# Table 3 Results of handgrip strength measurement

Females Males
HC, n = 36 ME/CFS, n = 61   CRF, n = 18   HC, n = 30 ME/CFS, n = 44
Fmax1 28.2 (6.25) 18.1 (6.68) p < 0.0001 18.9 (6.73) p < 0.0001
p < 0.0001
45.8 (10.2) 31.2 (10.4) p < 0.0001
Fmax2 28.7 (5.73) 16.0 (7.14) p < 0.0001 17.2 (6.00) 48.3 (9.58) 29.2 (10.9) p < 0.0001
Fmean1 25.6 (5.87) 14.6 (6.09) p < 0.0001 15.5 (6.34) p < 0.0001
p < 0.0001
41.8 (9.66) 26.3 (9.91) p < 0.0001
Fmean2 25.9 (5.46) 12.9 (6.24) p < 0.0001 14.3 (5.74) 44.2 (9.32) 24.5 (10.4) p < 0.0001
Fatigue Ratio 1 1.105 (0.09) 1.300 (0.297) p < 0.0001 1.261 (0.21) p = 0.0001 1.097 (0.04) 1.213 (0.18) p = 0.0006
p = 0.0012
Fatigue Ratio 2 1.113 (0.07) 1.299 (0.25) p < 0.0001 1.223 (0.13) p = 0.0004 1.097 (0.05) 1.216 (0.17)
Recovery Ratio 1.0 (0.077) 0.87 (0.19) p < 0.0001 0.96 (0.26) p = 0.0020 1.1 (0.14) 0.92 (0.14) p < 0.0001
Comparison of first and second measurement
Fmax1 28.2 p = 0.3295  18.1 p < 0.0001 18.9 p = 0.0053 45.8 p = 0.0048 32.2 p = 0.0019
Fmax2 28.7 16.0 17.2   48.3   29.2
Fmean1 25.6 p = 0.3537 14.6 p < 0.0001 15.5 p = 0.0376 41.8 p = 0.0057 26.3 p = 0.0022
Fmean2 25.9 12.9 14.3   44.2   24.5
1. Mean value of handgrip strength in kg and ratios with standard deviation in brackets; p-value refers to comparison with healthy controls (Mann–Whitney-Test) or, in the second compartment of the table, to comparison of both sessions (Paired t-test), respectively