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Table 4 Characteristics of the newborns enrolled in the allergic and non-allergic families cohorts

From: The Urban Environment and Childhood Asthma (URECA) birth cohort study: design, methods, and study population

  Allergic Families Non-Allergic Families
Characteristic n % N %
  560 100.0 49 100.0
Race or ethnicity*     
   Hispanic of any race 115 20.8 10 20.4
   Black alone 386 69.8 37 75.5
   White alone 7 1.3 0 0.0
   More than one race 38 6.9 2 4.1
   All others 7 1.3 0 0.0
   Missing 7 -- 0 --
Sex     
   Male 287 51.2 25 51.0
   Female 273 48.8 24 49.0
Gestational age in weeks     
   34 9 1.6 0 0.0
   35 13 2.3 0 0.0
   36 25 4.5 1 2.0
   37 61 10.9 6 12.2
   38 100 17.9 10 20.4
   39 173 30.9 15 30.6
   40 118 21.1 11 22.4
   41 59 10.5 6 12.2
   42 2 0.4 0 0.0
Type of delivery     
   Spontaneous vaginal 342 61.1 31 63.3
   Assisted vaginal 43 7.7 4 8.2
   Elective c-section 68 12.1 12 24.5
   Non-elective c-section 107 19.1 2 4.0
Breastfed at birth 289 57.2 29 61.7
Breastfeeding at 3 mos. 121 24.0 13 27.7
Household tobacco smoke exposure at 3 mos. 263 58.7 23 56.1
Continuous measures Mean SD Mean SD
   Gestational age (weeks) 38.7 1.5 39.0 1.3
   Birthweight (grams) 3236.8 514.4 3211.8 503.9
   Length (cm) 50.1 2.5 49.9 2.7
   Head circumference (cm) 33.6 1.6 33.3 2.2
   5-minute Apgar score 8.9 0.5 8.9 0.5
  1. *Determined by the open-ended question posed to the mother, "How would you describe the race, nationality, or ethnic background of your baby?"