Table 1 Comparison of the baseline characteristics between non-sarcopenia and sarcopenia participants whose data were extracted from the NHANES

Age, years

67.8±6.2

73.1±7.9

<0.001

Sex (male), n (%)

426 (48.5)

44 (40.0)

0.094

Race (white), n (%)

497 (56.5)

68 (61.8)

0.405

Body mass index, kg/m²

28.5±4.8

22.8±3.6

<0.001

Serum creatinine, mg/dL

0.69±0.14

0.64±0.14

<0.001

Serum cystatin C, mg/L

0.89±0.15

0.95±0.17

<0.001

SI

79.0±17.9

68.1±13.7

<0.001

Albumin, g/L

41.4±2.8

43.1±3.3

0.373

Total protein, g/L

74.6±4.6

75.2±5.1

0.225

Iron, umol/L

15.9±5.7

17.8±6.7

0.001

Uric acid, umol/L

312.8±80.6

278.9±66.4

<0.001

Cholesterol, mmol/L

265.3±49.4

263.0±58.7

0.769

Blood urea nitrogen, mmol/L

5.2±1.4

5.0±1.6

0.159

Bone mineral density, g/cm²

1.06±0.13

0.90±0.13

<0.001

Total fat, kg

28.9±9.0

20.4±6.7

<0.001

Total lean mass, kg

47.6±10.9

36.8±7.0

<0.001

Calf circumference, cm

37.4±3.5

32.6±3.1

<0.001

Arm circumference, cm

32.5±3.9

27.6±3.3

<0.001

Waist circumference, cm

100.1±12.9

87.7±11.4

<0.001

Thigh circumference, cm

50.7±5.6

43.4±4.7

<0.001

Triceps skinfold, mm

19.4±7.7

15.0±6.9

<0.001

ASM, kg

20.2±5.3

14.8±3.3

<0.001

ASMI, kg/m²

7.3±1.3

5.7±0.9

<0.001

Handgrip strength, kg

27.7±8.7

15.9±4.6

<0.001

Gait speed, m/s

0.99±0.23

0.94±0.33

0.042