Multivariable multinomial regression analysis* OR (95% CI) | ||
---|---|---|
Sick leave trajectories variables | ‘Intermediate risk’ n=122 | ‘High risk’ n=45 |
Symptom characteristics | ||
Comorbidity musculoskeletal | 1.37 (0.84 to 2.21) | 3.28 (1.49 to 7.20) |
Recurrent symptoms | 1.09 (0.64 to 1.84) | 4.04 (1.92 to 8.52) |
Specific diagnosis vs non-specific diagnosis | 0.40 (0.25 to 0.66) | 0.44 (0.21 to 0.93) |
Poor perceived general health: SF-12, first question | 3.01 (1.37 to 6.64) | 1.75 (0.59 to 5.17) |
Functional limitations, DASH (0–100) | 1.03 (1.02 to 1.05) | 1.03 (1.01 to 1.05) |
Psychosocial characteristics | ||
Somatisation, 4DSQ (0–48), middle (11–20) vs low (0–10) | 1.02 (0.58 to 1.79) | 1.21 (0.53 to 2.75) |
High (21–32) vs low (0–10) | 0.98 (0.23 to 4.27) | 9.62 (1.87 to 49.41) |
Physical work characteristics | ||
Work-related symptoms | 4.34 (2.20 to 8.54) | 6.41 (2.01 to 20.45) |
Heavy physical load, PWQ (0–100), >19.0 | 1.78 (1.08 to 2.92) | 1.20 (0.57 to 2.56) |
Psychosocial work factors, JCQ | ||
High quantitative job demands (12–48), score >30 | 1.19 (0.74 to 1.92) | 0.37 (0.17 to 0.81) |
Low coworker support (4–16), score <12 | 1.94 (1.11 to 3.40) | 5.12 (2.28 to 11.51) |
Intercept | −3.88 | −5.90 |
Explained variance (Nagelkerke's R2) | 0.36 | |
% Correctly predicted overall | 70.6 | |
Per class: (low risk group: 92.1%) | 26.1% | 22.7% |
Associations are expressed in ORs (ORs) with 95% CIs (95% CI) and Nagelkerke R2 indicated the proportion of explained variance. DASH=disability of arm, shoulder and hand questionnaire (0 (no disability) to 100 (completely disabled),30 perceived health=1st question of the SF-12 recoded into ‘good’ (‘excellent’, ‘very good’, ‘good’) and ‘poor’ (‘fair’ or ‘poor’),31 4DSQ=Four Dimensional Symptom Questionnaire (0–32),23 SOS=Social Support Scale, a Dutch version of the ‘Social Support Questionnaire’ (SSQ) (12–60),32 PWQ=physical load at work questionnaire ((0 no workload) to 100 (highest workload)) 36 JCQ=Job Content Questionnaire (JCQ), Dutch translation.37
*The low risk group is the reference group for the multinomial regression analysis. Cut-off points are defined by median score of the total population.