Table 2.
A logistic regression model of the OR of the increased serum level of interleukin-6.
| Covariates | Serum IL-6 ≥ 1.53 pg/mL | Serum IL-6 ≥ 6.64 pg/mL | ||
|---|---|---|---|---|
| OR (95% CI) | P | OR (95% CI) | P | |
| Ankylosing spondylitis | 2.04 (0.87–4.78) | 0.10 | 1.30 (0.6–2.77) | 0.51 |
| Psoriatic arthritis | 0.70 (0.32–1.51) | 0.36 | 0.86 (0.40–1.84) | 0.69 |
| SAPHO | 0.61 (0.23–1.65) | 0.33 | 0.82 (0.28–2.41) | 0.72 |
| CRP ≥ 5 mg/L | 7.68 (2.93–20.16) | <0.0001 | 15.76 (4.54–54.66) | <0.0001 |
| BASDAI ≥ 4 | 2.90 (1.16–7.25) | 0.02 | 1.11 (0.50–2.45) | 0.79 |
| NSAIDs | 1.15 (0.42–3.11) | 0.78 | 0.58 (0.20–1.65) | 0.31 |
| Sulfasalazine | 0.64 (0.29–1.39) | 0.26 | 1.07 (0.50–2.28) | 0.85 |
| Methotrexate | 1.71 (0.71–4.15) | 0.23 | 1.42 (0.65–3.11) | 0.38 |
IL-6: interleukin-6.
OR: odds ratio.
95% CI: 95% confidence interval.
NSAIDs: nonsteroidal anti-inflammatory drugs.