| Category of patient safety | No. of items on each checklist | ||
| Hospital 1 | Hospital 2 | Hospital 3 and 4 | |
| Environmental | 38 | 8 | 1 |
| Medication | 3 | 6 | |
| Procedures | 3 | ||
| Staffing | 2 | 1 | |
| Infection | 11 | 3 | |
| Laboratory | 3 | ||
| Error reporting | 5 | ||
| Knowledge of protocols, equipment | 25 | ||
| Communication and teamwork | 4 | ||
| Other | 6 | 5 | 3 |