Two new studies have found that stroke patients who enter the hospital at night and on weekends are more likely to die in the hospital than those who have strokes at "regular" hours. Researchers found that the mortality rate for weekday admissions (7.9 percent) for all strokes was much lower than weekend admissions (10.1 percent). For ischemic stroke, mortality rates were 7.3 percent on weekdays versus 8.2 percent for nights and weekends.