Statistical analysis for factors associated with transmission and
correlation between immune parameters
Associations between household members being positive to SARS-CoV-2
detected by NPS with demographic characteristics, clinical parameters
and preventive measures were assessed using generalising estimating
equations (assuming an exchangeable correlation structure and
distribution of dependent variable as binomial) controlling for the
number of contacts within a household (Figure 2 A). The correlation
between immune parameters were assessed using tetrachoric correlation as
the immune parameters are dichotomous (Figure 2 B).