Table 2.
Logistic regression analysis of adherence defined as 6-month PDC of at least 80% after the mailed letter
| OR (95% CI) | P-value | |
|---|---|---|
|
| ||
| Language of letter | ||
| English | Reference | Reference |
| Spanish | 0.739 (0.383–1.426) | 0.368 |
| Age | ||
| Age, years | 0.994 (0.972–1.016) | 0.594 |
| Gender | ||
| Female | Reference | Reference |
| Male | 0.968 (0.615–1.524) | 0.888 |
| Ethnicity | ||
| White | Reference | Reference |
| Hispanic | 0.673 (0.323–1.402) | 0.291 |
| African-American | 1.008 (0.538–1.888) | 0.981 |
| Asian | 1.049 (0.185–5.937) | 0.957 |
| Region of Texas | ||
| Out of Texas | Reference | Reference |
| West | 1.359 (0.338–5.471) | 0.666 |
| East | 1.563 (0.401–6.091) | 0.520 |
| Low income subsidy eligibility | ||
| No | Reference | Reference |
| Yes | 1.189 (0.725–1.951) | 0.492 |
| Medication category | ||
| Statin | Reference | Reference |
| ACEI/ARB | 0.649 (0.396–1.061) | 0.085 |
| Oral antidiabetic | 0.777 (0.406–1.489) | 0.447 |
| Generic vs brand | ||
| Generic | Reference | Reference |
| Brand | 0.773 (0.262–2.281) | 0.641 |
| Day supply | ||
| 30 days or less | Reference | Reference |
| >30 days | 2.198 (1.307–3.696) | 0.003 |
| Copay | ||
| Copay, $ | 0.994 (0.973–1.016) | 0.587 |
| Pharmacy type | ||
| Retail | Reference | Reference |
| Mail order | 1.028 (0.254–4.159) | 0.969 |
| Initial PDC | ||
| PDC | 39.283 (2.764–558.363) | 0.007 |
Abbreviations: ACEI, angiotensin-converting enzyme inhibitor; ARB, angiotensin receptor blocker; PDC, proportion of days covered.