Kaplan-Meier curve of cumulative percentage of cardiac mortality by peak flow rate category (adjusted HRs (95% CI) compared with ≥550 L/min: (<430 L/min) 1.53 (1.04 to 2.25); (430 – <490 L/min) 1.43 (0.99 to 2.08); (490 – <550 L/min) 1.31 (0.93 to 1.86)). Kaplan-Meier curve of cumulative percentage of cardiac mortality by peak flow rate category (adjusted HRs (95% CI) compared with ≥550 L/min: (<430 L/min) 1.53 (1.04 to 2.25); (430 – <490 L/min) 1.43 (0.99 to 2.08); (490 – <550 L/min) 1.31 (0.93 to 1.86)). Tim C Clayton et al. Open Heart 2014;1:e000164 ©2014 by British Cardiovascular Society