Independent variables for the detection of inflammatory arthritis (IA) in the rheumatology triage setting.
| Measurement Estimate (95% CI) | Univariate OR | Model Multivariable Logistic Regression | ||
|---|---|---|---|---|
| Derivation Model | Bootstrap Aggregating Model* | |||
| ß coefficient | ß coefficient | OR | ||
| Intercept | — | 3.72 (1.49–5.94) | 3.74 (−0.48–7.98) | — |
| Age | 13.70† (7.37–20.04) | −0.07 (−0.11–−0.03) | −0.083 (−0.086–−0.080) | 0.92 (0.920–0.924) |
| Male | 1.88 (0.75–4.68) | 0.68 (−0.03–1.39) | 0.79 (0.73–0.85) | 4.81 (4.26–5.42) |
| IA detection tool item | ||||
| 1. joint pain general | 0.63 (0.18–2.17) | — | — | — |
| 2. hand/wrist pain | 2.06 (0.73–5.85) | — | — | — |
| 3. hand/wrist swelling | 3.40 (1.43–8.08) | — | — | — |
| 4. trouble making a fist | 3.34 (1.46–7.68) | 0.69 (0.10–1.29) | 0.78 (0.73–0.83) | 4.73 (4.29–5.22) |
| 5. morning stiffness general | 2.83 (0.80–10.05) | 0.76 (−0.18–1.69) | 1.29 (−2.93–5.52) | 13 (0–62000) |
| 6. morning stiffness > 1 h | 3.19 (1.38–7.35) | — | — | — |
| 7. symmetry | 2.21 (0.93–5.25) | — | — | — |
| 8. functional difficulty | 1.08 (0.42–2.79) | — | — | — |
| 9. ever told you have RA | 11.77 (4.47–30.97) | 1.46 (0.83–2.10) | 1.59 (1.53–1.64) | 23.94 (21.49–26.66) |
| 10. RA family history | 1.11 (0.47–2.63) | — | — | — |
| 11. psoriasis diagnosis | 4.41 (1.60–12.19) | 0.80 (0.07–1.53) | 0.88 (0.82–0.94) | 5.84 (5.16–6.62) |
| 12. 6–52 wk symptom duration | 1.35 (0.58–3.13) | — | — | — |