Table 1.

AIRE cohort study characteristics at baseline, N = 708

	All		Wheezing		No wheezing
Characteristic	N	%	n	%	n	%
Age mean (years)	8.5 (1.1)		8.3 (0.9)		8.5 (1.0)
Child sex
Female	381	54	62	48	293	55
Male	327	46	68	52	236	45
Highest household education
Less than 12th grade	137	19	29	22	102	19
Completed high school	197	28	27	21	167	32
Some college	236	33	55	42	174	33
Completed 4 years of college	60	8	14	11	31	6
Graduate or professional	50	7	3	2	29	5
Missing	28	4	2	2	26	5
Health insurance
Private	134	19	3	2	88	17
Public	494	70	103	79	391	74
None	43	6	20	15	17	3
Missing	37	5	4	3	33	6
Secondhand smoke exposure
Yes	47	7	5	4	14	3
No	566	80	112	86	454	86
Missing	95	13	12	9	61	12
Maternal smoking during pregnancy
Yes	54	8	16	12	21	4
No	625	88	110	85	489	92
Do not know	29	4	4	3	19	4
Language of survey
English	471	67	97	75	340	64
Spanish	237	33	32	25	189	36
Lived in the same residence since birth
Yes	176	25	34	26	136	26
No	501	71	94	72	381	72
Missing	31	4	1	<1	12	2
Child's history of asthma
Yes	166	23	90	69	65	12
No	539	76	39	30	463	88
Missing	3	<1	0	0	1	<1
Wheezing in past 12 months
Yes	130	18
No	527	74
Missing	49	7