Comparison of ECW/TBW in the HBV group and the HCV group according to FIB-4 index. (a) In patients with FIB-4 index <2, ECW/TBW in the HCV group (n = 91) was significantly higher than that in the HBV group (n = 44) (median (range): 0.376 (0.367–0.409) in the HBV group and 0.381 (0.365–0.408) in the HCV-group, p = 0.0188). (b) In patients with 2 ≤ FIB-4 index <4, ECW/TBW in the HCV group (n = 139) was not significantly higher than that in the HBV group (n = 20) (median (range): 0.383 (0.372–0.425) in the HBV group and 0.387 (0.367–0.433) in the HCV group, p = 0.9577). (c) In patients with FIB-4 index ≥4, ECW/TBW in the HCV group (n = 210) was not significantly higher than that in the HBV group (n = 21) (median (range): 0.387 (0.363–0.415) in the HBV group and 0.391 (0.369–0.431) in the HCV group, p = 0.3077).