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Table 2 Comparisons of cross-validated models and NSQIP® surgical risk score for predicting postoperative outcomes in older patients

From: Self-reported mobility as a preoperative risk assessment tool in older surgical patients compared to the American College of Surgeons National Surgical Quality Improvement Program

Outcomes Model ROC AUC (95% CI) Estimate of difference (95% CI)* p value*
Postoperative complications MAT-sf only 0.643 (0.538–0.748) − 0.054 (− 0.227, 0.120) 0.54
Covariates only† 0.604 (0.496–0.711) − 0.093 (− 0.232, 0.046) 0.19
MAT-sf + covariates† 0.641 (0.529–0.753) − 0.056 (− 0.203, 0.092) 0.46
ACS NSQIP surgical risk score 0.697 (0.580–0.813)   
Nursing home placement MAT-sf only 0.723 (0.632–0.813) − 0.037 (− 0.167,0.094) 0.58
Covariates only† 0.653 (0.543–0.762) − 0.107 (− 0.238,0.024) 0.11
MAT-sf + covariates† 0.708 (0.596–0.821) − 0.051 (− 0.184, 0.081) 0.45
NSQIP surgical risk score 0.760 (0.640–0.880)   
  1. NSQIP® National Surgical Quality Improvement Program, AUC area under the curve, MAT-sf Mobility Assessment Test-short form, ROC receiver operator characteristic
  2. *Comparing each model to NSQIP surgical risk score
  3. †Covariates include age, gender, body mass index, ASA status, diabetes mellitus, hypertension, and surgical risk