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Table 4 Comparison of recorded parameters between young and older women groups

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

ParametersYoung women (n = 40), mean ± SDOlder women (n = 40), mean ± SDUzpr
HGS, D (kgf)26.07 ± 5.0019.64 ± 3.52226.55.51≤ 0.050.87
Fatigue, D (%)24.53 ± 8.5248.09 ± 12.72146−6.29≤ 0.05−0.99
SD1, D (kgf)1.19 ± 0.371.63 ± 0.26235− 5.43≤ 0.05−0.86
SD2, D (kgf)3.44 ± 0.795.38 ± 1.52203−5.74≤ 0.05−0.91
SD1/SD2, D0.36 ± 0.140.35 ± 0.176571.37
AFE, D (kgf2)13.07 ± 5.6227.41 ± 8.26122.5−6.51≤ 0.05−1.03
HGS, ND (kgf)23.38 ± 4.5017.10 ± 3.171825.94≤ 0.050.94
Fatigue, ND (%)26.70 ± 10.4353.84 ± 7.8227−7.43≤ 0.05−1.17
SD1, ND (kgf)1.14 ± 0.301.58 ± 0.21206.5−5.71≤ 0.05−0.90
SD2, ND (kgf)3.25 ± 0.715.05 ± 1.25187−5.89≤ 0.05−0.93
SD1/SD2, ND0.37 ± 0.130.34 ± 0.116771.18
AFE, ND (kgf2)11.73 ± 4.2825.17 ± 7.4272−7.00≤ 0.05−1.11
  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