Figure 1.

Adjusted changes and 95% CIs for lung function among boys and girls associated with residential location (urban vs. suburban) in 3 Period 1 and Period 2. Adjusted changes were estimated from regression models controlling height, weight, gender, age, ETS, sleep in shared room/bed, household coal use, kitchen mode, ventilation use while cooking, parental occupation, parental education level, breastfeeding and overweight/obesity. FVC, forced vital capacity; FEV₁, forced expiratory volume in the first second; SD, standard deviation; CI, confidence interval; ETS, environmental tobacco smoke.