PLOD1 and COVID-19: Although the lower ratio of FSH/LH (1.59 vs. 2.08, P < 0.001; FSH/LH ≥ 2: 30.80 vs. 52.19%, P = 0.003) was observed in both continuous and biological cutoff value in the all- COVID-19 group, these significant differences disappeared when compared with basal level and control groups (Figures 2E–H, Supplementary Table 2).