Table 4.
Factors associated with prescribing in multivariable random-effect Poisson regression model
| Characteristic | IRR | 95% CI |
|---|---|---|
| Year | 1.04 | 1.02–1.05* |
| Black (vs. White race) | 0.86 | 0.80–0.92* |
| Hispanic/other | 1.00 | 0.89–1.13 |
| Duration of injury 10+ years (vs. <10 years) | 1.15 | 1.06–1.24* |
| Duration of injury unknown | 0.95 | 0.87–1.04 |
| Paraplegia (vs. tetraplegia) | 0.97 | 0.91–1.03 |
| Level of injury unknown | 0.70 | 0.60–0.82* |
| SCI center (vs. non-SCI center) | 0.89 | 0.83–0.95* |
| Pressure ulcer (vs. no pressure ulcer) | 1.14 | 1.06–1.23* |
| Number of infections | 3.00 | 2.85–3.16* |
| Midwest region (vs. Northeast) | 1.26 | 1.11–1.43* |
| West region | 1.22 | 1.08–1.37* |
| South region | 1.13 | 1.02–1.26* |
*Variables statistically significant at the <0.05 level.