For adults, the odds of surviving extracorporeal membrane oxygenation (ECMO) depend on which hospital provides the life-supporting treatment, with the best odds at ones that use the technique dozens of times a year, a new study finds.

Researchers at the University of Michigan Medical School looked at data from 56,222 patients treated at 290 hospitals around the world over 25 years. In the paper, they report that adults treated with ECMO were less likely to die when they were treated at hospitals caring for more ECMO patients per year. But they stop short of recommending a cutoff point for the minimum number of ECMO cases a hospital should have in order to warrant offering ECMO as an option.