Study sample characteristics
| Pre-intervention period | Post-intervention period | |
| Age (mean (SD)) | n=6693 | n=7307 |
| Overall | 58.6 (18.6) | 59.8 (18.8) |
| Intervention site | 57.3 (18.3) | 59.1 (18.6) |
| Control site 1 | 59.1 (18.7) | 60.1 (18.9) |
| Control site 2 | 59.2 (18.8) | 60.5 (19.1) |
| Control site 3 | 59.4 (18.2) | 59.5 (18.2) |
| Sex (% male) | ||
| Overall | 55.60% | 55.20% |
| Intervention site | 56.60% | 55.20% |
| Control site 1 | 54.10% | 56.00% |
| Control site 2 | 56.10% | 54.30% |
| Control site 3 | 55.90% | 54.70% |
| Charlson Comorbidity Index (median (IQR)) | ||
| Overall | 1 (2) | 1 (3) |
| Intervention site | 1 (2) | 1 (2) |
| Control unit 1 | 1 (3) | 1 (3) |
| Control unit 2 | 1 (3) | 1 (2) |
| Control unit 3 | 1 (3) | 1 (3) |
| Length of stay (median (IQR)) | ||
| Overall | 5.0 (6.9) | 5.0 (7.0) |
| Intervention site | 5.2 (7.1) | 5.2 (7.3) |
| Control unit 1 | 5.1 (7.0) | 5.7 (7.7) |
| Control unit 2 | 4.8 (6.3) | 4.4 (5.8) |
| Control unit 3 | 4.8 (6.4) | 4.6 (6.7) |