http://stroke.ahajournals.org/content/48/9/2527?etoc=
The Medicare Cohort From 2009 to 2013
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Abstract
Background and Purpose—An
increasing number of hospitals have been certified as primary stroke
centers (PSCs). It remains unknown whether the action toward PSC
certification has improved the outcome of stroke care. This study aimed
to understand whether PSC certification reduced stroke mortality.
Methods—We
examined Medicare fee-for-service beneficiaries aged ≥65 years who were
hospitalized between 2009 and 2013 for ischemic stroke. Hospitals were
classified into 3 groups: new PSCs, the hospitals that received initial
PSC certification between 2009 and 2013 (n=634); existing PSCs, the PSCs
certified before 2009 (n=785); and non-SCs, the hospitals that have
never been certified as PSCs (n=2640). Multivariate logistic regression
and Cox proportional hazards model was used to compare the mortality
among the 3 groups.
Results—Existing PSCs were significantly larger than new PSCs as reflected by total number of beds and annual stroke admission (P<0.0001).
Compared with existing PSCs, new PSCs had lower in-hospital (odds
ratio, 0.862; 95% confidence interval [CI], 0.817–0.910) and 30-day
mortality (hazard ratio [HR], 0.981; 95% CI, 0.968–0.993), after
adjusting for patient demographics and comorbidities. Compared with
non-SCs, new PSCs had lower adjusted in-hospital (odds ratio, 0.894; 95%
CI, 0.848–0.943), 30-day (HR, 0.904; 95% CI, 0.892–0.917), and 1-year
mortality (HR, 0.907; 95% CI, 0.898–0.915). Existing PSCs had lower
adjusted 30-day (HR, 0.922; 95% CI, 0.911–0.933) and 1-year mortality
(HR, 0.900; 95% CI, 0.892–0.907) than non-SCs.
Conclusions—Obtaining
stroke certification may reduce stroke mortality and overcome the
disadvantage of being smaller hospitals. Further study of other outcome
measures will be useful to improve stroke system of care.
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