Table S3. Multiple regression analyses of changes in children’s lung function associated with ADD of PM_2.5¹, stratified analyses for urban and suburban².

Lung function	Urban			Suburban
	β3 (95% CI)	P value		β3 (95% CI)	P value
FVC (mL)	1.81 (−8.14, 11.76)	0.7190		−15.87 (−31.16, −0.58)	0.0420
FEV1 (mL)	−2.13 (−10.97, 6.71)	0.6342		−13.67 (−36.34, −7.48)	0.0337
PEF (mL/s)	−7.67 (−35.58, 20.23)	0.5867		−8.13 (−49.89, 33.63)	0.7018
FEV1/FVC (%)	−0.13 (−0.40, 0.14)	0.3333		0.07 (−0.35, 0.49)	0.7565

¹, table data: β (95%CI) P-value, Result variable: lung function variables, Exposure variable: ADD of PM_2.5, µg/kg-d; ², adjust for: Age, Weight, Height, Parental smoking, Sleep in own bed/room, Kitchen style, Cook fuel, Ventilation use, Heat in winter, Heat fuel, Air purifier, Keep pets, Mold, Air fresher, Parents’ education and occupation, Children recent respiratory infections, Parental history of asthma, Pre-birth and Breast feeding, exercise-related variables and Nutrition-related variables; ³, β, the estimated changes of lung function associated with ADD of PM_2.5; CI, confidence interval.