The Functional Independence Measure 18-item version can be reported as a unidimensional interval-scaled metric: Internal construct validity revisited.

CONCLUSION: This study provides evidence that FIM™ total scores represent a unidimensional set of items, supporting their use in clinical practice and outcome reporting when applying the respective transformation table. This provides a basis for standardized reporting of functioning. PMID: 30843597 [PubMed - as supplied by publisher]
Source: Journal of Rehabilitation Medicine - Category: Rehabilitation Tags: J Rehabil Med Source Type: research