Hospital 'code blue' deadlier at night

Patients who go into cardiac arrest while in the hospital are more likely to die if it happens after 11 p.m., according to a study. The study didn't examine why days and overnights differed, but researchers found among the late night cases a higher portion of instances where patients were discovered with no heart electrical activity. Staff who are fatigued, less experienced or too few in number could also be a factor, researchers speculated.