Table 5.
Results of univariate and multivariate linear regression analysis for OC Z-score
| Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|
| B (95% CI) | p value | B (95% CI) | p value | |
| Age (years)a | 0.008 (−0.011–0.027) | 0.409 | −0.018 (−0.034–−0.001) | 0.036 |
| Genderb | −0.687 (−1.129–−0.244) | 0.003 | −0.607 (−0.999–−0.214) | 0.003 |
| Disease duration (years)a | 0.007 (−0.012–0.026) | 0.460 | –e | |
| BASDAI (range 0–10)c | −0.029 (−0.155–0.098) | 0.655 | –e | |
| ESR (mm/h)c | 0.006 (−0.005–0.018) | 0.284 | –d | |
| CRP (mg/L)c | 0.009 (−0.003–0.022) | 0.130 | –d | |
| ASDASc | 0.052 (−0.222–0.326) | 0.708 | –e | |
| BASFI (range 0–10)c | 0.035 (−0.071–0.141) | 0.651 | –e | |
| PINP Z-scorec | 0.605 (0.453–0.756) | 0.000 | 0.464 (0.282–0.646) | 0.000 |
| sCTX Z-scorec | 0.464 (0.346–0.582) | 0.000 | 0.243 (0.110–0.377) | 0.000 |
| 25OHvitD (nmol/L)c | −0.007 (−0.016–0.001) | 0.076 | ||
See Table 1 for definitions
B refers to the influence on OC Z-score
aPer year
bIf gender is male (versus female)
cPer 1 grade or 1 point
dThe variable was not selected during multivariate regression analysis
eThe variable was not tested in multivariate regression analysis because of a p value>0.3 in univariate regression analysis, no significant correlation with OC Z-score, and no significant difference between men and women