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July 20, 2026NeurologyOpen Access

Rasch-Built Overall Disability Scale for Chronic Idiopathic Axonal Polyneuropathy

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Authors

GSG StarCFCatharina G. FaberPDPieter A. van Doorn

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Overview

Historic prospective cohort study develops a disability scale for chronic idiopathic axonal polyneuropathy, highlighting its importance for patient care.

Key Points

  • The aim was to construct a patient-reported Rasch-built interval scale to assess functional deficits in patients with chronic idiopathic axonal polyneuropathy.
  • Conducted a historic prospective cohort study to develop the CIAP-RODS.
  • Rasch analyses were performed on the preliminary scale of 196 items to finalize the 24-item CIAP-RODS.
  • Test-retest reliability was assessed with 150 participants responding to the pre-CIAP-RODS twice over 2-4 weeks.
  • The final CIAP-RODS comprised 24 items that met Rasch model requirements.
  • Good test-retest reliability and robust internal validity were demonstrated (person separation index 0.95).
  • Significant associations between CIAP-RODS scores and EQ-5D-3L indicated good discriminative external validity.

Cite This Study

Star et al. (2026) studied this question.

synapsesocial.com/papers/6a5dba128bd453d3397ab496https://doi.org/10.1212/wnl.0000000000218266
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