Table 1.
Prevalence of current respiratory/allergic symptoms among all children, and by sex and ethnicity.
Table 2.
Odds ratios for associations of potentially confounding variables with prevalence of current respiratory/allergic symptoms.
Table 3.
Odds ratios for associations of potentially confounding variables with prevalence of lifetime (ever having had) asthma, hay fever and eczema.
Table 4.
Measured annual mean pollutant concentrations (μg/m3) at selected background (Bk) and roadside (RS) sites surrounding the study area.
Table 5.
Annual mean levels of air pollutants at residential address, by year and averaged across study period, μg/m3.
Fig 1.
Exposure to air pollution as a risk factor for current and lifetime respiratory/allergic symptoms.
Adjusted associations between air pollutants and the prevalence of current and lifetime respiratory/allergic symptoms. Odds ratios adjusted for age, sex, BMI, socio-economic deprivation (IMD score), ETS exposure and year of study, with a random effect for school. Single-pollutant models were calculated for each air pollutant. Odds ratios are for unit increase in pollutant, in μg/m3. Current symptoms defined as within the last 12 months; lifetime conditions defined as ‘having ever had’ asthma, hay fever or eczema. Vertical dotted line indicates null (OR = 1). Horizontal lines indicate 95% confidence intervals of odds ratios. * p<0.05, **p<0.01