Table 1.
Participant demographics (mean ± SD)
| Group | Parti-cipants | Sex | Age, y | Height, cm | Mass, kg | BMI, kg/m2 | Time From ACL Injury to ACLR, d | Time to Test Post-ACLR,a d | Time From Test Post-ACLR to Secondary ACL,b d | Graft Type | Tegner Score | Meniscal Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ACLx0 | n = 7 | 5m,2f | 22.57 ± 3.3c | 176.78 ± 5.3 | 70.80 ± 6.0 | 22.66 ± 1.8 | NA | NA | NA | NA | 6.86 ± 1.95 | NA |
| ACLx1 | n = 7 | 5m,2f | 17.14 ± 2.7 | 182.87 ± 6.0 | 72.77 ± 6.8 | 21.8 ± 2.27 | 83.71 ± 60.9 | 230.71 ± 50.5 | NA | PT = 7 | 6.29 ± 1.89 | Repair: 1 No injury: 5 Mensicectomy: 1 |
| ACLx2 | n = 7 | 5m,2f | 16.00 ± 1.1 | 177.44 ± 3.6 | 70.49 ± 6.5 | 22.3 ± 1.59 | 50.86 ± 18.5 | 189.71 ± 10.7 | 490.29 ± 430.9 | PT = 7 | 6.14 ± 2.96 | Repair: 0 No injury: 6 Mensicectomy:1 |
ACL, anterior cruciate ligament; ACLR, anterior cruciate ligament reconstruction; ACLx0, no ACL injury group; ACLx1, single ACL injury group; ACLx2, double ACL injury group; BMI, body mass index; NA, not applicable; PT, patellar tendon.
a
Time to test post-ACLR is the time point when participants completed the hopping task for this investigation.
b
Time from test post-ACLR to secondary ACL injury is the time from study testing until the day they sustained a secondary ACL injury.
c
Different than the ACLx1 and ACLx2 groups.