Table 2a.

Indoor coarse PM concentrations and asthma morbidity by atopic status: bivariate models^*

	Non-atopic coarse			Atopic coarse
	IRR	95% CI	p-value	IRR	95% CI	p-value
Cough, wheezing, chest tightness	1.06	(1.0, 1.13)	0.06	1.02	(0.92, 1.13)	0.68
Slow down	1.07	(1.0, 1.13)	0.05	1.14	(1.04, 1.25)	<0.01
Symptoms with running	0.73	(0.56, 0.90)	<0.01	1.12	(1.01, 1.23)	0.02
Nocturnal symptoms	1.08	(1.02, 1.15)	0.01	1.03	(0.93, 1.14)	0.55
Limited speech	1.11	(1.04, 1.18)	<0.01	1.14	(0.99, 1.30)	0.07
Beta Agonist use	1.07	(1.01, 1.13)	0.02	1.06	(0.96, 1.15)	0.24

^*Incidence rate ratios (IRR) are presented per 10 μg/m³ increase in PM concentration.

Models were adjusted for age, race, gender, parent education, season, indoor PM_2.5, outdoor PM_2.5, and outdoor PM_2.5–10