Preoperative exercise capacity as a predictor of postoperative pulmonary complications in patients with esophageal cancer: a multicenter observational cohort study

Study limitation reported by the research below: “The 'practice changing' impact flag reflects a statistically significant improvement in NRI/IDI, but the AUC gain was modest (0.775 to 0.786); clinical magnitude should be interpreted cautiously. The complete-case analysis did not reach significance for NRI.”