Table 1.
Characteristics of 101 mother-infant dyads from the Southern California Mother’s Milk Study, 2016–2019. Data reported are mean and standard deviation (SD) unless otherwise noted.
| Mean ± SD or N, % N = 101 |
|
|---|---|
| Maternal characteristics | |
| Age (years) at 1-month postpartum visit | 29 ± 6 |
| Socioeconomic status (SES)a | 27 ± 12 |
| Pre-pregnancy BMI (kg/m2) | 28.7 ± 6.0 |
| Infant characteristics | |
| Age (days) at 1-month postpartum visit | 32.8 ± 3.1 |
| Sex (Female, Male, %Female) | 51, 50, 50.5% |
| Age of solid foods (months)b | 5.9 ± 1.7 |
| Antibiotics (Yes, No, %Yes) | 11, 90, 10.9% |
| Birth mode (Vaginal, C-section, %Vaginal) | 75, 26, 74.3% |
| Birth weight (kg) | 3.4 ± 0.4 |
| Birth length (cm) | 50.4 ± 2.5 |
| Gestational age | |
| Early (< 38 weeks gestation) | 26 (25.7%) |
| On time (38–42 weeks gestation) | 54 (53.5%) |
| Late (> 42 weeks gestation) | 21 (20.8%) |
a Median replacement was performed for missing values (N = 2).
b N = 100.
SES, socioeconomic status; BMI, body mass index.