The experience of having psoriasis through the lens of the International Classification of Functioning, Disability and Health (ICF)
The International Classification of Functioning, Disability and Health (ICF) was developed by the World Health Organization to comprehensively describe the ways that health conditions can affect people. The identification of ICF categories of most relevance to people with a particular disease can increase the usefulness of the ICF and create a reference for outcome studies. This study aimed to ascertain, through focus group interviews with psoriasis patients and an online Delphi survey with health professionals, the impacts of psoriasis as categorised by the ICF.We conducted and transcribed verbatim focus group interviews with 32 outpatients with psoriasis from two New Zealand cities. The interview transcripts were analysed to yield meaning units and concepts contained in the meaning units were extracted. These concepts were linked to ICF categories. An online Delphi survey among 23 health professionals was conducted to obtain similar information. The ICF categories were rated for their perceived relevance to psoriasis by health professionals over three iterations.In total, 32 patients participated in six focus groups. Interview saturation was reached after five focus groups. The concepts were linked to 83 ICF categories and two separate health conditions. Among health professionals, 167 ICF categories were rated, mostly in the moderately relevant (four to six) range.Applying the established method of meaning condensation to focus group interview transcripts allowed the accurate linking of concepts to ICF categories. This will be of use to researchers developing the first ICF core set for psoriasis in the future.