Table 7.

Stratified Analysis by Role of Respondent: Attending Surgeon vs Trainee

Model	AUC (95% CI)	Sensitivity	Specificity
Preoperative intuition data alone
Surgical attendings (n = 108)	0.718 (0.637-0.800)	0.569	0.861
Surgical fellows and chief residents (n = 108)	0.564 (0.408-0.720)	N/A	N/A
Preoperative intuition data and clinical data*
Surgical attendings (n = 108)	0.860 (0.792-0.930)	0.889	0.543
Surgical fellows and chief residents (n = 108)	0.868 (0.771-0.965)	0.956	0.375

^*Subset of clinical data: age (continuous), sex (dichotomous), functional health status (ordinal), American Society of Anesthesiologists classification (ordinal), congestive heart failure within 30 days of operation (dichotomous), current smoker within 1 year (dichotomous) and history of severe COPD (dichotomous).

AUC, area under the receiver operating characteristic curve; N/A, not applicable