Descriptive statistics
| Indicator | Number of hospitals | Median cases (range) | Median N (range) | Median outcome % (range) |
| Nosocomial pressure ulcer prevalence | 93 | 10 (0–39) | 233 (59–548) | 3.7 (0–11.1) |
| Nosocomial pressure ulcer incidence after total hip replacement | 90 | 2 (0–23) | 197 (26–1131) | 1.1 (0–8.9) |
| Leakage of the bile duct within 30 days of cholecystectomy | 95 | 2 (0–7) | 255 (109–625) | 0.5 (0–3.63) |
| Unintended reoperation after colorectal surgery | 94 | 15 (0–47) | 209 (57–557) | 6.9 (0–18.4) |
| In-hospital mortality after AMI, age <65 years | 88 | 1 (0–17) | 85.5 (4–720) | 1.1 (0–6.8) |
| In-hospital mortality after AMI, age ≥65 years | 88 | 10 (0–46) | 117.5 (28–541) | 8.6 (0–20.8) |
| Readmission after heart failure, age <75 years | 93 | 6 (0–30) | 77 (13–389) | 7.9 (0–22.6) |
| Readmission after heart failure, age ≥75 years | 93 | 10 (0–50) | 133 (13–376) | 8.0 (0–23.1) |
| Remaining cancer tissue after breast-saving lumpectomy | 94 | 7 (1–46) | 76 (14–300) | 10.5 (1.2–35.7) |
AMI, acute myocardial infarction.