Table 1.
Comparison of Study Group and Excluded Patients (n = 242).
| Variables | Study Group (n = 92) | Patients with Incomplete Data (n = 150) | P |
|---|---|---|---|
| Age at surgery, years, mean ± SD (range) | 31.4 ± 9.5 (15-51) | 34.0 ± 10.4 (14-58) | 0.0530 |
| Gender, male/female, n | 44/48 | 77/73 | 0.691 |
| Body mass index, kg/m2, mean ± SD (range) | 26.5 ± 4.3 (18.0-38.2)a | 27.7 ± 4.7 (18.1-43.0)b | 0.0498 |
| Worker’s compensation, n (%) | 6 (6.5) | 10 (6.7) | 0.595 |
| Multiple previous surgeries, n (%) | 33 (35.9) | 66 (44.4) | 0.228 |
| Total surface area of defect per knee, cm2, mean ± SD (range) | 6.9 ± 4.6 (0.6-27.5) | 7.5 ± 4.9 (1.0-29.9) | 0.3555 |
| Number of defects, mean ± SD | 1.6 ± 0.8 | 1.7 ± 0.9 | 0.4398 |
| Defect location, cm2, mean ± SD | |||
| Medial femoral condyle | 4.5 ± 2.2 (n = 24) | 5.2 ± 2.6 (n = 58) | 0.2524 |
| Lateral femoral condyle | 4.0 ± 2.4 (n = 16) | 4.3 ± 2.0 (n = 20) | 0.6865 |
| Patella | 4.5 ± 2.3 (n = 62) | 4.4 ± 2.5 (n = 94) | 0.7707 |
| Trochlea | 4.8 ± 3.2 (n = 37) | 4.9 ± 2.6 (n = 65) | 0.9075 |
| Tibia plateau | 1.0 ± 0.4 (n = 4) | 1.6 ± 0.9 (n = 2) | 0.2898 |
| Concomitant procedure, n (%) | 62 (67) | 91 (61) | 0.337 |
SD = standard deviation.
a
Data from 90 patients.
b
Data from 144 patients.