Demographic Characteristics of Mothers, Firstborn Infants, and Secondborn Infants Participating in the INSIGHT RCT and SIBSIGHT Observational Cohort
| . | Reponsive Parenting . | Control . | ||
|---|---|---|---|---|
| . | Firstborn (n = 57) . | Secondborn (n = 57) . | Firstborn (n = 60) . | Secondborn (n = 60) . |
| Maternal characteristics | ||||
| Age at delivery, y | 29.8 (4.4) | 32.1 (4.2)a | 28.4 (4.0) | 31.1 (4.1)a |
| Prepregnancy BMI, kg/m2 | 24.8 (4.7) | 25.8 (5.1)a | 25.3 (5.4) | 26.0 (6.0)a |
| Gestational wt gain, kg | 14.9 (5.6) | 11.1 (5.5)a | 14.6 (5.1) | 11.3 (6.5)a |
| Non-Hispanic White | 52 (93) | 52 (93) | 57 (95) | 57 (95) |
| College graduate | 43 (75) | 43 (75) | 46 (77) | 46 (77) |
| Married | 53 (93) | 55 (97) | 54 (90) | 56 (93) |
| Household income | ||||
| <$50 000 | 6 (11) | 3 (5) | 11 (18) | 5 (8) |
| ≥$50 000 | 51 (89) | 51 (89) | 46 (77) | 50 (83) |
| Don’t know, refuse to answer, or missing | 0 (0) | 3 (5) | 3 (5) | 5 (8) |
| Infant characteristics | ||||
| Birth wt, g | 3388 (424) | 3431 (442) | 3449 (412) | 3512 (432) |
| Sex, female | 30 (53) | 35 (61) | 32 (53) | 32 (53) |
| . | Reponsive Parenting . | Control . | ||
|---|---|---|---|---|
| . | Firstborn (n = 57) . | Secondborn (n = 57) . | Firstborn (n = 60) . | Secondborn (n = 60) . |
| Maternal characteristics | ||||
| Age at delivery, y | 29.8 (4.4) | 32.1 (4.2)a | 28.4 (4.0) | 31.1 (4.1)a |
| Prepregnancy BMI, kg/m2 | 24.8 (4.7) | 25.8 (5.1)a | 25.3 (5.4) | 26.0 (6.0)a |
| Gestational wt gain, kg | 14.9 (5.6) | 11.1 (5.5)a | 14.6 (5.1) | 11.3 (6.5)a |
| Non-Hispanic White | 52 (93) | 52 (93) | 57 (95) | 57 (95) |
| College graduate | 43 (75) | 43 (75) | 46 (77) | 46 (77) |
| Married | 53 (93) | 55 (97) | 54 (90) | 56 (93) |
| Household income | ||||
| <$50 000 | 6 (11) | 3 (5) | 11 (18) | 5 (8) |
| ≥$50 000 | 51 (89) | 51 (89) | 46 (77) | 50 (83) |
| Don’t know, refuse to answer, or missing | 0 (0) | 3 (5) | 3 (5) | 5 (8) |
| Infant characteristics | ||||
| Birth wt, g | 3388 (424) | 3431 (442) | 3449 (412) | 3512 (432) |
| Sex, female | 30 (53) | 35 (61) | 32 (53) | 32 (53) |
Values are mean (SD) or n (%). BMI, body mass index. There were no significant differences by study group.
Different from firstborns in same group (P < .05).