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Noise-induced hearing loss: the diagnosis depends on the doctor’s belief
  1. Bo Engdahl
  1. Correspondence to Dr Bo Engdahl, Division of Mental Health, Norwegian Institute of Public Health, Box 4404 Nydalen, Oslo 0403, Norway; bo.engdahl{at}

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Schink et al1 state that musicians more often than others are diagnosed with noise-induced hearing loss (NIHL), reporting a HR of 3.6. In addition to reporting a slightly increased risk of being diagnosed with tinnitus, the authors conclude that “Professional musicians have a high risk of contracting hearing disorders”. Although the findings appear convincing, I think the results should be interpreted otherwise.

The high risk of differential misclassification in the outcome seems overlooked. As NIHL …

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  • Competing interests None.

  • Provenance and peer review Not commissioned; internally peer reviewed.

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