Rates of AEs, by site
| Hospital A | Hospital B | Hospital C | Hospital D | Hospital E | Total | |
| 246 | 235 | 243 | 313 | 122 | 1159 | |
| Triggers | ||||||
| N | 241 | 152 | 177 | 84 | 146 | 800 |
| Mean/patient±SD | 0.98±1.36 | 0.65±1.10 | 0.73±1.17 | 0.27±0.62 | 1.20±1.46 | 0.69±1.16 |
| Observations days | ||||||
| Sum (mean/patient) | 1901 (7.7) | 1789 (7.6) | 2660 (10.9) | 2662 (8.5) | 1342 (11.0) | 10 354 (8.9) |
| Events N | ||||||
| AE | 127 | 62 | 92 | 35 | 40 | 356 |
| Preventable AE | 99 | 40 | 82 | 31 | 37 | 289 |
| Non-preventable AE | 28 | 22 | 10 | 4 | 3 | 67 |
| Potential AE | 37 | 30 | 26 | 9 | 39 | 141 |
| Risk* N (%) | ||||||
| AE | 88 (35.8%) | 48 (20.4%) | 63 (25.9%) | 31 (9.9%) | 27 (22.1%) | 257 (22.2%) |
| Preventable AE | 73 (29.7%) | 33 (14.0%) | 60 (24.7%) | 31 (9.9%) | 26 (21.3%) | 223 (19.2%) |
| Non-preventable AE | 25 (10.2%) | 19 (8.1%) | 9 (3.7%) | 4 (1.3%) | 3 (2.5%) | 60 (5.2%) |
| Potential AE | 33 (13.4%) | 28 (11.9%) | 23 (9.5%) | 9 (2.9%) | 29 (23.8%) | 122 (10.5%) |
| Rate† (95% CI) | ||||||
| AE | 6.7 (5.2–8.4) | 3.5 (2.5–4.5) | 3.5 (2.5– 4.6) | 1.3 (0.8–1.8) | 3.0 (1.8–4.3) | 3.4 (3.0–3.9) |
| Preventable AE | 5.2 (4.0–6.6) | 2.2 (4.5–3.1) | 3.1 (2.2–4.1) | 1.2 (0.8–1.6) | 2.8 (1.7–4.0) | 2.8 (2.4–3.2) |
| Non-preventable AE | 1.5 (0.9–2.1) | 1.2 (0.6–1.8) | 0.4 (0.1–0.6) | 0.1 (0.0–0.3) | 0.2 (0.0–0.5) | 0.6 (0.5–0.8) |
| Potential AE | 1.9 (1.2–2.7) | 1.7 (1.1–2.3) | 1.0 (0.6–1.4) | 0.3 (0.1–0.6) | 2.9 (1.8–4.1) | 1.4 (1.1–1.6) |
*Risk, number of encounters with at least one event/Total number of encounters observed×100%.
†Rate, total number of events/total number of days observed×100.
AE, adverse event.