Subgroups | Intervention group | Control group | ||
---|---|---|---|---|
IRR (95% CI) | P-value | IRR (95% CI) | P-value | |
Age group, years | ||||
27–42 | 0.92 (0.85 to 0.99) | 0.043 | 1.12 (1.04 to 1.21) | 0.004 |
43–48 | 0.78 (0.72 to 0.82) | <0.007 | 0.89 (0.84 to 0.95) | 0.001 |
49–52 | 0.81 (0.77 to 0.86) | <0.007 | 0.83 (0.77 to 0.90) | <0.007 |
53–56 | 0.81 (0.83 to 0.85) | <0.007 | 0.92 (0.86 to 0.98) | 0.006 |
57–68 | 0.77 (0.73 to 0.81) | <0.007 | 0.92 (0.87 to 0.97) | 0.003 |
Specialist | ||||
Non-specialist | 0.84 (0.77 to 0.93) | <0.007 | 1.04 (0.96 to 1.13) | 0.329 |
Specialist | 0.80 (0.78 to 0.82) | <0.007 | 0.91 (0.88 to 0.94) | <0.007 |
Type of practice | ||||
Single-handed | 0.75 (0.68 to 0.83) | <0.007 | 0.91 (0.83 to 0.99) | 0.034 |
Group | 0.80 (0.78 to 0.83) | <0.007 | 0.93 (0.90 to 0.96) | <0.007 |
Sex | ||||
Female | 0.85 (0.80 to 0.90) | <0.007 | 0.93 (0.88 to 0.99) | 0.027 |
Male | 0.79 (0.77 to 0.81) | <0.007 | 0.92 (0.89 to 0.95) | <0.007 |
Practice setting | ||||
Rural | 0.80 (0.77 to 0.83) | <0.007 | 0.92 (0.88 to 0.96) | <0.007 |
Urban | 0.80 (0.78 to 0.83) | <0.007 | 0.93 (0.90 to 0.97) | <0.007 |
Mean PIPs per 100 prescriptions 1 year pre-intervention | ||||
≤1.6 | 0.88 (0.81 to 0.95) | 0.001 | 1.09 (1.00 to 1.18) | 0.041 |
1.7–2.0 | 0.83 (0.78 to 0.88) | <0.007 | 1.04 (0.97 to 1.12) | 0.265 |
2.1–2.3 | 0.81 (0.76 to 0.85) | <0.007 | 0.85 (0.80 to 0.90) | <0.007 |
2.4–2.9 | 0.74 (0.70 to 0.78) | <0.007 | 0.89 (0.84 to 0.93) | <0.007 |
>2.9 | 0.80 (0.76 to 0.83) | <0.007 | 0.89 (0.83 to 0.96) | 0.004 |
Prescriptions per patient in the 1 year pre-intervention period | ||||
<8.7 | 0.90 (0.83 to 0.98) | 0.016 | 1.16 (1.06 to 1.27) | 0.001 |
8.7–10.7 | 0.83 (0.77 to 0.88) | <0.007 | 0.87 (0.81 to 0.93) | <0.007 |
10.8–12.8 | 0.80 (0.76 to 0.84) | <0.007 | 0.95 (0.88 to 1.02) | 0.190 |
12.9–14.9 | 0.80 (0.76 to 0.84) | <0.007 | 0.92 (0.87 to 0.97) | 0.004 |
>14.9 | 0.77 (0.73 to 0.80) | <0.007 | 0.88 (0.83 to 0.93) | <0.007 |
IRR = incidence rate ratio.