ArticleJournal of hand therapy : official journal of the American Society of Hand Therapists
Thumb carpometacarpal palmar and radial abduction in adults with thumb carpometacarpal joint pain: Inter-rater reliability and precision of the inter-metacarpal distance method.
Article in Journal of hand therapy : official journal of the American Society of Hand Therapists. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed, 5 citations in OpenAlex.
- Assessing active thumb palmar and radial abduction in persons with thumb carpometacarpal osteoarthritis via intermetacarpal distance methods: an exploration of validity, reliability, and precision.Clinical rheumatology · 2026Article
- The intermetacarpal distance method for assessment of active thumb radial abduction has excellent test-retest agreement, reliability, and precision in persons with non-operative thumb carpometacarpal osteoarthritis.Journal of hand therapy : official journal of the American Society of Hand TherapistsArticle
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
Abstract
STUDY
designPsychometric study of inter-rater reliability.
introductionFunctional use of the thumb can be limited in individuals with thumb carpometacarpal (CMC) osteoarthritis(OA), especially in the presence of a thumb adduction contracture. Goniometry is a common method of assessing palmar and radial abduction of the thumb base and can be used as a method of determining effectiveness of an intervention for adduction contracture. However, goniometry for the assessment of these motions has been shown to have low to moderate reliability. The intermetacarpal distance (IMD) measurement method has been shown to be the most reliable for measuring CMC palmar abduction in individuals with healthy hands but has not been studied in persons with thumb CMC OA. PURPOSES: The purpose of this study was to determine the inter-rater reliability and precision of the inter-metacarpal distance method for measuring palmar and radial abduction in persons with symptoms of thumb CMC OA.
methodsTwo trained hand therapists utilized the IMD method to measure palmar and radial abduction in the affected hands of 22 subjects (28 thumbs) with a physician-confirmed diagnosis or positive provocative test consistent with a diagnosis of thumb CMC OA. The intraclass correlation coefficient (ICC
resultsIntraclass correlation coefficients for both radial and palmar abduction were found to be >.75, indicating excellent reliability. The precision of the IMD measurements were acceptable-to-excellent as evidenced by MDC% values of <30% and <10% for radial and palmar abduction respectively.
conclusionsWe present a new method for measuring thumb radial abduction. The inter-metacarpal distance method has excellent inter-rater reliability and acceptable-to-excellent precision when measuring palmar and radial abduction in individuals with or suspected to have thumb CMC OA. Currently, it is the most reliable tool for measuring thumb abduction.
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