Table 1.
Possible associated factors.
| Associated factor | Sydney Roosters series | FC Barcelona series |
|---|---|---|
| Chance | A factor, but unlikely to fully explain the cluster | A factor, but unlikely to fully explain the cluster |
| Past injury history of players | Not a relevant factor | A factor for 2/4 players |
| Player boot selection | Not apparently relevant as different boots used, although 3/4 players used blade configuration boots. | Not apparently relevant as different boots used |
| Specific preventive training | Players had only done their usual training program | Players had undertaken a specific program designed to prevent ACL injuries |
| Ground of injuries | Away | Home |
| Time of injury (in game) | 2/4 were early in the first half | 3/4 were early in the first half |
| Timing of injuries (in season) | Mid-season | 3/4 were early in the season after players had undergone limited pre-season preparation |
| Playing surface | Newly laid bermudagrass squares, of apparently poor quality installation (uneven, heavily sand topdressed) | Newly laid Kentucky bluegrass/ryegrass squares of apparently good quality; traction 48 Nm. |