Britons who have a planned surgery on a Friday are 44 percent more likely to die. And the few patients who had a leisurely weekend surgery saw that number jump to 82 percent. The skeleton staff working on weekends might be to blame.
Researchers stressed, however, that not only is the weekend surgery sample size small, it is also likely biased in some way—perhaps only the already-most desperate of patients would have an operation on the weekend. Operations scheduled for Friday, though, are more comfortably compared to Monday, and the jump in mortality rates is striking.
It’s not just Britian:
A similar study conducted in American Veterans Affairs hospitals found that the odds of a patient dying in the 30 days following surgery jumped when the surgery happened on Friday.