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Occup Environ Med. 2010 Feb;67(2):133-5. doi: 10.1136/oem.2009.047431. Epub 2009 Oct 22.

Diagnostic strategies using physical examination are minimally useful in defining carpal tunnel syndrome in population-based research studies.

Author information

1
Occupational Health Department, Poincaré Teaching Hospital AP-HP, University of Versailles-Saint Quentin, INSERM, U687, Garches, France. alexis.descatha@rpc.aphp.fr

Abstract

OBJECTIVE:

We evaluated the utility of physical examination manoeuvres in the prediction of carpal tunnel syndrome (CTS) in a population-based research study.

METHODS:

We studied a cohort of 1108 newly employed workers in several industries. Each worker completed a symptom questionnaire, a structured physical examination and nerve conduction study. For each hand, our CTS case definition required both median nerve conduction abnormality and symptoms classified as "classic" or "probable" on a hand diagram. We calculated the positive predictive values and likelihood ratios for physical examination manoeuvres in subjects with and without symptoms.

RESULTS:

The prevalence of CTS in our cohort was 1.2% for the right hand and 1.0% for the left hand. The likelihood ratios of a positive test for physical provocative tests ranged from 2.0 to 3.3, and those of a negative test from 0.3 to 0.9. The post-test probability of positive testing was <50% for all strategies tested.

CONCLUSION:

Our study found that physical examination, alone or in combination with symptoms, was not predictive of CTS in a working population. We suggest using specific symptoms as a first-level screening tool, and nerve conduction study as a confirmatory test, as a case definition strategy in research settings.

PMID:
19854697
PMCID:
PMC2877090
DOI:
10.1136/oem.2009.047431
[Indexed for MEDLINE]
Free PMC Article

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