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Carpal tunnel syndrome diagnosis in occupational epidemiological studies
  1. F S Violante1,
  2. R Bonfiglioli1,
  3. M Hagberg2,
  4. D Rempel3
  1. 1Department of Medical and Surgical Science, Occupational Medicine, Alma Mater Studiorum University of Bologna, Bologna, Italy
  2. 2Department of Public Health and Community Medicine, Occupational and Environmental Medicine, University of Gothenburg (UGOT), Gothenburg, Sweden
  3. 3Division of Occupational and Environmental Medicine, University of California, San Francisco, USA
  1. Correspondence to Dr Roberta Bonfiglioli, Occupational Health Unit, University of Bologna, Sant'Orsola Malpighi Hospital, via Palagi 9, Bologna 40138, Italy; roberta.bonfiglioli{at}unibo.it

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The problem of the possible over-diagnosis of carpal tunnel syndrome (CTS) has been raised in the Occup Environ Med.13 CTS, like almost all medical conditions, occurs along a spectrum of presentation, progression and severity and, therefore, the alignment between symptoms, signs and objective tests is imperfect. A finding often misunderstood and reported in general population and workplace studies, is the dissociation between CTS symptoms and median nerve conduction slowing at the wrist.47 CTS symptoms and nerve conduction slowing have two different mechanisms, nerve sensory fibres autonomous discharge and conduction block (and or slowing) of the fastest nerve fibres. The two phenomena are likely due to the same causal factor, for example, compression of the median nerve in the …

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