Updated cerebrospinal fluid total protein reference values improve chronic inflammatory demyelinating polyneuropathy diagnosis

Ari Breiner, Pierre R. Bourque, Jeffrey A. Allen

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Introduction: Recent literature has concluded that cerebrospinal fluid total protein (CSF-TP) upper reference limits (URL) should be higher than 45 mg/dl and stratified by age. Methods: Data-driven URLs were applied to the analysis of a cohort of patients with correctly and incorrectly diagnosed chronic inflammatory demyelinating polyneuropathy (CIDP). Descriptive statistics were calculated, and exploratory analyses were used to test the impact of different CSF-TP URLs on sensitivity and specificity of CIDP diagnosis. Results: The adoption of higher and age-dependent CSF-TP URLs reduced the sensitivity of CSF analysis slightly (from 95% to 84%-86%); however, the overall CIDP detection rate was unchanged. Twelve of 36 (33%) false-positive diagnoses occurred with CSF-TP elevation as the sole supportive criteria. By applying updated CSF-TP URLs, the specificity of CSF analysis increased from 39% to 57%-64%. Discussion: Implementation of data-driven CSF-TP URLs improves CIDP diagnostic specificity without compromising sensitivity, thereby lessening CIDP misdiagnosis. Muscle Nerve 60: 180–183, 2019.

Original languageEnglish (US)
Pages (from-to)180-183
Number of pages4
JournalMuscle and Nerve
Volume60
Issue number2
DOIs
StatePublished - Aug 2019

Keywords

  • CIDP
  • CSF analysis
  • CSF protein
  • cytoalbuminological dissociation
  • diagnosis
  • neuropathy

PubMed: MeSH publication types

  • Journal Article

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