|aAdjusted for child’s sex and exact age, maternal smoking during pregnancy, infant (0–12 months) being around smokers, season of birth (mold/wet/pollen/dry), mean daily PM2.5 during first 3 months of life, breastfeeding duration, signs of moderate/extensive mold at home visit (6 or 12 months), distance (≤ 150 m) from highway (6 or 12 months), and signs of cockroaches at home visit (6 or 12 months). bAdjusted odds ratios reflect change per 10-fold increase in metabolite concentrations (the metabolites were modeled as log10-transformed variables). cUrinary measurements were adjusted for specific gravity. After excluding mothers with missing covariate data, specific gravity–adjusted DAP concentrations were available for 241 mothers during the first half of pregnancy and for 313 mothers during the second half of pregnancy. dPregnancy average is derived from the average of the two measurements taken during pregnancy; for mothers who did not have both measurements, the average reflects the single measurement available. eAny report on respiratory symptoms including exercise-induced coughing was also included under the respiratory symptoms variable; i.e., all children classified as positive for exercise-induced coughing were also classified as having respiratory symptoms.