['To estimate the effect of day of the week on the odds of being discharged alive from an intensive care unit (ICU).', 'A longitudinal analysis of risk of discharge by day of the week.', "4569 patients admitted to the ICU of St Thomas' Hospital, London, from 2002 to 2006.", 'The odds of being discharged alive were lowest on the weekend and literally climbed during the week.'] Are hospitals dangerous places?