Table 5.
Logistic regression analysis to generate odds ratios for being prescribed four or more root drugs during an 18-month period using data from normal and obese patients (combined) adjusted for all other factors.
| Odds ratio (95% CI) | P-value | |
|---|---|---|
| Age (years) | ||
| <35 | 1.0 (reference)a | |
| 35–44 | 1.05 (0.79 to 1.40) | 0.74 |
| 45–54 | 1.40 (1.05 to 1.84) | 0.02 |
| 55–64 | 2.10 (1.53 to 2.82) | <0.001 |
| 65+ | 3.33 (2.41 to 4.62) | <0.001 |
| Sex | ||
| Male | 1.0 (reference)a | |
| Female | 1.99 (1.64 to 2.41) | <0.001 |
| Deprivation category of practice address | ||
| Affluent | 1.0 (reference)a | |
| Intermediate | 1.57 (1.15 to 2.16) | <0.001 |
| Deprived | 1.90 (1.41 to 2.56) | <0.001 |
| Country | ||
| England | 1.0 (reference)a | |
| Scotland | 1.26 (0.93 to 1.52) | 0.07 |
| Any comorbidityb | ||
| No | 1.0 (reference)a | |
| Yes | 3.95 (3.25 to 4.79) | <0.001 |
| Body mass index | ||
| 18.5–25 | 1.0 (reference)a | |
| 30.00–34.99 | 1.55 (1.26 to 1.90) | < 0.001 |
| 35.00–39.99 | 1.84 (1.35 to 2.51) | < 0.001 |
| ≥40.00 | 2.53 (1.66 to 3.84) | < 0.001 |
a
Reference group <4 drugs.
b
See Supplementary Appendix 2. CI = confidence interval.