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Test accuracy is example of redundant information

BMJ 1998; 316 doi: (Published 24 January 1998) Cite this as: BMJ 1998;316:312
  1. A Ralph Henderson, Professor emeritusa
  1. a Department of Biochemistry, University of Western Ontario, London, Ontario, Canada

    Editor—Greenhalgh's usual common sense seems to have deserted her when she discusses test accuracy.1 I,2 and others before me, have pointed out the inadequacy of test accuracy. Its use condenses two fundamental test variables—sensitivity and specificity—which apply to diseased and non-diseased populations, respectively. So what is the …

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