GPT and COVID-19: Liver function tests were also more altered during SARS-CoV-2 infection, indicating signs of liver damage or liver failure, where fasting glucose (p-value = 0.029), ALT (p-value = 0.038), AST (p-value = 0.033), and PT (p-value < 0.001) had significantly higher values compared with the no-COVID-19 group.