Women’s elite football: overall, match and training IIRs (per 1000 hours of exposure) stratified by type of injury
| Description | Poisson regression meta-analysis | ||||||||
| Category | Injury definition | Injury type | Model | K | Summary incidence rate | 95% CI | χ 2 Wald | T2 | I2 |
| Overall | Time-loss | Fractures and bone stress | Random | 3 | 0.43 | 0.10 to 1.82 | 28.39 (p<0.001) | 1.38 | 87.45% |
| Overall | Time-loss | Joint and ligaments | Random | 3 | 2.62 | 1.26 to 5.46 | 32.65 (p<0.01) | 0.38 | 91.31% |
| Overall | Time-loss | Muscle and tendon | Random | 3 | 2.70 | 1.12 to 6.50 | 57.45 (p<0.001) | 0.568 | 94.35% |
| Overall | Time-loss | Contusion | Random | 3 | 0.76 | 0.55 to 1.03 | 2.51 (p=0.29) | 0.10 | 23.43% |
| Overall | Time-loss | Laceration and skin lesion | Random | 3 | 0.07 | 0.003 to 1.33 | 11.95 (p<0.01) | 4.62 | 84.51% |
| Overall | Time-loss | CNS/PNS | Random | 3 | 0.23 | 0.13 to 0.41 | 1.68 (p=0.43) | 0.05 | 21.62% |
| Overall | Time-loss | Other injuries | Random | 3 | 0.17 | 0.09 to 0.34 | 1.62 (p=0.44) | 0.08 | 26.79% |
| Match | Time-loss | Fractures and bone stress | Fixed | 2 | 0.13 | 0.02 to 0.94 | 0.01 (p=0.99) | NA | NA |
| Match | Time-loss | Joint and ligaments | Fixed | 2 | 5.31 | 3.89 to 7.23 | 0.13 (p=0.72) | NA | NA |
| Match | Time-loss | Muscle and tendon | Fixed | 2 | 3.32 | 2.24 to 4.91 | 0.19 (p=0.66) | NA | NA |
| Match | Time-loss | Contusion | Fixed | 2 | 3.45 | 2.35 to 5.06 | 0.04 (p=0.85) | NA | NA |
| Match | Time-loss | Laceration and skin lesion | Fixed | 2 | 0.13 | 0.02 to 0.94 | 0.01 (p=0.99) | NA | NA |
| Match | Time-loss | CNS/PNS | Fixed | 2 | 0.93 | 0.44 to 1.95 | 0.02 (p=0.89) | NA | NA |
| Match | Time-loss | Other injuries | Fixed | 2 | 0.53 | 0.19 to 1.40 | 0.01 (p=0.99) | NA | NA |
| Training | Time-loss | Fractures and bone stress | Fixed | 2 | 0.20 | 0.10 to 0.39 | 0.10 (p=0.75) | NA | NA |
| Training | Time-loss | Joint and ligaments | Fixed | 2 | 1.08 | 0.80 to 1.45 | 4.53 (p=0.03) | NA | NA |
| Training | Time-loss | Muscle and tendon | Fixed | 2 | 1.10 | 0.82 to 1.48 | 1.92 (p=0.17) | NA | NA |
| Training | Time-loss | Contusion | Fixed | 2 | 0.32 | 0.19 to 0.55 | 0.02 (p=0.90) | NA | NA |
| Training | Time-loss | Laceration and skin lesion | Fixed | 2 | NA* | NA* | NA | NA | NA |
| Training | Time-loss | CNS/PNS | Fixed | 2 | 0.10 | 0.04 to 0.26 | 0.20 (p=0.66) | NA | NA |
| Training | Time-loss | Other injuries | Fixed | 2 | 0.10 | 0.04 to 0.26 | 5.50 (p=0.02) | NA | NA |
T2, tau-squared estimate (ie, the variance of true IIRs) ; I2, I2 statistic (ie, the proportion of observed variation that is attributable to true, between-study variation).
*Zero events reported in studies included in this meta-analysis, thus yielding no summary effect estimate.
CNS, central nervous system; IIRs, injury incidence rates; NA, not available; PNS, peripheral nervous system.