Predictors of postoperative complications in elderly patients undergoing pulmonary lobectomy: a retrospective cohort study.

Major complications occurred in 73 patients (34.4%).

The multivariable model showed good discrimination (AUC = 0.712, 95% CI: 0.645-0.789) and calibration (Hosmer-Lemeshow p = 0.562).

A simple risk score assigning one point per predictor demonstrated comparable discrimination (AUC = 0.699, 95% CI: 0.634-0.738) and a stepwise increase in complication rates: 26.0% (score 1), 54.7% (score 2), and 63.6% (score 3).