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Table 2 Outcome measures, abbreviation instrument, and assessment moments PREPARE study

From: Effects of nurse-led motivational interviewing of patients with chronic musculoskeletal pain in preparation of rehabilitation treatment (PREPARE) on societal participation, attendance level, and cost-effectiveness: study protocol for a randomized controlled trial

   Baseline Two sessions After pre-treatment Start pain rehab treatment Finish pain rehab treatment 6 months after T3
  Abbr. T0a   T1 T2a T3a T4
Covariates
Demographics patient   x      
Primary outcome effect evaluation
Participation USER-P x   x   x x
Secondary outcomes effect evaluation
Physical functioning/disability PDI x    x x x
Pain intensity VAS x    x x x
Main complaints PSC x    x x x
Drop-out/adherence     #   #  
Self-efficacy/perceived competence GSE x   x   x x
Pain-specific self-efficacy scale CPSS_V2 x   x   x x
Cost-effectiveness evaluation
Cost questionnaire Tic-P x    x   x
Productivity losses SF-HLQ x    x   x
Quality of life/health status SF-36 x    x x x
Potential active ingredients MI
Stages of change MPRCQ 2 x   x    
MI integrity/fidelity    *     
Potential moderators
Credibility and expectancy of the treatment CEQ x   x x   
Motivation TMQ x   x    
Depression BDI x    x x  
Acceptance AAQ-II x   x   x  
Flexible goal-adjustment FGA x   x   x  
Process evaluation
Satisfaction with (pre-)treatment     x +    
Client-centeredness CCCQ    x    
Feasibility     +    
  1. x Questionnaires in patients.
  2. + Questionnaire in nurses.
  3. # Process measures.
  4. * Audiotapes.
  5. aAlongside usual care assessment.