Revision of the brief international classification of functioning, disability and health core set for multiple sclerosis: a study of the comprehensive icf core set for multiple sclerosis with participants referred for work ability assessment.

Selection bias: Participants were only those referred for work capacity assessment, so results may not generalize to all people with MS, particularly those not seeking disability or work-related evaluations. Single evaluator: All ICF assessments were performed by one investigator, which introduces potential rater bias, although a strict protocol was used. Telephone interviews: Data were collected via phone rather than in-person due to pandemic restrictions, which may have limited the ability to perform certain physical assessments or observe non-verbal cues. Cross-sectional design: The study describes associations at a single point in time and cannot establish causality or track changes over time.

The authors declared no conflicts of interest. The research received funding from the European Social Fund under a grant agreement with the Research Council of Lithuania.

Do not assume these findings apply to all people with MS. The participants were specifically referred for work capacity assessment, a subgroup likely to have different impairment profiles than those not seeking such evaluation. Also, the suggestion to change the ICF Core Set is a recommendation based on this single cohort and requires validation in other settings before becoming standard practice.