TABLE 2.

Comparison of Models for Identifying Attempts Based on Event Data in Test Dataset

Algorithm	Kappa	Sens	Spec	PPV	NPV
Attempt within six months
Ridge regression	0.13	0.64	0.78	0.11	0.98
Lasso regression	0.14	0.58	0.82	0.12	0.98
Elastic net	0.18	0.76	0.81	0.14	0.99
Unregularized logistic regression	0.17	0.67	0.82	0.14	0.98
Decision trees	0.14	0.30	0.92	0.14	0.97
Previous attempt	0.04	0.39	0.75	0.06	0.97
Attempt within 12 months
Ridge regression	0.15	0.70	0.78	0.12	0.98
Lasso regression	0.15	0.67	0.79	0.12	0.98
Elastic net	0.16	0.64	0.82	0.13	0.98
Unregularized logistic regression	0.13	0.52	0.83	0.12	0.98
Decision trees	0.14	0.28	0.93	0.14	0.97
Previous attempt	0.02	0.30	0.75	0.05	0.96
Attempt within 24 months
Ridge regression	0.16	0.76	0.76	0.13	0.99
Lasso regression	0.14	0.58	0.82	0.12	0.98
Elastic net	0.13	0.52	0.83	0.11	0.98
Unregularized logistic regression	0.13	0.52	0.83	0.12	0.98
Decision trees	0.17	0.70	0.81	0.13	0.98
Previous attempt	0.04	0.36	0.78	0.07	0.97