Table 5.
Predictors of Overdose and Double-Dipping with Acetaminophen-Containing Products
| Variable | Overdose | Double-Dipping | ||||
|---|---|---|---|---|---|---|
| RR | 95 % CI | P Value | RR | 95 % CI | P Value | |
| Literacy | ||||||
| Adequate | 1.00 | 1.00 | ||||
| Limited | 1.65 | 1.03–2.66 | 0.04 | 1.23 | 0.90–1.68 | 0.19 |
| Age (years) | 1.00 | 0.99–1.02 | 0.45 | 1.00 | 0.99–1.01 | 0.61 |
| Female | 1.02 | 0.72–1.45 | 0.90 | 0.64 | 0.49–0.83 | 0.001 |
| Race | ||||||
| White | 1.00 | 1.00 | ||||
| Black | 0.46 | 0.28–0.76 | 0.002 | 1.36 | 0.86–2.15 | 0.19 |
| Other | 0.68 | 0.33–1.42 | 0.31 | 1.25 | 0.67–2.33 | 0.48 |
| Household Income | ||||||
| >$50,000 | 1.00 | 1.00 | ||||
| $20,000–$50,000 | 1.00 | 0.60–1.65 | 0.99 | 1.46 | 0.84–2.53 | 0.18 |
| <$20,000 | 0.91 | 0.49–1.68 | 0.75 | 1.96 | 1.03–3.72 | 0.04 |
| Acetaminophen Use | ||||||
| No use | 1.00 | 1.00 | ||||
| Moderate | 0.83 | 0.56–1.24 | 0.37 | 1.16 | 0.86–1.58 | 0.33 |
| Heavy | 1.70 | 1.10–2.64 | 0.02 | 1.42 | 1.02–1.98 | 0.04 |
| Clinic Type | ||||||
| Academic | 1.00 | 1.00 | ||||
| Community | 1.81 | 1.05–3.11 | 0.03 | 1.13 | 0.67–1.89 | 0.65 |