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Table 5 Comparison of recorded parameters between young and older groups

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

ParametersYoung group (n = 80), mean ± SDOlder group (n = 80), mean ± SDUzpr
HGS, D (kgf)36.46 ± 11.8325.54 ± 8.2514725.90≤ 0.050.66
Fatigue, D (%)20.21 ± 9.1541.42 ± 15.78806.5−8,17≤ 0.05−0.91
SD1, D (kgf)1.19 ± 0.391.60 ± 0.261090−7.20≤ 0.05−0.80
SD2, D (kgf)3.40 ± 1.085.76 ± 1.71816−8.13≤ 0.05−0.91
SD1/SD2, D0.36 ± 0.120.32 ± 0.1720154.04≤ 0.050.45
AFE, D (kgf2)13.34 ± 9.3628.53 ± 8.66551.5−9.04≤ 0.05−1.01
HGS, ND (kgf)33.38 ± 11.2722.39 ± 7.491379.56.21≤ 0.050.69
Fatigue, ND (%)21.78 ± 10.6846.23 ± 12.86520−9.14≤ 0.05−1.02
SD1, ND (kgf)1.13 ± 0.331.54 ± 0.25989−7.54≤ 0.05−0.84
SD2, ND (kgf)3.38 ± 1.185.54 ± 1.68889.5−7.88≤ 0.05−0.88
SD1/SD2, ND0.36 ± 0.130.31 ± 0.122361.52.86≤ 0.050.32
AFE, ND (kgf2)12.52 ± 7.6526.80 ± 8.87533.5−9.10≤ 0.05−1.02
  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