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

From: 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

Variable Multivariate Logistic Regression
Model 1a Model 2b Model 3c
  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
  1. a Predicting asthma with Preterm birth
  2. b Predict asthma with low birth weight
  3. c Predict asthma with both preterm birth and low birth weight
  4. Ref, Reference
  5. *p < 0.05