Table 1. Preoperative patient characteristics and intraoperative measurement values.
BMI, body mass index; FTA, femorotibial angle; K/L, Kellgren-Lawrence; ACL, anterior cruciate ligament
| Measurement values | Mean ± SD | Range (median) |
| Age (y) | 82 ± 9 | 59–98 (81.5) |
| Height (m) | 1.5 ± 0.1 | 1.35–1.72 (1.5) |
| Body weight (kg) | 60.5 ± 13.2 | 39.0–97.0 (58.0) |
| BMI (kg/m2) | 25.9 ± 5.4 | 17.3–45.5 (25.2) |
| FTA (°) | 183.9 ± 6.5 | 163.0–193.0 (185.0) |
| Preoperative extension (°) | -12.8 ± 10.7 | -45.0 to 0 (-10.0) |
| Preoperative flexion (°) | 120.5 ± 15.1 | 75.0–145.0 (120.0) |
| Extension component gap (mm) | 8.9 ± 1.2 | 7.5–13.3 (8.8) |
| Flexion component gap (mm) | 11.3 ± 2.2 | 8.5–18.3 (10.7) |
| Joint laxity (mm) | 1.4 ± 1.8 | -2.2 to 8.3 (1.03) |
| K/L classification (0/1/2/3/4) | 0/0/4/32/18 | - |
| Gross appearance of ACL (0/1/2/3) | 4/20/12/18 | - |
| Notch stenosis (0/1/2/3) | 15/28/10/1 | - |