Adjusted trends in predicted hospital admission rates before, during and after the Safe At Home scheme in intervention and control areas
| Time point | Predicted injury hospital admission rate per 100 000 per month and 95% CI* | Difference in Trends*† | |
| Control areas | Intervention areas | ||
| Baseline period | |||
| January 2004 | 115.1 (112.5–117.7) | 125.3 (122.7–128.1) | |
| March 2009 | 118.0 (115.8–120.3) | 131.2 (128.7–133.6) | |
| Change in rate per month (%)‡ | 0.04 (−0.02–0.10) P=0.16 | 0.07 (0.02–0.13) P=0.009 | 0.03 (−0.05–0.11) P=0.42 |
| Implementation period | |||
| April 2009 | 118.15 (116.0–120.3) | 131.63 (129.3–134.0) | |
| March 2011 | 121.01 (118.2–123.9) | 143.24 (140.0–146.5) | |
| Change in rate per month (%)‡ | 0.10 (−0.03–0.24) P=0.14 | 0.37 (0.23–0.50) P<0.001 | 0.26 (0.07–0.46) P=0.007 |
| First postintervention period | |||
| April 2011 | 121.1 (118.4–123.8) | 142.8 (139.7–145.9) | |
| March 2013 | 122.2 (119.5–125.0) | 132.4 (129.5–135.4) | |
| Change in rate per month (%)‡ | 0.04 (−0.11–0.19) P=0.59 | −0.33 (−0.47 to −0.18) P<0.001 | −0.37 (−0.58 to −0.16) P=0.001 |
| Second postintervention period | |||
| April 2013 | 122.0 (119.4–124.6) | 132.3 (129.5–135.1) | |
| December 2015 | 114.10 (110.9–117.4) | 127.2 (123.7–130.8) | |
| Change in rate per month (%)‡ | −0.21 (−0.34 to −0.08) P=0.002 | −0.12 (−0.25–0.01) P=0.06 | 0.09 (−0.09–0.27) P=0.35 |
*Across all time points, within each time period.
†The difference in trends is the difference between the change in rate in intervention areas and the change in rates in the control areas.
‡The change in rate per month is derived from the incidence rate ratio and reflects the percentage change in the injury rate per month.