Data on all critical incidents experienced and the index critical incident
| No | % | |
| Number of critical incidents experienced | 220 | |
| None | 7 | 3% |
| 1–5 | 145 | 66% |
| 6–10 | 21 | 10% |
| >10 | 47 | 21% |
| Types of index critical incident | 225 | |
| Still troubling | 119 | 53% |
| Troubled in the past | 86 | 38% |
| Difficult to isolate (compositae) | 4 | 2% |
| Worst call | 16 | 7% |
| Time elapsed since index critical incident | 201 | |
| <1 month | 12 | 6% |
| ≤6 months | 23 | 11% |
| 6 months–1 year | 18 | 9% |
| 1–5 years | 90 | 45% |
| 6–10 years | 27 | 13% |
| >10 year | 31 | 15% |