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Use of additional medication.
| Time (month) | ||||||
|---|---|---|---|---|---|---|
| 0 | 2 | 4 | 6 | 12 | ||
| Medication | ||||||
| NSAID, oral administration | HA | 9 | 8 | 7 | 7 | 5 |
| Placebo | 10 | 10 | 7 | 7 | 4 | |
| NSAID, external use | HA | 16 | 15 | 15 | 13 | 13 |
| Placebo | 18 | 17 | 17 | 14 | 13 | |
| HA, intra-articular injection | HA | 6 | 7 | 8 | 7 | 5 |
| Placebo | 8 | 6 | 7 | 7 | 6 | |
Numbers of subjects requiring respective treatments are shown.
NSAID: nonsteroidal anti-inflammatory drugs.
