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Table 4 Relative and absolute reliability of balance parameters

From: Reliability of a new test battery for fitness assessment of the European Astronaut corps

Parameter

Pooled mean ± SD

Relative reliability

Absolute reliability

ICC3.1

SEM

CV

Sway area L1 (mm2)

22.5 ± 12.6

0.07

±12.20

±54.33

Sway area L2 (mm2)

114.8 ± 58.2

0.57

×/÷1.37

×/÷36.75

Sway area L3 (mm2)

894.2 ± 882.0

0.58

×/÷1.66

×/÷66.15

Sway area L4 (mm2)

45.4 ± 38.3

0.60

±24.24

±53.35

Sway area L5 (mm2)

161.3 ± 188.6

0.59

×/÷1.71

×/÷70.75

Sway area L6 (mm2)

1,124.0 ± 1,831.1

0.39

×/÷1.90

×/÷89.71

COP path length L1 (mm)

84.8 ± 27.5

0.21

±24.53

±28.94

COP path length L2 (mm)

346.7 ± 98.8

0.59

±63.23

±18.24

COP path length L3 (mm)

1,036.5 ± 433.6

0.63

±263.47

±25.42

COP path length L4 (mm)

92.9 ± 54.2

0.80

×/÷1.25

×/÷24.51

COP path length L5 (mm)

308.7 ± 141.5

0.61

×/÷1.26

×/÷26.37

COP path length L6 (mm)

941.7 ± 327.6

0.62

±202.95

±21.55

Average rotation velocity L7 (°/s)

2.4 ± 1.3

0.54

×/÷1.43

×/÷42.69

Average rotation velocity L8 (°/s)

3.1 ± 1.4

0.55

×/÷1.32

×/÷32.38

Average rotation velocity L9 (°/s)

3.3 ± 1.4

0.04

±1.38

±42.14

Average rotation velocity L10 (°/s)

3.0 ± 1.1

0.35

±0.85

±28.21

  1. SD standard deviation, ICC intraclass correlation coefficient, SEM standard error of measurement, CV coefficient of variation, L Level, COP centre of pressure, “±” error in absolute form, “×/÷” error as ratio, based on log transformed data.