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Table 4 Transformation of total MFI-20 raw total score to interval scale

From: Multidimensional fatigue inventory and post-polio syndrome – a Rasch analysis

Raw score

Interval score

Raw score

Interval score

20

20

61

45.1

21

27.3

62

45.9

22

32.1

63

46.6

23

35.3

64

47.3

24

37.8

65

48.0

25

39.7

66

48.7

26

41.3

67

49.4

27

42.7

68

50.2

28

43.9

69

64.6

29

45.0

70

65.0

30

46.0

71

65.5

31

46.9

72

65.9

32

47.7

73

66.3

33

48.4

74

66.7

34

49.1

75

67.1

35

49.8

76

67.6

36

50.4

77

68.0

37

51.0

78

68.5

38

51.6

79

69.0

39

52.1

80

69.4

40

52.7

81

69.9

41

53.2

82

70.5

42

53.7

83

71.0

43

54.1

84

71.6

44

54.6

85

72.2

45

55.1

86

72.8

46

55.5

87

73.4

47

55.9

88

74.1

48

56.4

89

74.9

49

56.8

90

75.7

50

37.1

91

76.6

51

37.9

92

77.6

52

38.6

93

78.7

53

39.4

94

79.9

54

40.1

95

81.4

55

40.8

96

83.2

56

41.6

97

85.4

57

42.3

98

88.4

58

43.0

99

93.0

59

43.7

100

100

60

44.4