Table 2.
VAS and WOMAC scores of the HA and ozone groups at the 6th month after injection
| Measure | Ozone therapy Before Mean ± SD |
After | Raw mean difference (SE) [95 % CI] |
HA therapy Before Mean ± SD |
After | Raw mean difference (SE) [95%CI] |
|---|---|---|---|---|---|---|
| VAS | 7.6±2.8 | 2.6±2.0 | −5.0 (0.2) [4.6–5.4] |
7.1±3.2 | 3.0±2.4 | −4.1(0.15) [3.8–4.4] |
| WOMAC Pain | 9.3±4.4 | 3.2±1.6 | −6.1 (0.2) [5.7–6.5] |
8.8±4.0 | 2.9±1.6 | −5.9 (0.2) [5.5–6.3] |
| WOMAC Stiffness | 2.3±2.4 | 1.1±1.6 | −1.2 (0.05) [1.1–1.3] |
2.1±1.6 | 1.1±0.8 | −1.0 (0.05) [0.9–1.1] |
| WOMAC Function | 29.2±7.0 | 16.1±4.2 | −13.1 (0.15) [12.8–13.4] |
27.6±6.6 | 13.1±3.2 | −14.5 (0.3) [13.9–15.1] |
| WOMAC Total | 40.8±9.0 | 20.4±5.0 | −20.4 (0.2) [20.0–20.8] |
38.5±8.0 | 17.1±4.2 | −21.4 (0.2) [21.0–21.8] |
Abbreviations: SE, standard error of mean; SD, standard deviation; CI, confidence interval; HA, hyaluronic acid; WOMAC, Western Ontario and McMaster Universities Arthritis Index; VAS, visual analog scale; OA, osteoarthritis; HA, hyaluronic acid.