Predictor | Univariate (odds ratios) | Best fit (odds ratios) | |||
---|---|---|---|---|---|
Estimated (95% CI), P value | Overall P value | Estimated (95% CI), P value | Overall P value | ||
Year |
2010/2011^{*}
2011/2012 2012/2013 |
- 0.991 (0.988–0.995), P < 0.001 1.006 (1.003–1.010), P < 0.001 | P < 0.001 |
- 0.998 (0.994–1.001), P = 0.164 1.012 (1.008–1.015), P < 0.001 | P < 0.001 |
Practice population: % in top 15% most deprived |
None^{*}
<5% 5–15% 15–25% 25–50% >50% |
- 0.968 (0.954–0.982), P < 0.001 0.894 (0.865–0.924), P < 0.001 0.894 (0.863–0.926), P < 0.001 0.832 (0.800–0.864), P < 0.001 0.854 (0.816–0.895), P < 0.001 | P < 0.001 |
- 0.980 (0.966–0.995), P = 0.007 0.940 (0.912–0.970), P < 0.001 0.912 (0.882–0.942), P < 0.001 0.862 (0.832–0.893), P < 0.001 0.837 (0.802–0.873), P < 0.001 | P < 0.001 |
Practice population: mean age |
<40^{*}
40–41 ≥42 |
- 1.037 (0.988–1.088), P = 0.138 1.117 (1.064–1.173), P < 0.001 | P < 0.001 | removed during backward stepwise regression | |
Practice population: list size |
<5000^{*}
5–10,000 ≥10,000 |
- 0.882 (0.847–0.918), P < 0.001 0.881 (0.822–0.945), P < 0.001 | P < 0.001 |
- 0.913 (0.881–0.947), P < 0.001 0.918 (0.863–0.975), P = 0.006 | P = 0.003 |
Practice population: patients per GP |
<1000^{*}
1000–1500 ≥1500 |
- 0.951 (0.910–0.995), P = 0.028 0.920 (0.873–0.970), P = 0.002 | P = 0.005 | removed during backward stepwise regression | |
Practice GPs: number of GPs |
1^{*}
2–3 4–6 ≥7 |
- 0.999 (0.916–1.090), P = 0.983 0.949 (0.870–1.035), P = 0.235 0.908 (0.831–0.992), P = 0.032 | P = 0.002 | removed during backward stepwise regression | |
Practice GPs: mean age |
≤44^{*}
45–49 ≥50 |
- 0.980 (0.936–1.027), P = 0.396 0.985 (0.936–1.036), P = 0.553 | P = 0.683 |
- 0.999 (0.961–1.039), P = 0.974 0.951 (0.910–0.993), P = 0.023 | P = 0.038 |
Practice: urban/rural |
Large urban Other urban Small town Rural |
-* 1.045 (0.996–1.096), P = 0.073 1.048 (0.986–1.114), P = 0.130 1.210 (1.149–1.275), P < 0.001 | P < 0.001 | removed during backward stepwise regression | |
Indicator: threshold increasing |
No^{*}
Yes |
- 0.617 (0.373–1.020), P = 0.060 | P = 0.060 | removed during backward stepwise regression |