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Table 3 Comparison of recorded parameters between young and older men groups

From: Hand grip strength variability during serial testing as an entropic biomarker of aging: a Poincaré plot analysis

ParametersYoung men (n = 40), mean ± SDOlder men (n = 40), mean ± SDUzpr
HGS, D (kgf)46.85 ± 6.0931.44 ± 7.351006.73≤ 0.051.06
Fatigue, D (%)15.89 ± 7.6834.74 ± 15.86203−5.74≤ 0.05− 0.91
SD1, D (kgf)1.18 ± 0.421.56 ± 0.26291.5−4.89≤ 0.05−0.77
SD2, D (kgf)3.36 ± 1.326.13 ± 1.82191−5.86≤ 0.05−0.93
SD1/SD2, D0.36 ± 0.100.29 ± 0.173754.08≤ 0.050.65
AFE, D (kgf2)13.60 ± 12.0829.65 ± 9.01145−6.30≤ 0.05−1
HGS, ND (kgf)43.39 ± 5.6327.68 ± 6.8086.56.86≤ 0.051.08
Fatigue, ND (%)16.87 ± 8.5438.61 ± 12.45162.5− 6.13≤ 0.05− 0.97
SD1, ND (kgf)1.13 ± 0.361.50 ± 0.27270−5.10≤ 0.05− 0.81
SD2, ND (kgf)3.51 ± 1.526.03 ± 1.91240.5−5.38≤ 0.05−0.85
SD1/SD2, ND0.36 ± 0.140.28 ± 0.13491.52.96≤ 0.050.47
AFE, ND (kgf2)13.31 ± 9.9528.42 ± 9.96179.5−5.97≤ 0.05−0.94
  1. HGS hand grip strength, D dominant, ND nondominant, SD standard deviation, AFE area of the fitting ellipse, n number of subjects, U Mann–Whitney’s U-test values, z scores, p thresholds of statistical significance, r effect size coefficient