The Canadian Armed Forces aeromedical risk matrix risk applied to Pilot B
| Medical event class | ||||
| Incidence | 1 | 2 | 3 | 4 |
| Likely (>2%/y) | ||||
| Possible (>1–2%/y) | ||||
| Unlikely (>0.5–1%/y) | Acute injury | |||
| Highly unlikely (<0.5%/y) | Aseptic loosening | Deep infection | ||
Acute injury=combined incidence of dislocation and periprosthetic fracture. Risk matrix adapted from Grey et al.5