Table I.
Comparison of demographic data as well as VAS, Lequesne and WOMAC scores at baseline between the Ozone and Control groups.
| Parameter | Ozone group (n=42) | Control group (n=38) | P-value |
|---|---|---|---|
| Agea (± SD) | 68.83±5.56 | 69.63±4.96 | 0.502 |
| Median (range) | 69 (60–79) | 71 (60–77) | |
| Sexb | 0.408 | ||
| Male | 17 (40.5) | 12 (31.6) | |
| Female | 25 (59.5) | 26 (68.4) | |
| Kneeb | 0.888 | ||
| Right | 27 (64.3) | 25 (65.8) | |
| Left | 15 (35.7) | 13 (34.2) | |
| Knee OA gradeb | 0.866 | ||
| Grade II | 24 (57.1) | 21 (55.3) | |
| Grade III | 18 (42.9) | 17 (44.7) | |
| VAS (initial)a | 7.52±1.57 | 7.66±1.32 | 0.682 |
| Lequesne (initial)a | 15.07±3.82 | 14.26±2.64 | 0.280 |
| WOMAC (initial)a | |||
| Pain | 12.36±2.79 | 13.55±3.45 | 0.091 |
| Stiffness | 2.95±1.75 | 3.32±2.04 | 0.394 |
| Physical function | 55.12±6.99 | 57.45±6.16 | 0.120 |
| Total | 70.43±8.37 | 73.68±10.07 | 0.119 |
a
Independent-samples t-test
b
Pearson's Chi-square test. Values are expressed as n (%) or the mean ± standard deviation. WOMAC, Western Ontario and McMaster Universities OA Index; VAS, Visual Analogue Scale; OA, osteoarthritis.