Comparison of the risk of new hamstring strains between players who previously had sustained such an injury and players with no previous injury
| New hamstring injury | No hamstring injury | Total | |
|---|---|---|---|
| History of previous hamstring injury | 10 (13.5%) | 64 | 74 |
| No previous hamstring injury | 9 (2.0%) | 433 | 442 |
| Total | 19 | 497 | 516 |
Each leg was treated as a separate case. Adapted from figure 2 in Arnason et al.29