Women were a relative 27% less likely to receive ECMO than their male counterparts (adjusted OR 0.73, 95% CI 0.70-0.75), while patients on Medicaid were nearly half as likely to be treated with the more advanced treatment for severe respiratory failure than those with private insurance (adjusted OR 0.55 95% CI 0.52-0.57), reported Anuj Mehta, of the University of Colorado School of Medicine in Denver, and colleagues.