Table 3 Gray feature analysis of abdominal body composition

Mean value (HU)

Subcutaneous fat

− 103.83 (− 107.89, − 97.34)

− 102.94 (− 106.76, − 97.99)

− 104.20 (− 108.16, − 96.68)

.964

Visceral fat

− 96.40 (− 99.55, − 91.75)

− 95.20 (− 99.70, − 92.71)

− 96.56 (− 99.62, − 91.33)

.655

Pure muscle

36.12 ± 5.44

34.37 ± 5.24

36.90 ± 5.39

.037*

Intramuscular fat

− 66.29 ± 4.09

− 67.29 ± 4.28

− 65.85 ± 3.95

.114

Total fat

− 99.27 (− 103.05, − 94.67)

− 99.01 (− 103.18, − 96.75)

− 99.86 (− 103.09, − 93.17)

.854

Total muscle

30.20 (23.35, 34.04)

23.92 (20.75, 32.66)

31.16 (26.16, 36.13)

.019*

Standard deviation

Subcutaneous fat

22.24 (20.84, 23.56)

22.94 (20.47, 24.32)

22.03 (20.86, 23.40)

.835

Visceral fat

24.50 ± 2.01

24.70 ± 2.17

24.42 ± 1.95

.537

Pure muscle

27.00 (26.15, 28.23)

27.68 (27.01, 28.46)

26.65 (25.97, 28.08)

.005*

Intramuscular fat

23.25 ± 2.18

23.66 ± 2.31

23.07 ± 2.12

.225

Total fat

23.93 ± 2.08

23.99 ± 2.20

23.91 ± 2.04

.872

Total muscle

36.96 ± 4.46

38.82 ± 4.66

36.12 ± 4.14

.006*

Kurtosis

Subcutaneous fat

4.19 (3.77, 4.69)

4.15 (3.80, 4.70)

4.23 (3.61, 4.67)

.990

Visceral fat

3.04 (2.83, 3.35)

2.99 (2.76, 3.58)

3.08 (2.87, 3.34)

.542

Pure muscle

3.75 ± 0.37

3.65 ± 0.28

3.79 ± 0.39

.048*

Intramuscular fat

2.68 (2.45, 2.94)

2.58 (2.38, 2.77)

2.75 (2.48, 2.98)

.040*

Total fat

3.39 ± 0.45

3.41 ± 0.48

3.38 ± 0.44

.736

Total muscle

5.16 ± 0.83

4.79 ± 0.80

5.32 ± 0.80

.004*

Skewness

Subcutaneous fat

1.12 (0.92, 1.24)

1.12 (0.98, 1.23)

1.13 (0.87, 1.24)

.847

Visceral fat

0.58 (0.38, 0.74)

0.56 (0.39, 0.74)

0.59 (0.37, 0.74)

.964

Pure muscle

− 0.19 ± 0.29

− 0.09 ± 0.24

− 0.23 ± 0.30

.023*

Intramuscular fat

− 0.55 (− 0.65, − 0.45)

− 0.50 (− 0.60, − 0.43)

− 0.56 (− 0.70, − 0.48)

.054

Total fat

0.82 (0.64, 0.90)

0.80 (0.67, 0.88)

0.84 (0.62, 0.90)

.945

Total muscle

− 1.14 (− 1.23, − 0.95)

− 1.04 (− 1.19, − 0.87)

− 1.15 (− 1.31, − 1.00)

.040*