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Table 1 Baseline characteristics of the study population and the young adults

From: Diagnosing sarcopenia and myosteatosis based on chest computed tomography images in healthy Chinese adults

 

Whole Study Population

Young reference group

Men (n = 359)

Women (n = 210)

p

Men (n = 142)

Women (n = 102)

p

Age (years)

43.15 ± 10.67

41.47 ± 11.03

0.0736

32.8 ± 5.0

31.9 ± 4.8

0.1743

Smoking status (%)

      

Never

167 (46.52%)

202 (96.19%)

 < 0.0001

73 (51.41%)

96 (94.12%)

Fisher < 0.0001

Ex-smokers

22 (6.13%)

0 (0.00%)

 

4 (2.82%)

0 (0.00%)

 

Current smokers

163 (45.40%)

7 (3.33%)

 

64 (45.07%)

6 (5.88%)

 

Miss

7 (1.95%)

1 (0.48%)

 

1 (0.70%)

0 (0.00%)

 

Alcohol drinking status (%)

Never

66 (18.38%)

162 (77.14%)

*Fisher < 0.0001

26 (18.31%)

74 (72.55%)

Fisher < 0.0001

Ex-drinkers

3 (0.84%)

0 (0.00%)

 

1 (0.70%)

0 (0.0%)

 

Current drinkers

283 (78.83%)

47 (22.38%)

 

114 (80.28%)

28 (27.45%)

 

Miss

7 (1.95%)

1 (0.48%)

 

1 (0.70%)

0 (0.0%)

 

Height (cm)

168.4 ± 6.2

158.0 ± 5.8

 < 0.0001

171.3 ± 5.6

160.5 ± 5.6

 < 0.0001

Weight (kg)

69.9 ± 10.1

53.7 ± 6.7

 < 0.0001

71.7 ± 10.3

53.4 ± 7.0

 < 0.0001

BMI (kg/m2)

24.6 ± 3.0

21.6 ± 2.6

 < 0.0001

24.4 ± 3.2

20.7 ± 2.4

 < 0.0001

Body composition according to BIA

BSM (kg)

29.09 ± 3.78

20.23 ± 2.38

 < 0.0001

30.22 ± 3.64

20.57 ± 2.58

 < 0.0001

BSM/height2 (kg/m2)

10.24 ± 0.98

8.10 ± 0.72

 < 0.0001

10.30 ± 1.01

7.97 ± 0.78

 < 0.0001

BFM (kg)

18.26 ± 5.59

16.50 ± 4.50

0.0001

18.17 ± 6.08

15.57 ± 4.13

0.0002

BFM/height2 (kg/m2)

6.45 ± 1.96

6.64 ± 1.91

0.2607

6.22 ± 2.11

6.06 ± 1.62

0.5226

Body composition according to CT image

SMA (cm2)

105.4 ± 16.22

69.78 ± 9.84

 < 0.0001

107.9 ± 16.1

71.3 ± 10.5

 < 0.0001

SMA/height2 (cm2/m2)

37.11 ± 5.51

27.95 ± 3.77

 < 0.0001

36.83 ± 5.54

27.69 ± 3.76

 < 0.0001

SMA/weight (cm2/kg)

1.51 ± 0.18

1.31 ± 0.17

 < 0.0001

1.51 ± 0.17

1.34 ± 0.18

 < 0.0001

SMA/BMI (cm2/kg/m2)

4.29 ± 0.54

3.26 ± 0.50

 < 0.0001

4.44 ± 0.53

3.47 ± 0.52

 < 0.0001

SMD (HU)*

41.46 (6.42)

39.52 (6.97)

 < 0.0001

43.66 (5.92)

41.73 (6.33)

 < 0.0001

IMAT (cm2) *

3.14 (3.52)

2.54 (2.75)

 < 0.0001

2.54 (2.78)

1.82 (2.34)

0.002

IMAT/SMA (%) *

3.21 (3.39)

3.47 (4.12)

0.247

2.60 (2.58)

2.47 (2.97)

0.832

  1. Data presented as n (percentage) or mean (standard deviation) if not specified
  2. BMI: body mass index; BFM: body fat mass; BSM: body skeletal muscle; IMAT: intermuscular adipose tissue; SMA: skeletal muscle area; SMD: skeletal muscle radiodensity
  3. * Data presented as median (interquartile range)