Two-year longitudinal study of post-stroke mood disorders: comparison of acute-onset with delayed-onset depression.

Patients who developed post-stroke depression 3 to 24 months after hospital discharge (N = 21) were compared with patients who developed depression during hospitalization (N = 26) and patients who never developed depression over 24 months of follow-up (N = 15). During the acute hospitalization and at follow-up, the three groups were not significantly different in their demographic characteristics, neurological impairment, intellectual impairment, or quality of social support. The acute depression group, however, showed an increased correlation between impairment and depression from hospitalization to follow-up. Findings suggest that impairment does not produce depression, but, once depression occurs, it may interact with impairment to influence post-stroke recovery.