Mean changes in FVC% predicted at age 8 years in relation to per 1 μg/m3 higher particulate matter ≤10 μm in aerodynamic diameter (PM10) from local major road traffic (PM10_road) in different time periods by maternal education, smoking, and sex. Fully adjusted model (*adjusted for sex, gestational age, maternal education, home ownership, maternal smoking during pregnancy, passive smoking in childhood, presence of damp and mold at home, and season of clinic visit). CI = confidence interval; T1 = first trimester; T2 = second trimester; T3 = third trimester; WP = whole pregnancy.