Table 1.
The demographic characteristics of the study.
| N = 1,119 | |
|---|---|
| Age, mean (SD) | 61.5 (8.72) |
| Female, n (%) | 698 (62.4%) |
| Male, n (%) | 421 (37.6%) |
| Race, n (%) | |
| White | 943 (84.3%) |
| Others | 176 (15.7%) |
| BMI (kg/m2), mean (SD) | 29.5 (4.68) |
| Injury, n (%) | 510 (45.5%) |
| Surgery, n (%) | 292 (26.0%) |
| Quadriceps strength, mean (SD) | 1.25 (0.46) |
| WOMAC, median (IQR) | 1 (0, 4) |
| Baseline Kellgren and Lawrence (K-L) grade, n (%) | |
| 0 | 186 (16.6%) |
| 1 | 338 (30.2%) |
| 2 | 327 (29.2%) |
| 3 | 269 (24.0%) |
| Baseline patellofemoral grind, n (%) | 161 (14.3%) |
| Baseline synovitis summary score, median (IQR) | |
| (Range 0–6) | 1 (1,2) |
| Frequent patellofemoral grind, n (%) | 113 (10.0%) |
| Synovitis worsening, n (%) | 298 (26.6%) |
BMI, body mass index; SD, standard deviation; IQR, interquartile range; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index.