Figure 2. Meta-analysis of the association between rs1799752 in ACE1 and COVID-19 severity: comparison severe+moderate vs. mild. A) allelic model; B) dominant model; C) recessive model; D) overdominant model; E) II vs. DD; F) DI vs. DD. The results of the included studies presented as ORs, with 95 % CI, and the overall effect with 95 % CI are shown in the forest plot. P values given are derived from heterogeneity tests.