Abstract
Chiu H-T, Wang Y-H, Jeng J-S, Chen B-B, Pan S-L. Effect of functional status on survival in patients with stroke: is independent ambulation a key determinant? ObjectiveTo investigate the effect of functional status, measured using the Modified Rankin Scale (MRS), at 3 months after stroke on survival in patients with stroke. DesignCohort study. SettingReferral medical center. ParticipantsPatients with stroke (N=1032). InterventionsNot applicable. Main Outcome MeasureSurvival after stroke. ResultsThe Kaplan-Meier survival curves stratified by the 3-month MRS score showed 2 clear groups of patients with 3-month MRS scores of 0 to 3 (able to walk without assistance) and 4 or 5 (unable to walk without assistance). Accordingly, we grouped the patients into a high function (HF) group (3-month MRS≦3) and a low function (LF) group (3-month MRS≧4). Multiple Cox regression analysis showed that the LF group had significantly poorer survival (adjusted hazard ratio=4.69; 95% confidence interval [CI], 2.89–7.60; P<.001) than the HF group. Other significant risk factors of higher mortality were older age, history of diabetes mellitus, and heart disease. ConclusionsThis study showed a significant influence of the 3-month MRS score on stroke survival. Moreover, independent ambulation may be a major determinant of a favorable survival prognosis. This finding suggests a potential role of rehabilitation in promoting stroke survival by maximizing ambulation function.
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