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Nomogram for determining the post-test probability of a target disorder.5 To determine post-test probability, a line would be drawn between the patient’s pre-test probability (left), through the LR of the diagnostic test (centre), and extended through to the post-test probability (right). Source: reprinted with permission from D.L. Sackett, S.E. Straus, W.S. Richardson, W. Rosenberg, and R.B. Haynes, Evidence-Based Medicine, 2nd ed., p. 79, M. Parkinson, © 2000 Churchill Livingstone.
