Table 2.
Body Composition Measures (Mean ± SD) at ∼5 Mo of Age in XXY and Healthy Start Study
| Typical Girlsa (n = 306) | Typical Boysa (n = 296) | XXY, No Testosterone Treatment (n = 10) | XXY, Testosterone Treatment (n = 10) | |
|---|---|---|---|---|
| Age, mo | 4.98 ± 0.92 | 4.89 ± 0.94 | 4.79 ± 0.87 | 5.05 ± 0.70 |
| Total body mass, kg | 6.57 ± 0.82 | 6.92 ± 0.81 | 6.78 ± 0.82 | 7.23 ± 0.89 |
| Length, cm | 63.1 ± 2.5 | 64.4 ± 2.6 | 64.0 ± 1.9 | 64.4 ± 2.3 |
| FFM, kg | 4.88 ± 0.53 | 5.29 ± 0.54 | 4.96 ± 0.61 | 5.57 ± 0.63 |
| FM, kg | 1.70 ± 0.50 | 1.63 ± 0.50 | 1.82 ± 0.43 | 1.69 ± 0.36 |
a
Reference data from the Healthy Start Study [20].