Seminar Presentation 2-1

2-1 (Presentation within Topical Seminar 2):
Reliability, validity and responsiveness of the Spanish version of the work role functioning questionnaire

Presented by: José M Ramada Rodilla

Authors

Ramada Rodilla JM1,2, Serra Pujadas C1,2, Amick III B3,4, Bültmann U4,5, Delclos Clanchet GL1,6

  1. CiSAL - Center for Research in Occupational Health. University Pompeu Fabra. Barcelona, Spain
  2. Occupational Health Service. Parc de Salut Mar. Barcelona, Spain
  3. Institute for Work & Health, Toronto, Canada
  4. Department of Health Policy and Management, Robert Stempel College of Public Health & Social Work. Florida International University, Miami, USA
  5. Department of Health Sciences, Community and Occupational Medicine, University Medical Center Groningen, University of Groningen. Groningen, The Netherlands
  6. Southwest Center for Occupational and Environmental Health, the University of Texas School of Public Health. Houston, USA.

Abstract

Background

Health-related work functioning is the worker’s ability to meet job demands for a given health status. Quality validated measurement tools are needed to assess how workers function at work along their professional life and to evaluate interventions to adapt job conditions to the worker’s skills and health. The Work Role Functioning Questionnaire (WRFQ) is an instrument to measure self-perceived difficulties to meet job demands in active workers; given a certain health status. The WRFQ has an evidence base of quality studies assessing its measurement properties in different languages, but not yet in Spanish. Hence, the aim of this study was to validate the WRFQ in a general working Spanish-speaking population (WRFQ-SpV).

Methods

A cross-sectional study was conducted among 455 active workers of a general working population to evaluate the reliability and validity of the WRFQ-SpV. A longitudinal survey with 102 participants was carried out to examine responsiveness. The consensus-based standards on measurement properties of measurement tools (COSMIN) guided the design of the process.

Results

The WRFQ-SpV showed adequate applicability, good face and content validity. Internal consistency was very good (Cronbach alpha=0.98). The original five factor structure of the WRFQ-SpV reflected fair dimensionality of the construct (Chi square, 1445.8; 314 degrees of freedom; root mean square error of approximation [RMSEA] =0.08; comparative fit index [CFI] >0.95 and weighed root mean residual [WRMR]>0.90). The test–retest reliability showed good reproducibility of the outcomes (0.77 ≤ intraclass correlation coefficient [ICC]≤0.93) and standard error of measurement [SEM]=7.10). For construct validation, all formulated hypotheses were confirmed differentiating groups with different jobs, health conditions and ages. Seven hypotheses (out of six) were confirmed, verifying that the WRFQ-SpV was able to detect true changes over time.

Conclusions

The WRFQ-SpV is a reliable and valid instrument to measure health-related work functioning in daily practice and research in occupational health. Suggestive evidence about its possible use in evaluative studies was found. More research is needed to examine the instrument responsiveness for groups who do not experience health improvement or deteriorate.