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6% vs 40.2%; P.001) and annual volume20 (47.2% vs 42.3%; P.001), which persisted in propensity matched analyses as well as Cox multivariable analysis (hazard ratio, 0.81; 95% confidence interval, 0.74-0.89; P.001 for facility volume6 and hazard ratio, 0.78; 95% confidence interval, 0.65-0.95; P=.01 for facility volume2. In Cox multivariable analysis that considered facility volume as a continuous variable, higher volume continued to be associated with better survival (hazard ratio, 0.93 per 5 cases; 95% CI, 0.9