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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