Fig. 2

A, B, C Forest plot illustrating the association between DFUs and varying thresholds of vitamin D levels. A: 25 nmol/L, B: 50 nmol/L, C: 75 nmol/L. df, degrees of freedom; IV, inverse variance; M-H, Mantel–Haenszel.
A, B, C Forest plot illustrating the association between DFUs and varying thresholds of vitamin D levels. A: 25 nmol/L, B: 50 nmol/L, C: 75 nmol/L. df, degrees of freedom; IV, inverse variance; M-H, Mantel–Haenszel.