Letters Solitary pulmonary nodule

Likelihood ratios are not good for differential diagnosis

BMJ 2012; 344 doi: https://doi.org/10.1136/bmj.e3660 (Published 28 May 2012) Cite this as: BMJ 2012;344:e3660
  1. Huw Llewelyn, general physician and endocrinologist1
  1. 1Nevill Hall Hospital, Abergavenny NP7 7EG, UK
  1. hul2{at}aber.ac.uk

Likelihood ratios as quoted by McNulty and colleagues in the table of their article on rational imaging of solitary pulmonary nodules cannot be used in differential diagnostic reasoning.1 2 Likelihood ratios represent the frequency of each finding (such as haemoptysis) in those with a diagnosis (such as malignant pulmonary nodule) …

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