Table 2 Demographic characteristics of mothers and consecutively born siblings at the time of delivery (n = 117)
Firstborn | Secondborn | |
|---|---|---|
Maternal Characteristics | ||
Pre-pregnancy BMI, kg/m2a | 25.1 (5.1) | 25.9 (5.5)a |
Non-Hispanic white, n (%) | 109 (93.2) | 109 (93.2) |
Married, n (%) | 107 (91.5) | 111 (94.9) |
Household income, n (%) | – | – |
< $50,000 | 17 (14.5) | 8 (6.8) |
≥ $50,000 | 97 (82.9) | 101 (86.3) |
Don’t know/refuse to answer/missing | 3 (2.6) | 8 (6.8) |
Infant Characteristics | ||
Birthweight, kg, mean (SD) | 3.4 (0.4) | 3.5 (0.4) |
Sex, female, n (%) | 62 (53.0) | 67 (57.3) |
Gestational age at delivery (weeks) | 39.6 (1.3) | 39.4 (1.0)a |
Responsive Parenting (RP) Intervention Group, n (%)b | 57 (48.7) | 57 (48.7) |
Birth spacing, mean (SD), months | – | 30.2 (10.2) |