Table 1.
Demographic characteristics of the cohort. Data shown as mean ± SEM with given ranges where appropriate, unless stated otherwise.
| Characteristic | Mean ± SEM | Range |
|---|---|---|
| Maternal age at infant birth (n = 81) | 33.2 ± 0.52 | 25.1–46.4 |
| Parity (n = 83) | 2.1 ± 0.1 | 1–4 |
| Maternal ethnicity (n = 83) | ||
| Caucasian | 74 | |
| Other | 9 | |
| 24-hour infant breast milk intake (mL, n = 59) | 776.3 ± 24.0 | 348–1344 |
| Maternal supplementation (n = 50) Calcium Magnesium Iron Zinc |
n = 10 n = 18 n = 38 n = 8 |
|
| HM collection+ (n = 83) | ||
| Left breast/right breast | 29/54 | |
| Infant sex (n = 83) | ||
| Male/female | 39/44 | |
| Gestational age (weeks) | 39.2 ± 0.1 | 36.6–41.2 |
| Infant birth weight (kg) (n = 78) | 3.49 ± 0.48 | 2.36–4.36 |
| Infant WFA z-score at birth (n = 78) | 0.38 ± 0.1 | −2.08–2.16 |
| Infant length at birth (cm) (n = 78) | 51.0 ± 0.28 | 45–59 |
| Infant LFA z-score at birth (n = 78) | 0.78 ± 0.15 | −2.23–4.82 |
+ Samples were collected from the same breast side at every time interval, except for one mother, for which the left side was used for 1–6 months and the right side was used for 9 and 12.