Figure 5. The predictive values of VZV-specific IgG according to (A) total and (B) bioavailable 25-OH-D levels among the entire dialysis cohort, constructed with the generalized additive model (GAM).
Threshold values of (A) 27.8 ng/ml and (B) 3.88 ng/ml were chosen for further analysis. Abbreviations: IgG, immunoglobulin G, VZV, varicella-zoster virus.