Fig. 4From: Helicopter inter-hospital transfer for patients undergoing extracorporeal membrane oxygenation: a retrospective 12-year analysis of a service systemOdds ratios for 28-day survival shown with regression coefficients (blue circle) and corresponding 95% confidence limits (lines). The variables daytime, veno-venous extracorporeal membrane oxygenation (ECMO) and male sex are reference groupsBack to article page