Table IV.

Baseline predictors of using multiple pharmacies to fill prescriptions during calendar year 2005 among patients enrolled in the Pharmaceutical Assistance Contract for the Elderly (PACE) pharmacy benefit program and those whose primary pharmacy was among the top 5 pharmacies in Pennsylvania, using a primary pharmacy model^*.

	All PACE patients (N = 182,116).		Patients whose primary pharmacy was among the top 5 pharmacies in Pennsylvania (N =75,413).
	Univariate	Multivariate	Univariate	Multivariate
		C statistic = 0.595		C statistic = 0.597
		Pseudo R2 = 0.0291		Pseudo R2 = 0.0304
	Odds ratio (95% CI)
Baseline covariates assessed in 2004
Age on January 1, 2005, y
65–74	Reference	Reference	Reference	Reference
75–84	0.96 (0.94–0.99)	0.99 (0.96–1.01)	0.92 (0.88–0.96)	0.95 (0.92–0.99)
≥85	1.05 (1.02–1.09)	1.09 (1.06–1.13)	0.90 (0.86–0.95)	0.95 (0.91–1.00)
Female	1.06 (1.03–1.09)	1.00 (1.00–1.00)	1.05 (1.00–1.09)	1.00 (1.00–1.00)
White race	0.64 (0.61–0.66)	1.00 (1.00–1.00)	0.64 (0.61–0.67)	1.00 (1.00–1.00)
Residing in an urban zip code
	1.27 (1.24–1.30)	1.00 (1.00–1.00)	1.34 (1.30–1.39)	1.00 (1.00–1.00)
Unique medications in 2004
≤5	Reference	Reference	Reference	Reference
6–9	0.70 (0.68–0.71)	1.01 (0.98–1.05)	0.75 (0.72–0.79)	1.03 (0.98–1.08)
10–14	0.83 (0.80–0.85)	1.36 (1.30–1.42)	0.90 (0.86–0.95)	1.39 (1.31–1.48)
≥15 Medications	1.10 (1.06–1.14)	1.92 (1.82–2.03)	1.25 (1.19–1.33)	2.07 (1.91–2.24)
Prescriptions filled in 2004
<25	Reference	Reference	Reference	Reference
25–49	0.55 (0.54–0.57)	0.51 (0.49–0.53)	0.57 (0.54–0.59)	0.52 (0.50–0.55)
49–74	0.62 (0.60–0.64)	0.50 (0.48–0.52)	0.64 (0.61–0.67)	0.52 (0.49–0.55)
≥75	0.71 (0.69–0.74)	0.47 (0.45–0.49)	0.73 (0.69–0.77)	0.48 (0.44–0.51)

^*Includes only data available to the primary pharmacy.