| Study | Reason for exclusion |
|---|---|
| Bottiglieri 2002 | No randomised controlled trial (review) |
| Caroli 1980 | Only active control intervention (aspirin). Additional description: RCT |
| Ceccato 1980 | Only active control intervention (ibuprofen). Additional description: RCT |
| Conis 2003 | Not a randomised controlled trial (review) |
| Cucinotta 1980 | Only active control intervention (ibuprofen). Additional description: RCT |
| Fagan 2002 | No randomised controlled trial (review) |
| Pellegrini 1980 | Only active control intervention (celecoxib). Additional description: RCT |
| Polli 1975 | Less than 50% of patients had osteoarthritis and it was unclear whether the study was a randomised controlled trial |
| Schardt 2003 | Not a randomised controlled trial (review) |
| Schoenhals 2005 | Not a randomised controlled trial (review) |
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