Table 2.
Infant Anthropometry at Birth and at 6 Months of Age
| Variable1 | Total – n (%) | Mbekweni – n (%) | TC Newman – n (%) | P-value |
|---|---|---|---|---|
| Number of infants; sets of twins | 112 | 57 (51); 1 | 55 (49); 0 | |
| Gender, female | 58 (52) | 34 (60) | 24 (44) | 0.090 |
| Median gestational age at delivery (IQR) | 39 (38 to 40) | 39 (38 to 40) | 39 (38 to 40) | 0.943 |
| Preterm birth | 16 (14) | 7 (12) | 9 (16) | 0.537 |
| Infant anthropometry at birth | ||||
| Median weight in kg (IQR) | 3.0 (2.7 to 3.4) | 3.1 (2.8 to 3.3) | 3.0 (2.6 to 3.5) | 0.463 |
| Median WAZ (IQR) | −0.7 (−1.4 to 0.03) | −0.7 (−1.3 to 0.1) | −0.9 (−1.5 to −0.01) | 0.270 |
| Low WAZ (WAZ of −2 or below) | 9 (8) | 3 (5) | 6 (11) | 0.317 |
| Median head circumference in cm (IQR) | 34 (32 to 34) | 33 (32 to 34) | 34 (32 to 34) | 0.894 |
| Median HCAZ (IQR) | −0.6 (−1.5 to 0.1) | −0.6 (−1.4 to 0.1) | −0.6 (−1.6 to 0.2) | 0.907 |
| Low HCAZ (HCAZ of −2 or below) | 17 (15) | 7 (12) | 10 (18) | 0.384 |
| Infant anthropometry at 6 months of age | ||||
| Median age in months at study visit (IQR), corrected for prematurity at birth | 5.9 (5.8 to 6.0) | 5.9 (5.9 to 6.0) | 5.9 (5.8 to 6.0) | 0.773 |
| Median weight in kg (IQR) | 7.8 (6.7 to 8.6) | 8.1 (7.1 to 8.8) | 7.4 (6.5 to 8.5) | 0.051 |
| Median WAZ (IQR) | 0.2 (−0.8 to 1.0) | 0.4 (−0.4 to 1.4) | −0.1 (−1.0 to 0.8) | 0.011 |
| Low WAZ (WAZ of −2 or below) | 8 (7) | 1 (2) | 7 (13) | 0.030 |
| Median change in WAZ between birth and 6 months (IQR) | 0.8 (−0.2 to 1.5) | 1.0 (−0.02 to 1.9) | 0.6 (−0.4 to 1.2) | 0.076 |
| Median head circumference in cm (IQR) | 43 (42 to 44.3) | 43 (42 to 44.5) | 43 (42 to 44) | 0.815 |
| Median HCAZ (IQR) | 0.2 (−0.6 to 1.4) | 0.2 (−0.6 to 1.8) | −0.01 (−0.7 to 1.3) | 0.400 |
| Low HCAZ (HCAZ of −2 or below) | 2 (2) | 2 (4) | 0 (0) | 0.496 |
| Median change in HCAZ between birth and 6 months (IQR) | 1.1 (−0.1 to 2.1) | 1.3 (−0.04 to 2.5) | 1.0 (−0.1 to 1.8) | 0.375 |
1
WAZ = Weight-for-age z score; HCAZ = Head circumference-for-age z score