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Table 7 Scores by GFI, FIQ-Total, and Pain NRS Quintiles

From: Multidimensional daily diary of fatigue-fibromyalgia-17 items (MDF-fibro-17): part 2 psychometric evaluation in fibromyalgia patients

MDF-Fibro-17 Scores

Q1

Q2

Q3

Q4

Q5

F Value

Probability F

Tests of Known-groups Validity by GFI Quintile

 Total

4.02

4.94

5.59

6.42

7.19

84.37

<0.001

 Global Fatigue Experience

4.38

5.52

6.02

6.78

7.48

88.67

<0.001

 Cognitive Fatigue

3.23

4.02

4.76

5.71

6.47

48.02

<0.001

 Physical Fatigue

4.71

5.47

5.90

6.76

7.37

53.77

<0.001

 Motivation

3.93

4.91

5.71

6.55

7.53

86.88

<0.001

 Impact on Function

3.82

4.77

5.54

6.30

7.08

74.76

<0.001

Tests of Known-groups Validity by FIQ-Total Quintile

 Total

3.99

5.01

5.69

6.26

7.23

81.63

<0.001

 Global Fatigue Experience

4.48

5.51

6.07

6.64

7.52

77.75

<0.001

 Cognitive Fatigue

3.17

4.30

4.82

5.39

6.54

43.89

<0.001

 Physical Fatigue

4.57

5.37

6.15

6.71

7.44

67.05

<0.001

 Motivation

3.93

5.06

5.80

6.41

7.45

73.08

<0.001

 Impact on Function

3.80

4.82

5.61

6.14

7.18

77.70

<0.001

Tests of Known-groups Validity by Pain NRS Quintiles

 Total

4.35

4.97

5.57

6.33

7.13

53.58

<0.001

 Global Fatigue Experience

4.69

5.38

5.97

6.75

7.58

72.11

<0.001

 Cognitive Fatigue

3.65

4.20

4.80

5.52

6.18

23.90

<0.001

 Physical Fatigue

4.74

5.41

6.00

6.61

7.65

64.24

<0.001

 Motivation

4.44

5.06

5.64

6.51

7.20

39.74

<0.001

 Impact on Function

4.22

4.80

5.42

6.26

7.03

47.41

<0.001

  1. FIQ Fibromyalgia Impact Questionnaire, GFI Global Fatigue Index from the MAF, MDF-Fibro-17 Multidimensional Daily Diary of Fatigue-Fibromyalgia-17, NRS Numeric Rating Scale, Q quintile