Development and content validity of the Abilitator – a self-report questionnaire on work ability and functioning aimed at the population in a weak labour market position

Abstract

Background The unemployed have lower work ability and poorer health than the employed. This situation deteriorates when unemployment continues. The long-term unemployed often have co-morbidities and face many other challenges. This increases the need for a multidimensional assessment of work ability and functioning in different service settings. In this study, we describe the development and analyse the content validity of the Abilitator, a self-report questionnaire on work ability and functioning for those in a weak labour market position. Methods The Abilitator was developed in 2014–2017. Its construct was assessed by the members of academic expert panels (n=30), practical expert panels of service actors (n=700) and target group clients (n=28). The structure and the content of the questionnaire was co-developed in 29 workshops and adjusted twice based on the expert panels’ feedback. The Abilitator was also implemented among target group clients (n=3360) in different services and projects. During its development the Abilitator was linked to the International Classification of Functioning, Disability and Health (ICF). The content validation process followed the guidelines recommended by the Consensus-based Standards for the selection of health Measurement Instruments (COSMIN) panel. Results The construct of the Abilitator combines the multidimensional and bio-psycho-social models of work ability and functioning. It also includes aspects of social inclusion and employability. It evaluates social, psychological, cognitive and physical functioning, and the ability to cope with everyday life. The content of these concepts was validated by the academic and practical expert panels. The Abilitator’s 79 ICF codes covered 50% of the Generic, 73% of the Brief Vocational Rehabilitation, and 17% of the Minimal Environmental ICF Core Sets. When compared with the Work Ability Index (WAI) and the World Health Organization Disability Assessment Schedule (WHODAS 2.0), the direct equivalences of the ICF codes were 29% and 39%, respectively. Conclusions The Abilitator covers the relevant aspects sufficiently comprehensively to enable the assessment of the overall work ability and functioning of the population with weak position in the labour market.