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Table 2 Overview of outcome measures and their instruments and time path

From: The effectiveness of the “Brainwork Intervention” in reducing sick leave for unemployed workers with psychological problems: design of a controlled clinical trial

  Time path
  Baseline 4 months 8 months 12 months Continuous
  T0 T1 T2 T3 (until 12 months)
Data instruments      
Dutch SSA* Database      X
Questionnaires 1 to 4 1 2 3 4  
Primary outcome      
Duration of sick leave      X
(SSA Database)      
Secondary outcome      
Proportion of subjects returned to work at 8 and 12 months (SSA Database)    X X  
Duration from transfer to the SSA until RTW (SSA Database)      X
Number of days of paid employment during follow-up   X X X  
(questionnaire and SSA database)
Degree of participation   X X X  
(questionnaire and SSA database)
Psychological complaints X X X X  
Self-efficacy for return to work X X X X  
Costs and benefits from SSA perspective      X
(SSA Database)
  1. *Dutch SSA = Dutch Social Security Agency.