Relative risks and 95% confidence intervals from multivariate analysis of allergic sensitisation in relation to weighted road density within 75 m radius and 50 m radius of home.

<p>RRs expressed per unit increase in weighted road density variable, where one unit relates to 100's education, mother's education, environmental tobacco smoke exposure, breastfed to 6 months, any dog owned by 8 years, any cat owned by 8 years, maternal smoking in pregnancy, gas cooking at home.</p

(Overall Sample) Univariate and multivariate logistic regression analysis for allergic sensitisation in relation to weighted road density within 50 m radius of home.

<p>Relative Risks (RRs) expressed per unit increase in weighted road density variable, where one unit relates to 100 m local road or 33.3 m of motorway within given radius of the home.</p><p>RR is the Relative Risk per unit increase in weighted road density from Poisson regression with robust standard errors conducted on binary variables.</p>‡<p>Multivariate analyses are adjusted for sex, father's education, mother's education, environmental tobacco smoke exposure, breastfed to 6 months, any dog owned by 8 years, any cat owned by 8 years, maternal smoking in pregnancy, gas cooking at home.</p

Percent difference and 95% confidence intervals from multivariate analysis of lung function and flow variables in relation to weighted road density within 75 m radius and 50 m radius of home.

<p>Percent difference expressed per unit increase in weighted road density variable, where one unit relates to 100</p

Traffic intensity distribution within 75(Figure 1a) and 50 m of home (Figure 1b) for all children with available questionnaire or clinical data, n = 419.

<p>Traffic intensity distribution within 75(<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0098978#pone-0098978-g001" target="_blank">Figure 1a</a>) and 50 m of home (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0098978#pone-0098978-g001" target="_blank">Figure 1b</a>) for all children with available questionnaire or clinical data, n = 419.</p

(Overall Sample) Univariate and multivariate linear regression for spirometry and total IgE (kU/L) and Poisson regression with robust standard error analyses for AHR, eNO, questionnaire outcomes (all) in relation to weighted road density within 50 m radius of home.

<p>Relative Risks (RRs) and percent difference (B) expressed per unit increase in weighted road density variable, where one unit relates to 100 m local road or 33.3 m of motorway within given radius of the home.</p><p>Lung function variables are logged, therefore percent differences by B = 100(e^β−1) are presented for each unit increase in weighted road density, where β is the regression coefficient from linear regression analyses for continuous variables.</p><p>RR is the Relative Risk per unit increase in weighted road density from Poisson regression with robust standard errors conducted on binary variables.</p>‡<p>Multivariate analyses are adjusted for sex, father's education, mother's education, environmental tobacco smoke exposure, breastfed to 6 months, any dog owned by 8 years, any cat owned by 8 years, maternal smoking in pregnancy, gas cooking at home. Univariate and multivariate lung function analyses included adjustment for age, height and weight.</p>‡‡<p>p-value from additional analysis where an interaction term of weighted road density and atopy was included in the model.</p