TABLE 3.

Receiver operating characteristic curves evaluating 1, 2, and 3 predictor models for determining live birth.

Predictors	AUC
1 Predictor model
Age	0.617
O	0.582
1/O	0.582
P	0.533
2 Predictor model
Age
1/O	0.628
Age
O	0.623
Age
P	0.622
P/O	0.597
3 Predictor model
Age
P
1/O	0.637
Age
P/O	0.636
Age
P
O	0.630

Note: P/O was considered a 2 predictor model, because it incorporates both P and 1/O into the model.