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. 2015 Apr 15;191(8):894–901. doi: 10.1164/rccm.201409-1634OC

Figure 2.

Figure 2.

Adjusted odds of in-hospital mortality among patients receiving ECMO support when volume is modeled continuously, 1989–2013. Hospital ECMO volume is defined as the age group–specific number of patients treated with ECMO per year. The adjusted odds of death are presented relative to the lowest-volume hospitals in each age group. The dashed lines represent the upper and lower bounds of the 95% confidence intervals for the estimated volume-specific point estimates. When volume is modeled as a continuous variable the P values are as follows: (A) neonatal, P < 0.001; (B) pediatric, P = 0.006; and (C) adult, P < 0.001. ECMO = extracorporeal membrane oxygenation.