Description of participant characteristics (n=146)
| Characteristic | No MRI OA n=122 | MRI OA n=24 |
| Sex (count, % female) | 76 (62.2) | 14 (58.3) |
| Age (years; median, range) | 23 (15–27) | 23 (18–27) |
| BMI (kg/m2; median, range) | 24.2 (18.5–36.0) | 25.8 (21.3–38.9) |
| Previous injury (count, %) | 52 (42.6) | 21 (87.5) |
| Age at injury (years; median, range) | 15 (11–18) | 16 (14–18) |
| Time from injury (years; median, range) | 7.0 (3.7–10.0) | 6.8 (4.0–9.5) |
| Index knee surgery (count, %) | 29 (23.8) | 17 (70.8) |
| ACL tear* (count, %) | 24 (19.6) | 15 (62.5) |
| Meniscal injury (count, %) | 25 (20.5) | 16 (66.7) |
| Contralateral knee injury (count, %) | 11 (9.0) | 6 (25.0) |
*All were surgically reconstructed.
BMI, body mass index; OA, osteoarthritis.