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Table 1 Median and interquartile range of the screening tests in the investigated sample

From: Cortical hemodynamics as a function of handgrip strength and cognitive performance: a cross-sectional fNIRS study in younger adults

Parameters Median ± interquartile range
BDI-II (total score) 3.0 ± 6.0
Level of education (years) 15.6 ± 2.4
PSQI (total score) 4.0 ± 2.0
BSA (min per week) PA: 236.5 ± 255.0/PE:292.5 ± 350.5
TMT A (s) 19.4 ± 6.3
TMT B (s) 42.9 ± 14.4
TMT B-A (s) 22.9 ± 11.4
EHI (total score) 83.3 ± 17.3
Mean heart rate during ST (bpm) 71.8 ± 20.2
LF/HF ratio 1.43 ± 1.51
Left/Right AHS (kg) 38.9 ± 26.2/44.1 ± 22.7
Left/Right NHS (A.U.) 1.67 ± 0.87/1.87 ± 0.78
Reaction time in ST (s) 0.94 ± 0.37
Correct answers in ST (%) 87.5 ± 12.5
  1. AHS absolute handgrip strength, A.U. arbitrary unit, BDI-II Becks Depression Inventory II (a score of 13 and higher indicates depression [102, 103]), bpm beats per minute, BSA physical activity questionnaire, derived from German ‘Bewegungs- und Sportaktivitätsfragebogen’ (The World Health Organization recommends, at least, 150 min of moderate-intensity physical activity in a week for substantial health benefits [104]), EHI Edinburgh Handedness Inventory (a score of 50 and higher indicates right-handedness [40]), LF/HF ratio low-frequency/high-frequency ratio, kg kilogram, min minutes, NHS normalized handgrip strength (normalized to body-mass-index), PA physical activity, PE physical exercise, s seconds, PSQI Pittsburgh Sleep Quality Index (a score of 6 and higher indicates insomnia [105]), ST Sternberg task, TMT Trail Making Test