Table 2. Results of body composition measurements, investigated by BIA and/or DEXA scan.
| Individual (study ID) | 19 | 32 | 45 | 52 | 53 | 58 | 99 | |
|---|---|---|---|---|---|---|---|---|
| Baseline | Age | 15.4 | 12.8 | 4.9 | 7.5 | 11.4 | 8.8 | 13.3 |
| Weight (kg) | 55.7 | 44.2 | 18.4 | 37 | 62.8 | 50.3 | 72.1 | |
| BMI (kg/m2) | 22.19 | 18.44 | 16.1 | 21.6 | 26.6 | 24.6 | 27.68 | |
| BMI Z-score | 0.98 | 0.23 | 0.2 | 2.8 | 2.8 | 3.23 | 2.65 | |
| BIA | BF% | 33.5 | - | - | 35.5 | 38 | 42.7 | 35.6 |
| Visceral fat area (cm2) | 88.4 | - | - | 69.6 | 123.9 | 128.8 | 125.8 | |
| SMM total (kg) | 20 | - | - | 12 | 20 | 15.1 | 25.6 | |
| SMMa(kg)a | 14.15 | - | 7.71 | 11.97 | 13.77 | 18.79 | ||
| SMMa (kg) in healthy individualsb | 16.2 ± 2.6 | - | - | 6.1 ± 1.4 | 12.8 ± 3.0 | 9.1 ± 2.5 | 12.8 ± 3.0 | |
| SMMa (% SMMa of weight) | 25.4 | - | - | 20.8 | 19.1 | 27.4 | 26.1 | |
| SMMa (%) in healthy individualsb | 29.6 ± 3.8 | - | - | 27.1 ± 2.4 | 28.3 ± 4.3 | 27.1 ± 4.2 | 28.3 ± 4.3 | |
| Skeletal muscle index (kg/m2) | 5.7 | 4.5 | 6.1 | 5.8 | 7.2 | |||
| DEXA | BF% | - | 37.6 | 39 | - | 44.2 | - | - |
| Visceral fat area (cm2) | - | 64.9 | 21.5 | - | 107 | - | - | |
| Lean mass/height2 Z-score | - | –2.3 | - | - | 0.4 | - | - | |
| Skeletal muscle index (kg/m2) | 4.37 | 2.64 | 5.91 |
Abbreviations: BF%, body fat percentage; BIA, bioelectrical impedance analysis; DEXA, dual-energy X-ray absorptiometry; SMMa, appendicular skeletal muscle mass.
a
Appendicular skeletal muscle mass: skeletal muscle mass of arms and legs.
b
Sex- and age-matched healthy controls, based on results of McCarthy et al. (2014).