Hazard ratios of death by 30 d in univariable and multivariable models.

Patient case mix: age, sex, stroke type, consciousness level, hypoxia, independence in activities of daily living before stroke, arm weakness, leg weakness, dysphasia, hemianopia. Organisational characteristics: total number of SU beds, 24/7 on-site stroke thrombolysis service. Staffing: physician ward rounds 7 d/wk, number of healthcare assistants/ten beds on weekends. Care quality: only in ICU, HDU, or SU in first 24 h, antiplatelet therapy within 24 h (if indicated), brain scan within 24 h of admission.