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Table 5 Arabic DASH total raw ordinal-level score (0–116) to interval level score (0–100) with 100 representing worst upper extremity function

From: Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement model

Raw score

Interval-level score

Raw score

Interval-level score

Raw score

Interval-level score

Raw score

Interval-level score

0

0.0

30

54.6

60

66.9

90

71.6

1

10.0

31

55.3

61

67.1

91

71.8

2

16.2

32

56.0

62

67.2

92

72.1

3

20.1

33

56.7

63

67.4

93

72.3

4

23.0

34

57.4

64

67.5

94

72.5

5

25.3

35

58.0

65

67.7

95

72.8

6

27.3

36

58.6

66

67.8

96

73.1

7

29.1

37

59.1

67

68.0

97

73.4

8

30.7

38

59.7

68

68.1

98

73.7

9

32.2

39

60.2

69

68.3

99

74.0

10

33.7

40

60.7

70

68.4

100

74.4

11

35.1

41

61.2

71

68.5

101

74.7

12

36.4

42

61.6

72

68.7

102

75.1

13

37.7

43

62.1

73

68.8

103

75.6

14

39.0

44

62.5

74

69.0

104

76.0

15

40.2

45

62.9

75

69.1

105

76.5

16

41.4

46

63.3

76

69.3

106

77.1

17

42.5

47

63.6

77

69.4

107

77.7

18

43.7

48

64.0

78

69.5

108

78.4

19

44.8

49

64.3

79

69.7

109

79.2

20

45.8

50

64.6

80

69.8

110

80.1

21

46.8

51

64.9

81

70.0

111

81.3

22

47.8

52

65.1

82

70.2

112

82.7

23

48.8

53

65.4

83

70.3

113

84.5

24

49.7

54

65.7

84

70.5

114

87.3

25

50.6

55

65.9

85

70.6

115

91.9

26

51.5

56

66.1

86

70.8

116

100.0

27

52.3

57

66.3

87

71.0

  

28

53.1

58

66.5

88

71.2

  

29

53.9

59

66.7

89

71.4

  
  1. For the raw ordinal-level scores, items scored from 0 to 4 with a total raw score ranging from 0 to 116 for the 29 items