liucheng

Death within 28 day (n = 490)

Patients for further selection

patients were diagnosed as \"stroke\" (n = 4978)

Survival within 28 day (n = 2036)

The following patients were excluded:less than 24 hours of ICU stay (n = 0)more than 28 days of hospital stay （n = 196）less than 18-years-old (n = 0)

excluded patients who were without hypertension (n = 2256)