Table I.
Ages, anthropometric measures, and MRI measures of fat, muscle, and bone in 70 healthy newborns.
| Males (n = 35) | Females (n = 35) | P-value | |
|---|---|---|---|
| Gestational Age (wk) | 38.9 ± 1.17 | 39.0 ± 1.21 | 0.721 |
| Age (day) | 2.94 ± 1.43 | 3.43 ± 1.87 | 0.227 |
| Weight (kg) | 3.38 ± 0.42 | 3.26 ± 0.40 | 0.215 |
| Body length (cm) | 50.6 ± 2.39 | 50.4 ± 2.73 | 0.743 |
| Head circumference (cm) | 34.0 ± 1.31 | 33.4 ± 1.41 | 0.060 |
| Waist Circumference (cm) | 30.8 ± 1.47 | 30.7 ± 2.05 | 0.827 |
| Appendicular skeleton | |||
| Arm SC adiposity (cm2) | 4.95 ± 1.13 | 5.16 ± 1.10 | 0.422 |
| Arm musculature (cm2) | 3.38 ± 0.68 | 3.19 ± 0.66 | 0.222 |
| Humeral length (cm) | 8.18 ± 0.37 | 8.05 ± 0.40 | 0.151 |
| Humeral CSA (cm2) | 0.37 ± 0.07 | 0.35 ± 0.08 | 0.386 |
| Axial Skeleton | |||
| Abdominal SC adiposity (cm2) | 11.4 ± 1.85 | 11.8 ± 2.25 | 0.439 |
| Paraspinous musculature (cm2) | 4.10 ± 0.68 | 3.85 ± 0.58 | 0.102 |
| Spinal length (cm) | 23.6 ± 1.22 | 23.1 ± 1.22 | 0.108 |
| Intervertebral disc height (cm) | 0.23 ± 0.02 | 0.23 ± 0.03 | 0.323 |
| Vertebral Height (cm) | 0.64 ± 0.06 | 0.62 ± 0.06 | 0.151 |
| Vertebral CSA (cm2) | 1.47 ± 0.11 | 1.31 ± 0.12 | <0.0001 |