Table 2.
Analysis | I2 | Effect model | SMD | 95%CI | P-value |
---|---|---|---|---|---|
Hcy and MS | 90 | Random | 0.48 | 0.18,0.77 | 0.001 |
Vitamin B12 and MS | 91 | Random | -0.05 | -0.35,0.25 | 0.75 |
Folate and MS | 80 | Random | 0.12 | -0.10,0.34 | 0.28 |
SMD: standardized mean difference; Random: the random-effect model; 95% CI: 95% confidence interval; Hcy: homocysteine; MS: multiple sclerosis.