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. Author manuscript; available in PMC: 2022 Oct 18.
Published in final edited form as: J Pediatr. 2018 Jul 13;201:27–33.e4. doi: 10.1016/j.jpeds.2018.06.004

Table I.

Baseline demographics and dyadic characteristics as a function of infant absolute birth weight

Characteristics NBW (n = 1590) HBW (n = 209) P value
Mother
 Prepregnancy BMI, kg/m2 26.44 ± 6.51 28.83 ± 7.46 <.001
 Gestational weight gain, kg 13.70 ± 6.09 15.69 ± 6.94 <.001
 Age, y 29.70 ± 5.36 30.11 ± 4.91 .29
 Primiparous, % 29.8 20.9 <.01
 Prenatal smoking, % 7.4 2.4 <.01
 <185% PIR, % 36.7 35.4 .93
 Caucasian, % 86.6 91.4 <.001
 Cesarean delivery, % 27.8 37.3 <.01
 Gestational diabetes, % 6.5 7.8 .77
Infant
 Birth weight, g 3379.15 ± 357.10 4267.91 ± 222.73 <.001
 Infant sex, % male 47.8 62.2 <.001
 Gestational age, wk 39.26 ± 1.23 39.99 ± 1.02 <.001

PIR, poverty-to-income ratio.