Table 5.

Effect of prenatal exposure to VOC and NOx on selected measures of pulmonary function (resistance and reactance) (hPa.s.L⁻¹) by age of follow up and during total period of study in preschool children from Morelos, Mexico.

Pollutants	Resistance						Reactance
	Rrs6		Rrs8		Rrs10		Xrs6		Xrs8		Xrs10
	βa	p-value	βa	p-value	βa	p-value	βa	p-value	βa	p-value	βa	p-value
36 monthsb
Xylene	−15.5	0.422	−16.1	0.337	−20.1	0.207	1.30	0.930	1.40	0.927	1.22	0.933
NO2	−0.018	0.491	−0.015	0.179	−0.013	0.191	0.003	0.780	0.007	0.448	0.007	0.414
48 monthsb
Xylene	20.8	0.070*	25.4	0.025*	20.3	0.064*	−9.33	0.199	−12.6	0.089*	−11.7	0.177
NO2	0.016	0.011*	0.014	0.022*	0.014	0.024*	−0.005	0.177	−0.006	0.131	−0.006	0.127
60 monthsb
Xylene	1.12	0.928	−3.56	0.779	−9.41	0.427	−21.0	0.012*	−24.5	0.012*	−19.6	0.032*
NO2	0.008	0.300	0.004	0.568	0.003	0.654	−0.010	0.045*	−0.010	0.089*	−0.008	0.139
Follow upc
Benzene	26.99	0.704	−40.89	0.551	−50.60	0.427	−13.23	0.789	−13.70	0.798	1.61	0.975
Toluene	−1.26	0.927	1.26	0.925	1.92	0.878	−3.05	0.751	−3.42	0.744	−2.85	0.776
Xylene	9.48	0.304	9.08	0.303	4.37	0.593	−11.40	0.074*	−11.91	0.083*	−10.14	0.124
NO2	0.011	0.050*	0.011	0.209	0.011	0.193	−0.011	0.101	−0.014	0.228	−0.013	0.260

^aAll model adjusted for age, age 2, height, sex, supplementation group, passive smoking and maternal history of atopy.

^bLineal regression models.

^cLineal mixed effects models.

^*.05 ≤ P ≤.08.