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Table 2 The degrees of difference in sarcopenia related parameters with age

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

   ASM index((kg/m2) Gait speed (m/s) Handgrip strength (kg) Repeated chair stands (s)
Males n Mean ± SD Comparison1 (%) Comparison2 (%) Mean ± SD Comparison1 (%) Comparison2 (%) Mean ± SD Comparison1 (%) Comparison2 (%) Mean ± SD Comparison1 (%) Comparison 2 (%)
20–49 56 8.88 ± 0.84 - - 1.50 ± 0.24 - - 40.6 ± 5.8 - - 6.29 ± 2.0 - -
50–59 20 9.31 ± 0.84 4.84 4.84 1.53 ± 0.25 2.00 2.00 41.53 ± 5.73 2.29 2.29 7.39 ± 1.84 17.49 17.49
60–69 82 8.55 ± 0.73 −3.72 −8.16 1.23 ± 0.28 −18.00 −19.61 36.72 ± 8.26 −9.56 −11.58 10.63 ± 7.62 69.00 43.84
70–79 112 8.50 ± 0.68 −4.28 −0.58 1.18 ± 0.25 −21.33 −4.07 33.37 ± 7.45 −17.81 −9.12 10.46 ± 2.59 66.30 −1.60
80- 13 8.26 ± 1.23 −6.98 −2.82 1.07 ± 0.29 −28.67 −9.32 26.56 ± 5.89 −34.58 −20.41 11.63 ± 3.65 84.90 11.19
Females              
20–49 92 7.31 ± 0.53 - - 1.45 ± 0.19 - - 26.1 ± 3.9 - - 5.81 ± 1.40 - -
50–59 50 7.69 ± 0.84 5.20 5.20 1.46 ± 0.28 0.69   26.95 ± 5.13 3.26 3.26 8.19 ± 6.63 40.96 40.96
60–69 146 7.69 ± 0.78 5.20 0.00 1.20 ± 0.29 −17.24 −17.81 21.74 ± 5.62 −16.70 −19.33 10.17 ± 3.32 75.04 24.18
70–79 86 7.66 ± 0.78 4.79 −0.39 1.13 ± 0.30 −22.07 −5.83 21.54 ± 5.59 −17.47 −0.92 11.82 ± 7.76 103.44 16.22
80- 22 7.14 ± 0.68 −2.33 −6.79 0.86 ± 0.22 −40.69 −23.89 18.65 ± 5.12 −28.54 −13.42 17.30 ± 16.46 197.76 46.36
  1. Comparison 1, compare the mean values (Xn) of the variable obtained in the groups aged ≥ 50 with those (X) obtained in the 20–49 years group, and calculated as 100*(Xn-X)/X; Comparison 2: compare the mean values (Xn) of the variable obtained in the groups aged 50 with the mean values Xn-1of the next younger group, and calculated as 100*(Xn-Xn-1)/Xn-1