Table 4.
Comparison of 2P-BS and physical examination for the association of RA and contributing factors on multivariable logistic regression (enter method)
| B | OR (95% C.I.) | p | B | OR (95% C.I.) | p | |
|---|---|---|---|---|---|---|
| 2P-BS | P/Ex | |||||
| Sex* | − 0.651 | 0.521 (0.150–1.809) | 0.305 | − 0.136 | 0.873 (0.291–2.616) | 0.808 |
| Age# | − 0.201 | 0.818 (0.586–1.141) | 0.237 | − 0.170 | 0.843 (0.622–1.144) | 0.273 |
| Duration of pain (years) | 0.151 | 1.163 (1.034–1.309) | 0.012 | 0.159 | 1.173 (1.045–1.316) | 0.007 |
| Tenosynovitis | 3.274 | 26.408 (5.057–137.901) | < 0.001 | 0.757 | 2.132 (0.763–5.955) | 0.149 |
| RF† | 1.217 | 3.378 (1.921–5.940) | < 0.001 | 1.156 | 3.177 (1.878–5.374) | < 0.001 |
| ACPA† | 2.241 | 9.402 (5.411–16.335) | < 0.001 | 2.326 | 10.237 (6.039–17.355) | < 0.001 |
| CRP‡ | 2.897 | 18.118 (4.753–69.066) | < 0.001 | 2.651 | 14.175 (4.015–50.039) | < 0.001 |
| ESR‡ | 1.115 | 3.173 (1.158–8.697) | < 0.001 | 1.280 | 3.598 (1.381–9.371) | 0.009 |
2P-BS two-phase bone scintigraphy, RA rheumatoid arthritis, OR Odds ratio, C.I. confidence interval, P/Ex physical examination, RF rheumatoid factor, ACPA anti-cyclic citrullinated protein antibody, CRP C-reactive protein, ESR estimated sedimentation rate
*Sex was divided into male and female
#Age was grouped into intervals of 10 years
†RF and ACPA were divided into negative with their normal references (≤ 15 IU/mL and < 25 U/mL respectively), low-positive (higher than the upper normal reference but ≤ 3 times), and high-positive (> 3 times the upper normal reference)
‡CRP and ESR were into normal when their values were within their normal ranges (≤ 0.8 mg/dL and 20 mm/h respectively). Higher values than the normal ranges were defined as abnormal