Table 3 Annual/seasonal incidence of ACL injury in prospective cohort or controlled intervention studies in adolescent female football used for the sample size calculation.
Study | Population | Study design | Number of players in the control group | Number of players with ACL injury (%) |
|---|---|---|---|---|
Hewett et al., 1999 [15] | High school | Controlled trial | 193 | 2 (1.04%) |
Heidt et al., 2000 [14] | Age 14–18 years | Randomized controlled trial | 258 | 8 (3.10%) |
Powell & Barber-Foss, 2000 [24] | High school | Prospective cohort study | 6 642 | 33 (0.50%) |
Mandelbaum et al., 2005 [16] | Age 14–18 years | Controlled trial | 3 818 | 67 (1.76%) |
Pfeiffer et al. 2006 [17] | High school | Controlled trial | 189 | 0 |
Steffen et al., 2008 [19] | Age 13–17 years | Randomized controlled trial | 947 | 5 (0.53%) |