Presentation M P26

M P26 (Poster Presentation):
A weighted composite measure for the assessment of the work functioning of health-impaired workers

Presented by: Edwin Boezeman


Boezeman EJ1, Nieuwenhuijsen K1, De Bekker-Grob E2, Sluiter, JK1

  1. Coronel Institute of Occupational Health, Academic Medical Center, University of Amsterdam, Amsterdam
  2. Department of Public Health, Erasmus Medical Center, Erasmus University Rotterdam, Rotterdam, The Netherlands



Researchers and practitioners invest effort to help health-impaired workers function at work. Yet, the concept work functioning has multiple indicators and the relative importance of its indicators is unclear. To offer researchers and practitioners a measure for adequate measurement of the work functioning of health-impaired workers a weighted composite work functioning measure was developed and validated.


A discrete choice experiment was conducted and a regression model tested to uncover the relative importance of central indicators of work functioning. Participants were health-impaired workers, healthy workers, and supervisors (n = 277). Subsequently, the composite measure was constructed and its weighed composite score validated. Workers (health-impaired/healthy) (n = 117) completed the WRFQ, a ProDISQ productivity module, the SF12, and the composite measure survey. The composite measure consisted of the WLQ physical and mental-interpersonal subscales (capacity to work), the WLQ output subscale (quantity of work), the TPCQ inrole and extra-role subscales (quality of work performance), and the need for recovery subscale (personal costs of work). Reliability analyses were used for examining internal consistency, correlation analyses for examining construct validity, and T-tests for examining discriminative validity.


Health-impaired workers, healthy workers, and supervisors, all consider quality of work performance relatively the best indicator of work functioning, followed by personal costs of work, quantity of work, and capacity to work. The composite measure items correlate strongly with each other (internal consistency). The composite score correlates strongly with work role functioning and less strongly with productivity (convergent validity), and moderately with physical quality of life and somewhat strongly with mental quality of life (divergent validity). The composite measure detected (discriminative validity) that health-impaired workers score significantly worse on work functioning than healthy workers.


The composite measure has adequate psychometric properties, covers multiple aspects of work functioning, and corrects for the relative importance of the aspects of work functioning, hence it adequately records work functioning.

Schedule Details

Monday September 29
12:45 - 13:45 Poster Viewing
Session: Disability measurement