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Background and purpose: Poorer stroke care processes and outcomes have been reported for acute stroke patients arriving at centres during off hours and weekends. Objective: To compare each step of the continuous specialized care that Stroke Centres (SC) provide according to time of admission and final outcome. Methods: Observational study of consecutive stroke patients admitted to SC during 2008 and 2009. Patients were classified into two groups according to their arrival time: Work Hours (WH) and Off Hour (OH) (weekends and any time other than 8:00 am to 3:00 pm on weekdays). Differences in time to diagnostic procedures, tPA administration, stroke outcome [modified Rankin Scale, (mRS)] and in-hospital fatality rates were analysed. Results: A total of 912 patients were admitted. Data from 674 patients fulfilling study criteria were analysed. A total of 434 (64.4%) patients arrived during OH. No differences in stroke severity were found when comparing OH and WH. Time to blood test results was higher for WH (median 67 min vs. 47 min; P < 0.01), but time to cranial CT scan was similar. Intravenous tPA was administered to 58 (16.4%) OH vs. 26 (13.1%) WH patients ( P = 0.33). OH arrival was not associated with poorer outcome (mRS ≥ 3) at discharge (32.8% vs. 37%; P = 0.27), or at the 3-month follow-up (30.6% vs. 27.6%, P = 0.52). No differences were found for in-hospital fatality rates (5.8% vs. 5.4%, P = 1.00). Conclusions: The care provided by SC with neurologists on call 24/7 prevents differences in outcomes associated with time of admission and guarantees equal attention to stroke patients. [ABSTRACT FROM AUTHOR]