TABLE 4.
Number, Incidence Rate, and Relative Risk of Injuries During the Matched Period for the ACL and Control Groupsa
| Raw No. of Injuries (Rate per 1000 AEs) | Relative Risk (95% CI) | P Value | ||
|---|---|---|---|---|
| ACL Group | Control Group | |||
| Lower extremity injuries | 114 (16.77) | 132 (19.23) | 0.87 (0.55-1.40) | .57 |
| Time-loss lower extremity injuries | 62 (9.12) | 55 (8.01) | 1.02 (0.51-2.07) | .95 |
| Noncontact lower extremity injuries | 28 (4.12) | 14 (2.04) | 1.88 (0.59-5.94) | .28 |
| Muscle/tendon injuries | 30 (4.41) | 34 (4.95) | 0.60 (0.23-1.57) | .30 |
| Thigh injuries | 22 (3.23) | 26 (3.79) | 0.45 (0.13-1.56) | .21 |
| Hamstring injuries | 8 (1.17) | 18 (2.62) | 0.36 (0.10-1.22) | .10 |
| Knee injuries | 17 (2.50) | 10 (1.46) | 3.07 (0.67-14.12) | .15 |
| Overuse injuries | 5 (0.74) | 6 (0.87) | 0.57 (0.11-2.91) | .50 |
aACL, anterior cruciate ligament; AE, athletic exposure.