In the multiple comparison post-hoc analysis test across disease status groups, the mean difference between the post COVID-19 condition group was statistically significantly different (p < .001) compared to the healthy group (EQ-5D-5L index: mean difference = .220; EQ VAS: 15.1; WHO-5: 17.9; PHQ-9: −6.3 GAD-7: −4.9), the chronic condition(s) group (EQ-5D-5L index:.05; WHO-5: 8.4; PHQ-9: −3.9; GAD-7: −3.3) and the acute COVID-19 infection group (GAD-7: −1.7, p = .004) (Supplementary Table S4). This evidence concerns the gene GAD1 and COVID-19.