Table 3 Factors influencing the ACR50 response: results are shown for univariate analysis.
| Variables | ACR50 response No (%) | Univariate analysis OR (95% CI) | p Value |
|---|---|---|---|
| Age (years) | – | 0.99 (0.99 to 1.04) | NS |
| Sex (female/male) | 19 (43)/13 (48) | 0.87 (0.34 to 2.3) | NS |
| Disease duration (years) | – | 1.8 (0.8 to 4.1) | NS |
| SJC | – | 1.01 (0.9 to 1.03) | NS |
| Arthritis in: | |||
| Main large joints (knee and/or hip) | 14 (30) v 18 (78)† | 8.23 (2.54 to 26.6) | <0.001 |
| Knee joints | 12 (30) v 20 (61)† | 3.58 (1.36 to 9.49) | 0.009 |
| Hip joints | 4 (40) v 28 (48)† | 0.73 (0.19 to 2.89) | NS |
| CRP (>10 mg/l) | 23 (52) v 7 (39)† | 1.72 (0.56 to 5.26) | NS |
| ESR (⩾30 mm/1st h) | 19 (46) v 12 (48)† | 0.89 (0.39 to 2.90) | NS |
| Axial involvement* | 12 (60) v 19 (43)† | 0.51 (0.17 to 1.50) | NS |
| Erosive arthritis | 26 (53) v 6 (30)† | 2.6 (0.9 to 7.9) | NS |
| HAQ (⩾2) | 4 (27) v 28 (53)† | 3.1 (0.87 to 10.9) | 0.05 |
*Determined by radiological sacroiliitis; †results shown for response of patients with and without the variable listed.
SJC, swollen joint count; CRP, C reactive protein; ESR, erythrocyte sedimentation rate; HAQ, Health Assessment Questionnaire.