Another article (behind paywall) in the series “get sick only during regular business hours” show that in England admission over the weekend increases patient’s chance to die by about 10% compared with those admitted during business days. Data was validated on a set of 250 US hospitals, where they found a 20% increase in risk of dying associated with weekend admission. In England, but not in US, Sunday was even worse than Saturday.
On the other hand, should one make it, the chances of dying during the weekend shift is about 10% lower than on Wednesday. It is now unclear if, over the weekend, the puerperal fever carriers must be called to work or rather sent home.