Media attention can impede positive predictive value of clinical diagnosis of low prevalence disease

Media attention can impede positive predictive value of clinical diagnosis of low prevalence disease
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  1. Daniel J Chivers, foundation year 2 doctor
  1. Sheffield, UK
  1. djchivers307{at}gmail.com

Smout and colleagues say that during periods of high prevalence of pertussis the positive predictive value of a clinical diagnosis is greater than when the prevalence is low.1 While this is a mathematical certainty, recent …



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