Table 4 Results of the logistic regression model with VZV seropositivity as the dependent variable; data set stratified in three age groups: children 1 to 6 years of age, 7 to 10, and 11 to 17 years of age. Variables with statistically significant results presented here. Germany (sera collected 2003–2006, available for logistic regression model n = 11,374)
Age 1 to 6 years | Age 7 to 10 years | Age 11 to 17 years | ||||
|---|---|---|---|---|---|---|
n = 3162 | n = 3058 | n = 5154 | ||||
Variable | OR | 95% CI | OR | 95% CI | OR | 95% CI |
Age 1 year | Referent | |||||
2 years | 2.2 | 1.4–3.7 | ||||
3 years | 4.1 | 2.5–6.9 | ||||
4 years | 11.0 | 6.6–18.3 | ||||
5 years | 21.7 | 12.8–37.1 | ||||
6 years | 51.0 | 30.6–85.3 | ||||
7 years | Referent | |||||
8 years | 1.4 | 1.0–1.9 | ||||
9 years | 2.0 | 1.3–3.1 | ||||
10 years | 2.5 | 1.6–4.1 | ||||
Siblings living in the same household: | ||||||
only child | Referent | Referent | Referent | Referent | Referent | Referent |
younger or same age of the siblings | 1.1 | 0.9–1.5 | 1.7 | 1.1–2.6 | 1.7 | 1.2–2.4 |
older siblings | 2.3 | 1.9–2.9 | 1.3 | 0.9–1.8 | 1.2 | 0.8–1.8 |
Age at start of day-care attendance (1 to 10 year olds) | ||||||
< 1 year | 1.6 | 1.0–2.5 | 1.8 | 0.7–4.2 | ||
1 year | 1.6 | 1.1–2.2 | 2.0 | 1.1–3.5 | ||
2 years | 1.3 | 0.9–1.8 | 4.1 | 2.2–7.7 | ||
> = 3 years | 0.9 | 0.7–1.2 | 1.7 | 1.2–2.4 | ||
Migration background: | ||||||
none | 1.3 | 0.9–1.7 | 1.5 | 1.0–2.3 | 1.6 | 1.0–2.5 |
one-sided | 1.1 | 0.7–1.7 | 1.3 | 0.6–2.5 | 1.5 | 0.8–3.0 |
two-sided | Referent | Referent | Referent | |||