Letters Subarachnoid haemorrhage

Clinical gestalt needed

BMJ 2010; 341 doi: http://dx.doi.org/10.1136/bmj.c7404 (Published 30 December 2010) Cite this as: BMJ 2010;341:c7404
  1. Andrew P Webster, consultant in emergency medicine1
  1. 1University Hospitals of Morecambe Bay NHS Foundation Trust, UK
  1. andywebster{at}doctors.org.uk

Clinical decision instruments (not rules as they give the impression they must always be followed) are useful for answering simple questions when the instrument is short, easy to remember, and considers unambiguous questions.1

If the pre-test probability …

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