The letters by Jindal and Lv et al. provided important suggestions to interpret our recent article published in Hepatology, which concluded that current and past hepatitis B virus (HBV) infections are not associated with liver injury and mortality in COVID‐19.[ 1 ] Also, liver injury was shown to be associated with mortality in COVID‐19, which echoed our previous study.[ 2 ] We have also examined the impact of COVID‐19—related medication use on liver injury. Regarding the severity of COVID‐19, 295 (6.0%), 34 (9.6%), and 52 (14.5%) patients who had no, current, and past HBV infection were admitted to the intensive care unit; 154 (3.1%), 13 (3.7%), and 26 (7.2%) required invasive mechanical ventilation, respectively. This might reflect the advanced age and burden of comorbidities among patients with past HBV infection compared with the other groups.
In our cohort, 79/5639 (1.4%) patients had liver cirrhosis, which was associated with more mortality.[ 1 ] Among 66 patients with available Child‐Pugh score, 0 (0%), 1 (10.0%), and 1 (33.3%) patients with Child‐Pugh class A, B, and C developed acute liver injury, respectively; 5 (9.4%), 3 (30.0%), and 1 (33.3%) patients died, respectively (Figure 1). Three (5.7%), 1 (10.0%), and 1 (33.3%) patients with Child‐Pugh class A, B, and C entered the intensive care unit; 2 (3.8%), 0 (0%), and 0 (0%) of them required invasive mechanical ventilation. Among patients with COVID‐19 with current or past HBV infection, 4 (11.1%) patients with cirrhosis and 25 (3.7%) patients without cirrhosis died. These findings agreed with studies that suggested an increased mortality risk in patients with cirrhosis across worsening Child‐Pugh class.[ 3 ]
FIGURE 1.
The clinical stage of liver cirrhosis in patients with COVID‐19 and the corresponding mortality rate
A study showed that patients with alcohol‐associated liver diseases are associated with more death than patients with other etiologies of chronic liver diseases.[ 3 ] However, the prevalence of alcohol‐related liver diseases was relatively low in our local population. Further studies are required to compare the disease severity of COVID‐19 in patients infected with HBV with those of other etiologies of chronic liver diseases.
In summary, patients with COVID‐19 with HBV‐related liver cirrhosis are at risk of adverse clinical outcomes. Close monitoring of liver biochemistries and HBV DNA, use of HBV antiviral therapy, and cautious use of COVID‐19 medications with the least hepatotoxicity are important.
CONFLICT OF INTEREST
Dr. Yip consults and is on the speakers’ bureau for Gilead. Dr. Grace Wong advises, is on the speakers’ bureau for, and received grants from Gilead. She advises and is on the speakers’ bureau for Janssen. She is on the speakers’ bureau for Abbott, AbbVie, Bristol‐Myers Squibb, Echosens, Furui, and Roche. Dr. Vincent Wong advises, is on the speakers’ bureau for, and received grants from Gilead. He advises and is on the speakers’ bureau for Echosens. He advises 3V‐BIO, AbbVie, Allergan, Boehringer Ingelheim, Intercept, Janssen, Novartis, Novo Nordisk, Perspectum Diagnostics, Pfizer, TARGET‐NASH, and Terns. He is on the speakers’ bureau for Bristol‐Myers Squibb and Merck.
AUTHOR CONTRIBUTIONS
All authors were responsible for the writing, review and final approval of the letter.
Funding information
Supported by the Commissioned Health and Medical Research Fund of Food and Health Bureau of HKSAR Government (reference number: CID‐CUHK‐D)
REFERENCES
- 1. Yip TC, Wong VW, Lui GC, Chow VC, Tse YK, Hui VW, et al. Current and past infections of hepatitis B virus do not increase mortality in patients with COVID‐19. Hepatology. 2021. May 7. 10.1002/hep.31890. [Epub ahead of print] [DOI] [PMC free article] [PubMed] [Google Scholar]
- 2. Yip TF, Lui GY, Wong VS, Chow VY, Ho TY, Li TM, et al. Liver injury is independently associated with adverse clinical outcomes in patients with COVID‐19. Gut. 2021;70:733–42. [DOI] [PubMed] [Google Scholar]
- 3. Marjot T, Moon AM, Cook JA, Abd‐Elsalam S, Aloman C, Armstrong MJ, et al. Outcomes following SARS‐CoV‐2 infection in patients with chronic liver disease: an international registry study. J Hepatol. 2021;74:567–77. [DOI] [PMC free article] [PubMed] [Google Scholar]