NAMPT and Hepatic fibrosis: Figure 7 summarizes the obtained meta-analysis results. The pooled studies for the analysis assessing serum visfatin levels in the presence and absence of liver fibrosis demonstrated an overall MD of 4.133 (95% CI −3.176–11.443). Substantial heterogeneity was reported with an I2 = 80.83% and p-value = 0.035.