Table 1.

Association of Selected Demographic Characteristics and Tobacco Product Use with Bronchitis and Wheeze in the Children’s Health Study

Characteristic		Number (% of Column Total)*	Bronchitis [n (% of Row Total)]†	OR (95% CI)	Current Wheeze [n (% of Row Total)]†	OR (95% CI)
Total		2,086	368 (19.2)†		255 (12.3)†
Sex	Female	1,034 (49.6)	188 (19.8)	Reference	136 (13.2)	Reference
	Male	1,052 (50.4)	180 (18.6)	0.93 (0.74–1.16)	133 (12.6)	0.95 (0.74, 1.23)
Ethnicity	Non-Hispanic white	732 (35.1)	160 (23.2)	1.56 (1.22–1.99)	118 (16.1)	1.66 (1.26–2.19)
	Hispanic white	1,078 (51.7)	161 (16.3)	Reference	112 (10.4)	Reference
	Other	276 (13.2)	47 (19.5)	1.25 (0.87–1.79)	39 (14.1)	1.42 (0.96– 2.09)
Parental education	<12th grade	387 (20.1)	47 (13.4)	Reference	28 (7.3)	Reference
	12th grade	312 (16.2)	59 (20.4)	1.66 (1.09–2.53)	42 (13.5)	2.00 (1.21–3.30)
	Some college	720 (37.4)	137 (20.4)	1.66 (1.16–2.38)	110 (15.3)	2.31 (1.49–3.57)
	College degree	258 (13.4)	57 (24.0)	2.04 (1.33–3.13)	43 (16.7)	2.56 (1.54–4.24)
	Some graduate school	246 (12.8)	42 (18.4)	1.47 (0.93–2.31)	33 (13.4)	1.98 (1.16–3.37)
Secondhand smoke in home	No	1,964 (94.3)	332 (18.3)	Reference	252 (12.9)	Reference
	Yes	119 (5.7)	36 (32.1)	2.11 (1.39–3.19)	17 (14.3)	1.13 (0.67–1.92)
Cigarette use	Never	1,693 (81.3)	271 (17.3)	Reference	196 (11.6)	Reference
	Past	271 (13.0)	58 (24.2)	1.53 (1.11–2.11)	46 (17.0)	1.56 (1.10–2.21)
	Current	119 (5.71)	39 (35.5)	2.63 (1.74–3.98)	27 (22.7)	2.24 (1.42–3.52)

Definition of abbreviations: CI = confidence interval; OR = odds ratio.

^*Denominator (n = 2,086 with information on electronic cigarette use and either outcome) varies because of missing values in covariates.

^†n = 1,922 for bronchitic symptoms with complete outcome information, n = 2,083 for wheeze.