Characteristic	Estimated proportion of patients (95% CI)	Odds ratio (95% CI)
Intervention status
Pre‐intervention	19.1% (18.6–19.5%)	1
Post‐intervention	27.3% (26.7–27.9%)	1.88 (1.42–2.50)
Time point
T0	22.8% (22.1–23.5%)	1
T1	14.0% (13.4–14.5%)	0.59 (0.51–0.67)
T2	25.6% (24.8–26.4%)	1.32 (0.97–1.81)
T3	33.7% (32.7–34.7%)	2.31 (1.64–13.3)
Practice size (FTE GPs)
< 4	30.2% (29.8–30.7%)	1
≥ 4	4.0% (3.9–4.2%)	0.12 (0.09–0.16)
Intervention group
Early	18.5% (17.8–19.2%)	1
Late	24.7% (24.3–25.1%)	4.84 (2.95–7.93)
Area
1	37.8% (36.9–38.7%)	1
2	7.5% (7.0–8.0%)	0.09 (0.04–0.19)
3	20.8% (20.4–21.2%)	0.20 (0.15–0.25)

CI = confidence interval; FTE = full‐time equivalent positions.

The steps in the building of model 1 are reported in the Supporting Information, part E; estimates of differences in proportions, by variable, and by variable and area in Supporting Information, part F.