Fig. 3.

A, B Results of the ANOVA statistical model comparing the three groups of patients (COVID-hyposmia, COVID-non-hyposmia, and PD-hyposmia) with age and sex as nuisance variables. Clusters with significant hypometabolism are shown superimposed on a 3D brain rendering. Direct comparison between patients subgroups was explored in the post hoc analyses (Fig. 4A–C)