Participant characteristics in those with and without OA at the 5-year to 10-year follow-up (mean (SD) unless indicated)
| Outcome | No OA (n=34); mean (SD) | OA (n=36); mean (SD) | p Value |
|---|---|---|---|
| Sex (n; male:female) | 21:13 | 21:15 | 0.770 |
| Age at surgery (years) | 31 (9) | 37 (10) | 0.006 |
| Age at follow-up (years) | 38 (10) | 45 (10) | 0.006 |
| Surgery to follow-up (years) | 7 (2) | 8 (2) | 0.505 |
| Height (m) | 1.72 (0.90) | 1.76 (0.10) | 0.093 |
| Weight (kg) | 77 (16) | 83 (16) | 0.124 |
| Tegner median (range)* | 5 (3–9) | 4 (3–9) | 0.023 |
| Anteroposterior laxity (mm)† | 8 (3) | 8 (3) | 0.655 |
| Flexion ROM (°) | 133.7 (7.1) | 131.0 (8.6) | 0.184 |
| Extension ROM deficit (°) | 0.1 (2.8) | 0.5 (2.4) | 0.629 |
*Mann-Whitney U test.
†measured with KT-1000 arthrometer at 30 pounds of pressure.
OA, osteoarthritis (either patellofemoral or tibiofemoral); ROM, range of movement.