TABLE 2.

C-statistics from Models Predicting High Statin Adherence (PDC ≥ 80%) Including Different Sets of Patient Baseline Information in the Testing Cohort

Variables Included in Each Model	C-statistics (95% CI)
Demographics (age, sex)	0.578(0.573-0.584)
Health services use (number of physician visits, colonoscopy, mammography, vaccinations, and hospitalized days)	0.549(0.543-0.554)
Comorbidities (PVD, liver disease, renal disease, recent MI, previous stroke, ischemic heart disease, HTN, DM, depression, cancer)	0.540(0.535-0.545)
Baseline medication use	0.545(0.539-0.551)
Index statin information (high-/low-intensity dose, dispensed days supply)	0.543(0.538-0.547)
Medication burden (number of any drug dispensations, of unique drugs, and of concurrent medication dispensed)	0.614(0.609-0.619)
Plan benefit type and financial burden (total copayment during baseline, copay of the index statin)	0.575(0.570-0.581)
All components combined	0.665(0.659-0.670)

c-statistics = concordance statistics; CI = confidence interval; DM = diabetes mellitus; HTN = hypertension; MI = myocardial infarction; PDC = proportion of days covered; PVD = peripheral vascular diseases.