Oct

4

Night Time Surgery 'Doubles Death Risk':

People who undergo surgery at night are twice as likely to die as those operated on during regular daytime hours, research suggests.

The findings, being presented at a conference, also suggest a higher than usual risk of death among those who have surgery later in the day and in the early evening. 30-Day Hospital Survival Rates The results are based on studying 30-day survival rates for patients at a hospital in Montreal, Canada. Between April 2010 and March 2015, the researchers were able to compile a database of 41,716 emergency and routine operations carried out on 33,942 patients.

The operations were classified as taking place either in the daytime between 7.30 am and 3.29 pm; during the evening between 3.30 pm and 11.29 pm; or at night between 11.30 pm and 7.29 am. The researchers found that, after making allowances for assessment of patients' overall health and other factors such as age, those patients operated on in the night were 2.17 times more likely to die than those operated on during regular daytime working hours. Also, patients operated on late in the day were 1.43 times more likely to die than those operated on during regular daytime working hours.

Arch Stanton notes:

The article says the study made “allowances for assessment of patients’
overall health,” but in my experience hospitals undertake surgery at
night only if it’s urgent. This seems like a huge bias.


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  1. Arch Stanton on October 4, 2016 2:52 pm

    The article says the study made “allowances for assessment of patients’ overall health,” but in my experience hospitals undertake surgery at night only if it’s urgent. This seems like a huge bias.

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