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Percentages and relative frequencies (in brackets) of patients taking NSAID/analgesic medication in each group of treatment and observation period.
| Therapy | Baseline | 1 mth | 6 mths | 12mths | 24 mths |
|---|---|---|---|---|---|
| Hyaluronic acid 1,500–3,200 kDa | 83.7% (36/43) |
53.5% (23/43) |
58.1% (25/43) |
38.9% (14/36) |
17.1% (6/35) |
| Hylan G-F 20 | 77.2% (61/79) | 57.0% (45/79) | 50.6% (40/79) |
44.2% (19/71) |
48.0% (12/70) |
| Controls | 75.0% (15/20) | 70.0% (14/20) | 85.0% (17/20) |
80.0% (16/20) |
90.0% (18/20) |
