Table 1.
Demographic and baseline characteristics of the study and control groups
| Characteristics | Study group (n = 20) | Control group (n = 20) | p valuea |
|---|---|---|---|
| Number of male patients (%) | 2 (10) | 2 (10) | n.s. |
| Mean age ± SD (years) | 57.7 ± 5.3 | 58.8 ± 4.0 | n.s. |
| Mean BMI ± SD (kg/m2) | 29.1 ± 3.7 | 27.9 ± 4.2 | n.s. |
| Number of patients with bilateral osteoarthritis (%) | 17 (85) | 13 (65) | n.s.b |
| Number of left knees (%) | 10 (50) | 7 (35) | n.s.b |
| X-ray grade (Kellgren–Lawrence criteria) | n.s.b | ||
| Grade II (%) | 7 (35) | 8 (40) | |
| Grade III (%) | 13 (65) | 12 (60) | |
| Mean minimal JSW ± SD (mm) | 1.3 ± 1.0 | 1.6 ± 2.4 | n.s. |
| Mean joint range of motion ± SD (°) | 119.0 ± 12.6 | 124.5 ± 10.7 | n.s. |
| WOMAC score at the selection day | |||
| Pain (0–100) | 48.4 ± 15.6 | 46.6 ± 14.8 | n.s. |
| Stiffness (0–100) | 56.0 ± 26.7 | 55.8 ± 20.5 | n.s. |
| Physical function difficulty (0–100) | 53.6 ± 23.4 | 52.5 ± 16.7 | n.s. |
| Overall WOMAC (0–100) | 52.7 ± 21.2 | 51.5 ± 15.4 | n.s. |
JSW joint space width, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index, n.s. not significant
aIndependent t test
bChi square