Table 2. The main statistical results concerning vitamin D and RA disease activity.
F: fixed-effects model; N: the relationship between vitamin D and RA was not statistically significant, and therefore we did not assess Venice Criteria grade.
| Studies | Number of patients | R(95%CI) | Heterogeneity test | Effects model | Pegger’s | Venice Rating | Overall credibility | |
|---|---|---|---|---|---|---|---|---|
| DAS28 | 15 | 2748 | -0.13(-0.16,-0.09) | I2 = 46%, P = 0.02 | F | 0.321 | ABA | Moderate evidence |
| CRP | 5 | 312 | -0.12(-0.23,-0.00) | I2 = 0%, P = 0.74 | F | 0.848 | BAA | Moderate evidence |
| ESR | 5 | 355 | -0.02(-0.13,0.08) | I2 = 0%, P = 0.52 | F | 0.806 | N | N |