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Table 2 Measures, assessment, expected scaling and measurement points

From: Rehabilitation access and effectiveness for persons with back pain: the protocol of a cohort study (REHAB-BP, DRKS00011554)

Outcome Source and reference Total score Scaling Baseline Follow-up
Primary Outcome
 Pain disability CPQ [48, 49] 0 to 100 metric X X
Secondary Outcomes
 Pain intensity CPQ [48, 49] 0 to 100 metric X X
 Days of disability CPQ [48, 49] 0 to 90 metric X X
 Pain self-efficacy PSEQ [50, 51] 10 to 60 metric X X
 Fear avoidance beliefs Modified FABQ subscales [52, 53] 0 to 18 metric X X
 General health COPSOQ [54, 55] 0 to 10 metric X X
 Depressive symptoms PHQ-8 [56, 57] 0 to 24 metric X X
 Work ability WAS [58] 0 to 100 metric X X
 Subjective prognosis of employability SPE [59] 0 to 3 ordinal X X
 Healthcare utilisation: Own development     
  Use of pharmaceuticals   binary X X
  Outpatient visits to physicians   metric X X
  Utilisation of therapy   metric X X
  Hospital stay   binary X X
  Days of sick leave 0 to 365 metric X X
 Days in receipt of sickness absence benefits GPI registers   metric X X
 Days in regular employment GPI registers   metric X X
 Application for disability pension GPI registers   binary   X
 Grant of a disability pension GPI registers   binary   X
Other measures
 Comorbidity Modified subscale of the SCQ [60, 61] 0 to 15 metric X  
 Health behaviour Own development     
  Physical exercise   binary X  
  Cigarette smoking   binary X  
  Body Mass Index   metric X  
  Self-help group or organisation   binary X  
 Employment status Own development   nominal X  
 Job profession Own development   nominal X  
 Working hours Own development   ordinal X  
 Fixed-term job contracts Own development   nominal X  
 Shift work COPSOQ [54, 55]   nominal X  
 Size of enterprise COPSOQ [54, 55]   ordinal X  
 Physical demands FEBA [62] 0 to 15 metric X  
 Psychological demands COPSOQ [54, 55] 0 to 100 metric X  
 Support by supervisor and colleagues COPSOQ [54, 55] 0 to 100 metric X  
 Atmosphere at work COPSOQ [54, 55] 0 to 100 metric X  
 Job insecurity COPSOQ [54, 55] 0 to 100 metric X  
 Overall job satisfaction COPSOQ [54, 55] 0 to 100 metric X  
 Workplace bullying [63] 0 to 100 metric X  
 Cognitions about experiences with rehabilitation services [64]     
  Former medical rehabilitation services    binary X  
  Subjective need for rehabilitation    binary X  
  Intention to apply for medical rehabilitation    binary X  
  Knowledge of rehabilitation application procedures    metric X  
  Negative outcome expectations    metric X  
  Social support from family and friends    metric X  
  Social support from physicians and therapists    metric X  
Socio-demographic data Own development   metric/nominal X  
  1. COPSOQ Copenhagen Psychosocial Questionnaire, CPQ Chronic Pain Grade Questionnaire, FABQ Fear-Avoidance Beliefs Questionnaire, GPI German Pension Insurance, FEBA Fragebogen zur subjektiven Einschätzung der Belastungen am Arbeitsplatz (questionnaire on job demands), PSEQ Pain Self-Efficacy Questionnaire, PHQ-8 Patient Health Questionnaire (8-item version), SCQ Self-Administered Comorbidity Questionnaire, SPE subjective prognosis of employment status, WAS work ability score