Fig. 3

Linear regression between BB-DNA loads and lymphocyte and neutrophil count, CRP, and D-dimer levels in old COVID-19 patients. A positive association between neutrophil count and BB-DNA (Beta = 0.186, p = 0.045), after adjusting for age, sex, corticosteroid therapy and clinical frailty scale was found (B). No significant association were observed between BB-DNA and lymphocyte count (Beta = -0.020, p = 0.82), CRP (Beta = 0.042, p = 0.64) and D-dimer (Beta = 0.060, p = 0.52) (A, C, D). All data were log-transformed