Fig. 1: The overall cumulative infection risk among household members and cumulative infection risk by different risk factors (unadjusted).
From: Behavioral factors and SARS-CoV-2 transmission heterogeneity within a household cohort in Costa Rica
The overall cumulative infection risk is calculated as fraction of seropositive among all 719 household contacts. The cumulative infection risk within a given stratum is calculated as the fraction of seropositive individuals among the household contacts within the stratum. We stratified the 719 household contacts by household level characteristics of household size; index case characteristics including index cases’ age, sex, obesity or not, mask wearing frequency; household member properties including household contacts’ age, sex, obesity or not, mask wearing frequency, if cared for index case, shared bedroom with index case or interaction frequency with index case after the diagnosis of the index case. Confidence intervals are based on a generalized estimating equation analysis applied to each risk factor one at a time that takes within household correlations into account.
