Table 1

Content validity index values for the individual key domains identified by clinicians

Frequency

Mean importance

Frequency × importance product

Clinician-identified domains

1. Pain

100

3.9

390.0

2. Fatigue

99

3.7

366.3

3. Sleep quality

93

3.5

325.5

4. Patient global assessment

86

3.4

292.4

5. Physical function

84

3.3

277.2

6. Depression

80

3.2

256.0

7. Anxiety

77

3.3

254.1

8. Clinician global assessment

68

3.3

224.4

9. Quality of life

67

3.2

214.4

10. Occupational dysfunction

64

3.2

204.8

11. Social dysfunction

62

3.2

198.4

12. Cognitive impairment

57

3.2

182.4

Salaffi et al. Arthritis Research & Therapy 2009 11:R125   doi:10.1186/ar2792