Demographic features of patients whose samples were selected for microarray. Data shown are mean or percentage ± SD.
| Demographic Feature | Contracture Group, n = 6 | Noncontracture Group, n = 6 | p |
|---|---|---|---|
| Age, yrs | 69.7 ± 14.2 | 65.3 ± 8.1 | 0.49 |
| Female, % | 83.3 | 66.7 | 0.70 |
| White ethnicity, % | 100.0 | 100.0 | 1.00 |
| BMI, kg/m2 | 31.0 ± 3.6 | 28.1 ± 2.9 | 0.09 |
| Severity of OA (Kellgren and Lawrence) | Four 3s, Two 4s | Four 3s, Two 4s | 1.00 |
| Alignment deviation (varus or valgus) of surgical knee (°) | 9.7 (7.5) | 6.7 (4.1) | 0.59 |
| Extension limitation of surgical knee (°) | 11.3 ± 3.9 (range 8–18) | 1.0 ± 1.1 (range 0–2) | < 0.01 |
| Extension limitation of contralateral knee (°) | 5.7 ± 5.0 (range 0–12) | 1.0 ± 1.1 (range 0–2) | 0.09 |
| Percent collagen (trichrome stain, %) | 64.6 | 53.5 | 0.20 |
BMI: body mass index; OA: osteoarthritis.