Table 1.
Baseline maternal and infant characteristics.
| Late preterm infant group | BFR (n = 39) | ||
|---|---|---|---|
| NEF (n = 22) | STF (n = 18) | ||
| Hospital of birth, n (%) | |||
| Other Hospital | 0 (0.0) | 1 (5.6) | 1 (2.6) |
| Flinders Medical Centre | 5 (22.7) | 2 (11.1) | 0 (0.0) |
| Lyell McEwin Hospital | 5 (22.7) | 5 (27.8) | 0 (0.0) |
| Women's and Children's Hospital | 12 (54.5) | 10 (55.6) | 38 (97.4) |
| Racea–European-descent Australian, n (%) | 18 (81.8) | 15 (83.3) | 29 (74.4) |
| Maternal weight: mean (SD) | 78.9 (21.4) | 81.2 (16.3) | 67.2 (7.6) |
| Maternal BMI: mean (SD) | 26.2 (4.4) | 30.1 (6.6) | 24.9 (2.5) |
| Mother smoked during pregnancy, n (%) | 4 (18.2) | 10 (55.6) | 2 (5.1) |
| Completion of secondary schooling, n (%) | 9 (40.9) | 9 (50.0) | 33 (84.6) |
| Completion of further study, n (%) | 13 (59.1) | 12 (66.7) | 37 (94.9) |
| Primiparous, n (%) | 7 (31.8) | 5 (27.8) | 21 (53.8) |
| Caesarian section delivery | 11 (50.0) | 10 (55.6) | 7 (17.9) |
| Infant sex male, n (%) | 11 (50.0) | 11 (61.1) | 17 (43.6) |
| Infant from a twin birthb, n (%) | 8 (36.4) | 4 (22.2) | |
| GA late preterm infants n (%) | |||
| <35 weeks | 6 (27.3) | 3 (16.7) | N/A |
| >35 weeks | 16 (72.7) | 15 (83.3) | N/A |
| PMA at enrolment (week): median (IQR) | 40.0 (37.9–41.5) | 40.1 (37.9–41.7) | 41.4 (41.1–41.9) |
| Infant birth weight (gm): mean (SD) | 3,203.4 (803.5) | 3,187.4 (745.9) | 3,602.9 (425.2) |
| Infant birth length (cm): mean (SD) | 48.6 (2.4) | 49.3 (3.5) | 51.6 (2.1) |
| Infant birth HC (cm): mean (SD) | 34.6 (2.2) | 34.3 (1.9) | 35.8 (1.2) |
| % fat: Mean (SD) | 14.8 (7.3) | 14.0 (6.7) | 12.8 (4.0) |
| % fat free mass: mean (SD) | 85.2 (7.3) | 86.0 (6.7) | 87.2 (4.0) |
| Fat mass: mean (SD) | 0.5 (0.4) | 0.5 (0.3) | 0.5 (0.2) |
| Body mass: mean (SD) | 3.2 (0.8) | 3.2 (0.8) | 3.6 (0.4) |
| Body volume: mean (SD) | 3.1 (0.8) | 3.1 (0.8) | 3.5 (0.4) |
| Body density: mean (SD) | 1.0 (0.0) | 1.0 (0.0) | 1.0 (0.0) |
| Fat free mass density: mean (SD) | 1.1 (0.0) | 1.1 (0.0) | 1.1 (0.0) |
BFR, breastfeeding reference group; HC, head circumference; NEF, nutrient enriched formula group; PMA, post-menstrual age; STF, standard term formula group.
a
Category was: European-descent Australian, European, Middle Eastern or Arabic.
b
NEF group includes four twin pairs, STF group Includes one twin pair and two infants from a twin birth where only one twin participated.