Table S5. Multiple regression analyses of changes in children’s lung function associated with concentration of PM_2.5¹.

Lung function	Crude model			Main model2			Model I3			Model II4
	β5 (95% CI)	P value		β (95% CI)	P value		β (95% CI)	P value		β (95% CI)	P value
FVC (mL)	3.04 (−10.99, 17.07)	0.6709		−8.52 (−18.76,1.71)	0.1032		−4.81 (−15.64, 6.03)	0.3853		−1.29 (−13.51, 10.93)	0.8362
FEV1 (mL)	5.34 (−6.89, 17.57)	0.3921		−5.15 (−13.79, 3.50)	0.2437		−3.77 (−12.79, 5.25)	0.4129		−0.47 (−10.39, 9.46)	0.9264
PEF (mL/s)	22.09 (−9.89, 54.07)	0.1764		2.32 (−25.67, 30.30)	0.8712		3.90 (−24.71, 32.50)	0.7896		8.15 (−23.96, 40.26)	0.6193
FEV1/FVC (%)	0.18 (−0.09, 0.45)	0.1903		0.18 (−0.09, 0.45)	0.2022		0.07 (−0.21, 0.35)	0.6070		0.08 (−0.25, 0.40)	0.6331

¹, table data: β (95% CI) P value, Result variable: lung function variables, Exposure variable: concentration of PM_2.5, µg/m³; ², main model adjust for: Age, Gender, Weight, Height; ³, model I adjust for: +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; ⁴, model II adjust for: +Exercise-related variables: Sports activities, and Sweat after sports activities, and Nutrition-related variables: fruit, vegetable, dairy, high fat and high calorie products and fish intake frequency; ⁵, β, the estimated changes of lung function associated with concentration of PM_2.5; CI, confidence interval.