TABLE 1.
Physical characteristics of mother-infant pairs1
| Infant age | |||
| 1 mo | 6 mo | Change | |
| Mother | |||
| Age, y | 29.5 ± 4.80 | — | — |
| BMI,2 kg/m2 | 25.5 (10.7) | — | — |
| Pregnancy weight gain, kg | 10.8 ± 7.92 | — | — |
| Gestational age, wk | 39.6 ± 1.23 | — | — |
| Secretor, n yes/no (%) | 18/7 (72) | — | — |
| Infant | |||
| Sex, n F/M (%) | 8/17 (32) | — | — |
| Age,2,3 d | 39.0 (6.00) | 167.0 (4.00) | 128.0 (7.00)‡ |
| Birth weight, kg | 3.56 ± 0.48 | — | — |
| Birth length, cm | 52.0 ± 2.30 | — | — |
| Weight, g | 4720.84 ± 757.9 | 7193.6 ± 1191.3 | 2472.8 ± 729.9‡ |
| Length,2,3 cm | 55.7 (2.60) | 65.8 (2.60) | 9.30 (2.50)‡ |
| Fat mass, % | 23.7 ± 2.97 | 32.6 ± 3.67 | 8.84 ± 3.33‡ |
| Total fat mass, g | 1190.5 ± 318.3 | 2457.8 ± 615.8 | 1267.0 ± 455.3‡ |
| Lean mass, g | 3693.2 ± 526.3 | 4865.4 ± 719.5 | 1172.2 ± 518.6‡ |
| Total trunk fat mass,2,3 g | 371.0 (109.0) | 723.0 (468.0) | 360.0 (376.0)‡ |
1
Values are means ± SDs unless otherwise indicated for the 25 mother-infant pairs included in this study. Paired t test on the change or log change (where noted) from ages 1 to 6 mo was used. ‡P < 0.0001.
2
Values are medians with IQRs in parentheses for variables that were not normally distributed.
3
Log changes are shown.