Background: Physical activity (PA) is associated with lower risk of stroke. We tested the hypothesis that lack of pre-stroke PA is an independent predictor of poor outcome after first-ever ischemic stroke.
Methods: We assessed recent self-reported PA and other potential predictors for loss of functional independence - modified Rankin Scale (mRS) > 2 - one year after first-ever ischemic stroke in 1370 patients registered between 2006 and 2010 in the Ludwigshafen Stroke Study, a population-based stroke registry.
Results: After 1 year, 717 (52.3%) of patients lost their independence including 251 patients (18.3%) who had died. In multivariate logistic regression analysis lack of regular PA prior to stroke (Odds Ratio (OR) 1.7, Confidence Interval (CI) 1.1-2.5), independently predicted poor outcome together with higher age (65-74: OR 1.7; CI 1.1-2.8, 75-84 years: OR 3.3; CI 2.1-5.3; ≥85 years OR 14.5; CI 7.4-28.5), female sex (OR 1.5; CI 1.1-2.1), diabetes mellitus (OR 1.8; CI 1.3-2.5), stroke severity (OR 1.2; CI 1.1-1.2), probable atherothrombotic stroke etiology (OR 1.8; CI 1.1-2.8) and high leukocyte count (> 9.000/mm3; OR 1.4; CI 1.0-1.9) at admission. Subclassifying unknown stroke etiology, embolic stroke of unknown source (ESUS; n = 40, OR 2.2; CI 0.9-5.5) tended to be associated with loss of independence.
Conclusion: In addition to previously reported factors, lack of PA prior to stroke as potential indicator of worse physical condition, high leukocyte count at admission as indicator of the inflammatory response and probable atherothrombotic stroke etiology might be independent predictors for non-functional independence in first-ever ischemic stroke.
Keywords: Cerebral infarction; Outcome; Physical activity; Predictors; Risk factors; Stroke.