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Table 1 The descriptions of anthropometry, muscle strength and physical performance data of young group and elderly group (mean ± SD)

From: Sarcopenia-related features and factors associated with lower muscle strength and physical performance in older Chinese: a cross sectional study

Characteristic Young group (20–59) Older group (≥60)   
Males (n = 76) Female (n = 142) Male (n = 207) Female (n = 254) p1 p2
Average age (year) 38.6 ± 12.0 41.7 ± 12.6 71.0 ± 5.7 69.2 ± 6.5 <0.0001 0.6297
Anthropometric measurements
Height (m) 1.73 ± 0.07 1.61 ± 0.05 1.67 ± 0.06 1.56 ± 0.06 <0.0001 <0.0001
Weight (kg) 72.76 ± 11.22 59.55 ± 8.90 66.93 ± 10.00 60.05 ± 9.97 0.0221 <0.0001
Fat mass (kg) 14.84 ± 4.99 17.61 ± 5.60 16.48 ± 5.47 20.57 ± 5.97 <0.0001 <0.0001
Lean mass (kg) 54.43 ± 6.82 39.13 ± 4.10 47.63 ± 5.43 37.39 ± 4.88 <0.0001 <0.0001
Arm skeletal mass (kg) 7.90 ± 1.08 5.84 ± 2.52 6.88 ± 0.81 5.40 ± 0.74 <0.0001 <0.0001
Leg skeletal mass (kg) 19.35 ± 2.43 13.90 ± 1.46 16.96 ± 1.95 13.30 ± 1.73 <0.0001 <0.0001
ASM (kg) 27.25 ± 3.44 19.46 ± 2.06 23.84 ± 2.75 18.70 ± 2.42 <0.0001 <0.0001
Fat mass (%) 19.90 ± 4.04 28.98 ± 5.42 24.17 ± 5.56 33.73 ± 5.73 <0.0001 <0.0001
Lean mass (%) 75.00 ± 3.76 66.25 ± 5.12 71.66 ± 5.89 62.82 ± 5.73 <0.0001 <0.0001
Arm skeletal mass (%) 10.92 ± 0.96 9.91 ± 4.64 10.35 ± 0.90 9.08 ± 1.00 0.0001 <0.0001
Leg skeletal mass (%) 26.72 ± 1.32 23.54 ± 1.82 25.52 ± 2.09 22.35 ± 2.03 <0.0001 <0.0001
Percentage of ASM (%) 37.55 ± 2.12 32.93 ± 2.38 35.87 ± 2.98 31.42 ± 2.93 <0.0001 <0.0001
BMI (kg/m2) 24.09 ± 3.12 22.87 ± 3.30 23.88 ± 3.13 24.59 ± 3.71 0.0005 0.6346
LMI (kg/m2) 17.97 ± 1.62 15.02 ± 1.30 16.99 ± 1.45 15.29 ± 1.56 0.1064 <0.0001
Arm skeletal mass index (kg/m2) 2.62 ± 0.32 2.24 ± 0.98 2.46 ± 0.23 2.21 ± 0.24 0.0357 <0.0001
Leg skeletal mass index (kg/m2) 6.42 ± 0.61 5.34 ± 0.46 6.05 ± 0.52 5.44 ± 0.56 0.0755 <0.0001
ASMI(kg/m2) 9.00 ± 0.85 7.47 ± 0.65 8.50 ± 0.74 7.65 ± 0.78 0.2292 <0.0001
Muscle strength and body physical function
Handgrip strength (kg) 40.81 ± 5.77 26.44 ± 4.42 34.04 ± 8.05 21.56 ± 5.64 <0.0001 <0.0001
Gait Speed (m/s) 1.51 ± 0.24 1.45 ± 0.22 1.19 ± 0.26 1.15 ± 0.31 <0.0001 0.0200
Chair repeat time (s) 6.58 ± 2.01 6.66 ± 4.27 10.66 ± 5.46 11.42 ± 7.41 <0.0001 0.2287
  1. p1: Age difference; p2: gender difference (across full sample)