| 1994 (n = 932) | 1996 (n = 1025) | 2001 (n = 829) | 2004 (n = 914) | |
| NSAID, % | 45.2 | NA | 37.0 | 24.3 |
| Coxib, % | NA | NA | 15.2 | 35.0 |
| Analgesics, % | 25.1 | NA | 26.8 | 32.5 |
| Corticosteroids, % | 40.8 | 42.5 | 42.7 | 41.5 |
| DMARD, % | 36.5 | 39.5 | 47.8 | 51.8 |
| TNF-blocking agents, % | 0 | 0 | 3.1 | 11.8 |
Coxib, cyclo-oxygenase II inhibitors; DMARD, disease-modifying anti-rheumatic drug; NA, not assessed; NSAID, non-steroidal anti-inflammatory drug; TNF, tumour necrosis factor.