Is preterm birth associated with asthma among children from birth to 17 years old? -A study based on 2011-2012 US National Survey of Children’s Health

Table 3 Multivariate logistic regression of birth characteristics for Asthma, NSCH (2011–2012)

Variable	Multivariate Logistic Regression
Variable	Model 1^a			Model 2^b			Model 3^c
	OR	95% CI		OR	95% CI		OR	95% CI
Preterm birth	1.64*	1.45	1.84	NA			NA
Low birth weight				1.43*	1.25	1.63	NA
Preterm birth and Low birth weight							1.77*	1.52	2.07
Gender of Child (Male)	1.29*	1.19	1.41	1.31*	1.20	1.43	1.30*	1.20	1.42
Race/Ethnicity of Child
Hispanic	Ref			Ref			Ref
Non-Hispanic white	0.94	0.81	1.08	0.95	0.82	1.10	0.94	0.82	1.09
Non-Hispanic black	1.61*	1.36	1.90	1.60*	1.36	1.89	1.59*	1.35	1.88
Non-Hispanic other	1.14	0.95	1.36	1.15	0.96	1.38	1.15	0.96	1.37
Child’s age at interview (years)
< =3	Ref			Ref			Ref
4~6	2.44*	2.06	2.89	2.44*	2.06	2.89	2.44*	2.06	2.89
7~12	3.12*	2.69	3.60	3.11*	2.68	3.60	3.12*	2.70	3.61
13~17	3.84*	3.30	4.46	3.80*	3.27	4.42	3.83*	3.29	4.46
Family Structure
Currently married	Ref			Ref			Ref
Cohabiting	1.17	0.98	1.39	1.17	0.98	1.39	1.17	0.98	1.39
Living apart	1.16*	1.02	1.32	1.16*	1.02	1.32	1.16*	1.02	1.31
Never married	1.40*	1.20	1.64	1.40*	1.20	1.64	1.40*	1.20	1.64
No parents in household	1.61*	1.27	2.04	1.59*	1.25	2.02	1.60*	1.26	2.02
Difficulty paying for bills
Never	Ref			Ref			Ref
Not very often	1.13*	1.02	1.26	1.14*	1.03	1.26	1.14*	1.02	1.26
Somewhat often	1.29*	1.14	1.46	1.30*	1.15	1.47	1.30*	1.15	1.47
Very often	1.61*	1.35	1.92	1.64*	1.38	1.95	1.62*	1.36	1.93
Parents’ Education
More than high school	Ref						Ref
High school graduate	0.97	0.88	1.07	0.97	0.88	1.06	0.97	0.88	1.07
Less than high school	0.94	0.82	1.08	0.93	0.82	1.07	0.94	0.82	1.07
Use of cigarettes, cigars, or pipe tobacco in the household	1.19*	1.08	1.31	1.20*	1.08	1.32	1.19*	1.08	1.31
Litter or garbage on the street or sidewalk	1.08	0.95	1.21	1.07	0.95	1.20	1.07	0.95	1.21

ISSN: 1824-7288