Table 5.
Multivariate linear regression analysis of the effect of serum 25(OH)D levels on JADAS-27
| Term | Estimate | Standard Error | 95% Confidence interval | p-value |
|---|---|---|---|---|
| Serum 25(OH)D (ng/ml) | 0.02 | 0.05 | −0.08, 0.12 | 0.67 |
| Age (years) | −0.01 | 0.13 | −0.26, 0.24 | 0.92 |
| Gender (male) | 0.007 | 0.48 | −0.93, 0.95 | 0.98 |
|
JIA subtype Oligoarthritis Psoriatic arthritis RFa-negative polyarthritis RFa-positive polyarthritis Systemic-onset arthritis Enthesitis-related arthritis |
0.003 | |||
| Reference group | ||||
| −1.78 | 1.49 | −4.70, 1.14 | 0.23 | |
| 1.75 | 1.10 | −0.41, 3.91 | 0.11 | |
| 4.94 | 2.47 | 0.10, 9.78 | 0.05 | |
| −0.16 | 2.39 | −4.84, 4.52 | 0.94 | |
| −1.68 | 1.22 | −4.07, 0.71 | 0.17 | |
| Ethnicity (non-Hispanic white) | −1.94 | 0.70 | −3.31, −0.57 | 0.006 |
|
Medications Methotrexate and/or biologics NSAIDsb only None |
0.13 | |||
| Reference group | ||||
| 0.77 | 0.66 | −0.52, 2.06 | ||
| −1.36 | 0.68 | −2.69, −0.03 | ||
| Season (non-Summer) | 0.09 | 0.61 | −1.11, 1.29 | 0.87 |
| Time since disease onset (months) | −0.0005 | 0.01 | −0.02, 0.02 | 0.96 |
a
RF – Rheumatoid factor,
b
NSAIDs – non-steroidal anti-inflammatory drugs