Table 8.

Stratified Analysis by Case Urgency: Elective vs Non-Elective Cases

Model	AUC (95% CI)	Sensitivity	Specificity
Preoperative intuition data alone
Elective case (n = 87)	0.708 (0.490-0.926)	N/A	N/A
Urgent or emergent case (n = 129)	0.652 (0.564-0.739)	0.576	0.727
Preoperative intuition data and clinical data*
Elective case (n = 87)	0.885 (0.802-0.967)	0.987	0.125
Urgent or emergent case (n = 129)	0.815 (0.742-0.888)	0.821	0.512

^*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