The reproducibility of structured functional assessments in a social security setting: a pre-specified explanatory analysis of the RELY-studies

Evidence indicates that Functional Assessment, if carried out well, may lead to more reproducibility. This explanatory analysis revealed low to fair interrater reproducibility in mental functions (IFAP-1), in functional capacities (IFAP-2a/b) which extends to rWC. Among various other explanations, we believe this to be mostly due to insufficient training in Functional Assessment and therefore reflects real-world variability in judgment. We recommend revising training format and intensity, and monitoring adherence in practice, followed by re-evaluation of reproducibility of expert judgements. As of today, the outcome is uncertain.