Win et al studied patients with lung cancer undergoing potentially curative resection. Two different outcomes were assessed: (1) a complicated postoperative course, which included heart failure, renal failure, pulmonary embolism, septicemia, pneumonia, respiratory failure, myocardial infarction, and postoperative death; and (2) poor outcome, defined as only the latter three complications. They found that V̇o2max as a percentage of predicted was a good indicator of the postoperative course, but that the absolute value of V̇o2max was not. A complicated course, poor outcome, and mortality were all more common in patients with a low V̇o2max as a percentage of predicted. Two of three patients with a V̇o2max < 50% of predicted died but, due to the small number of patients with a low V̇o2max who actually had surgery, a definite threshold recommendation cannot be made.