Fig. 1

KM curves of different antiviral responses to PVT. Antiviral response = 0: VR; antiviral response = 1: PVR; antiviral response = 2: PNR; antiviral response = 3: VBT. When P < 0.05, the risk of PVT was considered significantly different among different groups. All PVT occurred after patients achieved virological response.