Participant characteristics at 1 and 5 years post-ACLR*
| Participants at 1 year post-ACLR (n=81) | Participants at 5 years post-ACLR (n=81) | |
| Age, median±IQR years | 28±14 | 32±14 |
| Male sex, no. (%) | 50 (62) | 50 (62) |
| Body mass index, median±IQR kg/m2 | 25.7±4.2 | 26.4±5.0 |
| Preinjury activity level 1 sport†, no. (%) | 56 (69) | 56 (69) |
| Time injury to surgery, median±IQR weeks | 14±20 | 14±20 |
| Combined injury,‡ no. (%) | 40 (49) | 46 (57) |
| New knee injuries, no. (%) | 0 (0)§ | 16 (20) |
| ACLR limb¶ | 0 (0)§ | 10 (11) |
| Contralateral limb** | 0 (0)§ | 6 (7) |
| Returned to level 1 sports,† no. (%) | 20 (25) | 26 (32) |
| Radiographic OA, no. (%)†† | 5 (6) | 15 (19) |
| Patellofemoral | 4 (5) | 14 (18) |
| Tibiofemoral | 2 (3) | 6 (8) |
*Participant demographics of n=81 completed PROs at 1 and 5 years.
†Level 1 sport=jumping, cutting pivoting as per Sports Activity Classification based on the study by Grindem et al.29
‡Participants were defined as a combined injury at 1 and 5 years if they had a significant cartilage defect30 and/or meniscectomy assessed/performed at the time of ACLR. Those who had a secondary injury/surgery to the index knee between 1 and 5 years follow-up were added to the combined injury group at 5 years.
§No new knee injuries were reported at 1 year as this was an exclusion criterion at baseline.
¶5-year new ACLR limb knee injuries/surgery n=10 (n=3 ACLR revision, n=6 meniscectomy, n=1 lateral collateral ligament sprain).
**5-year new contralateral limb knee injuries/surgery n=6 (combined: n=2 ACLR, n=1 meniscectomy, isolated: n=1 ACLR, n=1 meniscectomy, n=1 lateral collateral sprain).
††n=78 completed X-ray evaluation at 1 and 5 years, demographics of these participants have been reported previously.7