GRN and COVID-19: For the differentiation between sepsis in the confirmatory (n = 127) and non-COVID-19 CAP (n = 31), AUC values were 0.77 (95% CI = 0.68–0.85) for progranulin and 0.83 (95% CI = 0.73–0.92, p = 0.36) for procalcitonin.