Table 2.

Estimated Effects of Average Prenatal CO on Infant Lung Function: Linear Regression

Lung Function Outcomes	Univariate Model			Model 1*			Model 2†
	β	SE	P Value	β	SE	P Value	β	SE	P Value
Tptef:Te	−0.004	0.001	0.01	−0.004	0.002	0.01	−0.004	0.002	0.01
RR, breaths/min	0.28	0.11	0.01	0.28	0.11	0.02	0.28	0.11	0.01
Vt, ml	−0.02	0.06	0.77	0.001	0.05	0.97	0.001	0.05	0.97
MV, ml/min	6.68	3.94	0.09	7.26	3.76	0.05	7.21	3.77	0.05
Crs/kg, ml/cm H2O/kg	0.001	0.001	0.34	0.001	0.001	0.52	0.001	0.001	0.53

Definition of abbreviations: CO = carbon monoxide; Crs/kg = passive respiratory system compliance per kilogram; MV = minute ventilation; RR = respiratory rate; Tptef:Te = ratio of the time to peak tidal expiratory flow to expiratory time.

^*Models adjusted for child sex, length, weight, and age at examination, and maternal education, ethnicity, and wealth index, per 1 ppm increase in average prenatal CO.

^†Models additionally adjusted for child birth weight and gestational age at delivery.