) and during later follow-up among those with silent infarcts (2.04; 1.27-3.28), prior use of antidepressants (2.09; 1.26-3.46) and moderate versus mild stroke (2.06; 1.18-3.58). The relative difference in the hazard rate for moderate-severe limb paresis persisted both within the first 100 days (3.84, 2.12-6.97) and during later follow-up (4.54; 2.51-8.23). The hazard rate was higher throughout the follow-up among smokers (1.48; 1.11-1.97) as well as lower (1.78; 1.25-2.54) and upper white-collar workers (2.00; 1.24-3.23) compared to blue-collar workers. CONCLUSION: One-fourth of young adults started PSADs within 1 year from IS. We identified several specific clinical characteristics associated with PSAD initiation, highlighting their utility in assessing the risk of post-stroke depression during follow-up.