Table 1. Demographics and group comparisons.
| All patients | |||||||
|---|---|---|---|---|---|---|---|
| All (n = 132) | Male (n = 97) | Female (n = 35) | P-value* | ||||
| Median | Interquartile range | Median | Interquartile range | Median | Interquartile range | ||
| Age (years) | 13.0 | 11.0–16.0 | 13.0 | 11.0–16.0 | 16.0 | 11.0–17.0 | 0.075 |
| Height (m) | 1.57 | 1.47–1.64 | 1.57 | 1.45–1.68 | 1.57 | 1.49–1.60 | 0.473 |
| Weight (kg) | 58.0 | 47.3–70.0 | 60.0 | 49–73 | 52.0 | 42.0–64.0 | 0.020 |
| BMI (kg/m 2 ) | 23.7 | 21.2–27.7 | 24.3 | 21.7–27.8 | 22.1 | 18.0–26.0 | 0.006 |
| Liver fat (%) | 18.0 | 5.9–32.9 | 20.1 | 10.9–34.0 | 10.9 | 3.1–20.0 | 0.005 |
| Paraspinal muscle fat (%) | 2.5 | 1.9–3.3 | 2.3 | 1.8–3.3 | 2.5 | 2.2–3.4 | 0.247 |
| Psoas muscle area (mm 2 ) | 601.8 | 460.0–810.9 | 663.9 | 514.1–869.5 | 467.0 | 353.5–588.8 | <0.001 |
| Psoas muscle area z-score | -3.60 | -4.03 –-3.14 | -3.57 | -3.91 –-3.06 | -3.93 | -4.48 –-3.44 | 0.002 |
| Normal group | |||||||
| All (n = 29) | Male (n = 17) | Female (n = 12) | P-value* | ||||
| Median | Interquartile range | Median | Interquartile range | Median | Interquartile range | ||
| Age (years) | 16.0 | 13.5–19.0 | 16.0 | 14.0–19.5 | 16.0 | 12.3–17.0 | 0.263 |
| Paraspinal muscle fat (%) | 2.2 | 1.5–2.6 | 1.9 | 1.2–2.4 | 2.5 | 2.2–2.8 | 0.014 |
| Psoas muscle area (mm 2 ) | 514.6 | 374.5–686.1 | 585.8 | 437.4–900.0 | 409.3 | 354.1–534.9 | 0.027 |
| Psoas muscle area z-score | -4.04 | -4.43 –-3.66 | -3.89 | -4.19 –-3.52 | -4.28 | -4.57 –-3.75 | 0.043 |
| Fatty liver group | |||||||
| All (n = 99) | Male (n = 77) | Female (n = 22) | P-value* | ||||
| Median | Interquartile range | Median | Interquartile range | Median | Interquartile range | ||
| Age (years) | 13.0 | 11.0–16.0 | 12.0 | 11.0–15.0 | 15.5 | 10.0–17.0 | 0.116 |
| BMI z-score | 1.70 | 1.20–2.10 | 1.80 | 1.40–2.20 | 1.25 | 0.40–1.83 | 0.002 |
| Liver fat (%) | 25.0 | 16.0–35.0 | 28.0 | 17.4–35.6 | 18.0 | 12.6–29.3 | 0.025 |
| Paraspinal muscle fat (%) | 2.6 | 2.0–3.4 | 2.7 | 2.0–3.4 | 2.5 | 2.1–3.6 | 0.705 |
| Psoas muscle area (mm 2 ) | 632.1 | 478.0–836.0 | 663.9 | 519.2–885.4 | 478.8 | 345.8–719.1 | 0.003 |
| Psoas muscle area z-score | -3.56 | -3.90 –-3.06 | -3.55 | -3.84 –-3.01 | -3.57 | -4.42 –-3.28 | 0.143 |
BMI body mass index.
*Comparisons between male and female groups using Mann-Whitney U test.