Table 1

Explanatory variables grouped by prognostic factors, and numbers (%) in each response category

Factor No1-150(%)
Predisposing
County
 Oslo3072  (49)
 Nordland3192 (51)
Sex
 Men2752 (44)
 Women3501 (56)
Age
 20–341889 (30)
 35–492037 (32)
 50–641349 (22)
 65–79989 (16)
Education
 Elementary school2112 (34)
 College2350 (37)
 University1802 (29)
Employment status
 Working/student3818 (64)
 Homemaker440 (7)
 Unemployed327 (6)
 Pensioner1-151/sick leave1404 (23)
Daily smoking
 No3925 (63)
 Yes2271 (37)
Regular exercise
 ⩾2 sessions a week2740 (44)
 ⩽1 sessions a week3448 (56)
Perceived need
Chronicity
 Non-chronic1057 (17)
 Chronic5162 (83)
Location of pain
 Regional4276 (68)
 Widespread1988 (32)
Pain intensity
 ⩽Median (1.0)4507 (73)
 >Median1657 (27)
Disability (MHAQ1-152)
 ⩽Median (1.0 )3335 (53)
 >Median2929 (47)
Psychosocial
Mental distress (SCL-51-152)
 ⩽Median (1.2)3418 (55)
 >Median2846 (45)
  • 1-150 No does not add up to 6408 because data were missing for some subjects.

  • 1-151 Includes both disability and age pensioners.

  • 1-152 MHAQ = Modified Health Assessment Questionnaire; SCL-5 = symptom check list.