FIGURE 2.

Associations of early-life a) upper and b) lower respiratory tract infections with school-age asthma. Data are presented as odds ratio (95% confidence interval), derived from multilevel logistic regression models. The dark blue diamonds represent models adjusted for maternal history of asthma and atopy, ethnicity, education level, smoking during pregnancy, parity and pet keeping, and child's sex, gestational age at birth, birthweight, season of birth, breastfeeding and daycare attendance. The light blue circles represent models additionally adjusted for preceding a) upper or b) lower respiratory tract infections. p-values all <0.01.