Relationship between the mean of actually measured and predicted postoperative oxygen uptake (ppo V̇O2peak as % of predicted), and the difference between the actually measured V̇O2peakand ppo V̇O2peak with 95% CI (1.96 SD). Relationship between the mean of actually measured and predicted postoperative oxygen uptake (ppo V̇O2peak as % of predicted), and the difference between the actually measured V̇O2peakand ppo V̇O2peak with 95% CI (1.96 SD). Elisabeth Edvardsen et al. BMJ Open Sport Exerc Med 2015;1:e000032 ©2015 by BMJ Publishing Group Ltd