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Table 2 Significant Independent Predictors (Adjusted) of the Relative Rate Ratio of RTW during the six month study

From: Bio-psychosocial determinants of time lost from work following non life threatening acute orthopaedic trauma

Main effects model only
Factor P Relative Rate Ratio
(adjusted)
95% C.I
Should not work with current pain: agree 0.007 0.54 0.35-0.84
Co-morbid conditions: one or more 0.027 0.59 0.37-0.94
Blue collar worker 0.016 0.56 0.35-0.89
Orthopaedic injury: more than one region 0.030 0.49 0.26-0.93
Social functioning: high 0.009 1.89 1.17-3.07
Injury severity: ISS >9 0.036 0.36 0.39-0.97
Age (cont) 0.017 0.17 0.96-0.99
Self employed 0.015 2.31 1.18-4.53
Main effects plus interactions
Factor P Relative Rate Ratio
(adjusted)
95% C.I
Should not work with current pain: agree 0.002 0.49 0.31-0.77
High Initial pain intensity 0.008 0.47 0.27-0.82
Co-morbid conditions: one or more 0.016 0.56 0.35-0.89
Blue collar worker 0.008 0.52 0.32-0.84
Initial need for surgery 0.034 0.61 0.39-0.96
Orthopaedic injury: more than one region 0.007 0.41 0.21-0.78
Injury severity: ISS>9 0.045 0.63 0.39-0.99
Age (cont) 0.037 0.98 0.96-0.99
Education*high initial pain level 0.006 4.50 1.55-13.09
   Relative rate ratio for interaction 0.56 × 0.47 × 4.50 = 1.18
Social functioning* receipt of compensation 0.010 3.58 1.35-9.47
   Relative rate ratio for interaction 1.22 × 0.59 × 3.58 = 2.58
  1. Factors included in the final main effects model. Shouldn't work, age, education, injury severity, compensation, blue collar worker, co-morbidities, orthopaedic injury to more than one region, high initial pain, recovery beliefs, self employment. Confounding Factors tested but did not remain in the final model: gender, prior pain