TABLE 4.
Parsimonious Regression Models Explaining Difference in Performance Between East North Central and East South Central Regions
| Effect | PDC Diabetes | PDC Statins | HRM Use in Elderly | |||
|---|---|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | OR | 95% CI | |
| Regions | ||||||
| East North Central | reference | |||||
| East South Central | 0.78 | 0.60-1.01 | 0.98 | 0.84-1.16 | 0.98 | 0.87-1.10 |
| Store characteristics | ||||||
| Chain pharmacy | reference | |||||
| Independent pharmacy | 1.36 | 1.08-1.72 | 1.42 | 1.23-1.64 | 1.37 | 1.23-1.53 |
| County-level characteristics | ||||||
| High median income | 0.67 | 0.56-0.81 | 0.74 | 0.65-0.84 | 0.71 | 0.64-0.79 |
| High proportion of African-American population aged > 64 years | 2.48 | 2.04-3.03 | 2.08 | 1.83-2.37 | - | - |
| High proportion of population aged > 64 years who were > 84 years | 0.63 | 0.49-0.80 | 0.74 | 0.64-0.86 | 0.95 | 0.85-1.07 |
| High proportion of Hispanic population aged > 64 years | - | - | - | - | 0.57 | 0.49-0.65 |
| High proportion of urban population | - | - | - | - | 0.96 | 0.86-1.08 |
| Counties with HPSA for part of area | - | - | - | - | 0.78 | 0.67-0.90 |
| Counties with HPSA for entire area | - | - | - | - | 0.72 | 0.63-0.82 |
| R-square | 0.052 | 0.04 | 0.04 | |||
CI = confidence interval; HPSA = health professional shortage area; HRM = high-risk medication; OR = odds ratio; PDC = proportion of days covered; RASA = renin angiotensin receptor antagonist.