Table 2

Contribution of classification variables to the separation of cluster (nā€‰=ā€‰634)
Variable Fmax-value Variable specific eta2
Age 208.40 0.40
Number of persons at household 39.18 0.12
Employment status
- Working (full or part-time) 242.31 0.44
Reasons for not working
- Keeping house 31.37 0.17
- Unemployed 16.61 0.10
- Retired 81.44 0.35
- Other 5.38 0.03
Days on sick leave 117.13 0.44
Degree of disability
- Yes 56.83 0.16
Number of pain areas 4.84 0.02
Index of the graded chronic pain (von Korff)
- 0 - -
- 1 4.33 0.02
- 2 18.85 0.06
- 3 0.43 0.00
- 4 25.73 0.08
Gut feeling: Will the pain get away?
- Yes 33.29 0.10
Number of different therapeutic strategies 19.81 0.06
Number of consultations because of back pain/6 months 12.14 0.04
Number of operations because of back pain 14.33 0.05
Symptom check-list-90-R (Somatization) 41.18 0.13
Self-administered comorbidity questionnaire (SACQ)
- Psychological comorbidities* 23.87 0.09
- Musculoskeletal comorbidities ** 56.47 0.19
- Other comorbidities *** 30.61 0.11
Brief resilience scale (RS-11) 118.04 0.28
Hospital anxiety and depression (HADS)
- Anxiety 67.69 0.11
- Depression 141.60 0.31
Coping resources of back pain (FBR)
- Emotional social support 112.55 0.26
- Practical help 85.62 0.22
- Exercise and relaxation 101.90 0.25
- Hobby and enjoyment 215.64 0.41
- Cognitive strategies 183.63 0.37
- Knowledge 86.56 0.22
- Spirituality 63.15 0.17

*Participants with the comorbidities depression and/or other psychiatric diseases.

**Participants with the comorbidities degenerative arthritis and/or rheumatoid arthritis and/or osteoporosis.

***Participants with the comorbidities high blood pressure and/or heart diseases and/or asthma and/or chronic obstructive pulmonary disease and/or ulcer/stomach diseases and/or diabetes and/or high blood lipid level and/or kidney diseases and/or cancer diseases.

Viniol et al.

Viniol et al. BMC Musculoskeletal Disorders 2013 14:294   doi:10.1186/1471-2474-14-294

Open Data