Description of the population and virus-specific IgG data
A total of 530 children from EGEA1 (mean (min-max) age: 11.1 (2-16);
57% boys) and 1,241 adults from EGEA2 (mean (min-max) age 43.4 (18-79);
48% men) had valid IgG measurements and were analyzed in this study
(Figure 1). Among them, 270 individuals had IgG measurements both in
EGEA1 and EGEA2 surveys. The main characteristics of the included
population are presented in Table 1. In EGEA1, 42% of the children were
exposed to passive smoking. In EGEA2 half of the population was
ever-smoker and almost half of the ever-smokers were still current
smokers. The number of individuals with ever-asthma and allergic
sensitization was 274 (52%) and 331 (64%) among children,
respectively, and 498 (40%) and 648 (55%) among adults, respectively.
Individuals with two IgG measures were younger at the second survey as
compared to all EGEA2 participants (22.9 ± 3.1 years vs. 43.0 ± 17.0
years).