marginal significanceP = 0.044
Model 1 (adjusted for gender, age, BMI, history of radiotherapy, coronary heart disease, preoperative anemia): Preoperative disability remained a significant predictor (aOR = 4.65, 95% CI = 1.09–19.98, P = 0.038), with preoperative anemia (aOR = 3, P = 0.005) and coronary heart disease showing marginal significance (aOR = 2.14, P = 0.044) (Supplementary Table 1).