Table 2.
Contribution of classification variables to the separation of cluster (n = 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.