Research Article

Test reduction: I--Introduction and review of published work.

Br Med J 1980; 281 doi: (Published 23 August 1980) Cite this as: Br Med J 1980;281:543
  1. W I Card,
  2. P A Emerson


    The word "test" is used in a more general sense to describe the process of eliciting evidence of any kind from a patient, and this paper explores the thesis that much evidence is unnecessary and that therefore much test reduction is possible. The value of test reduction can be measured by its efficiency--that is, its effect on the misclassification of disease--or, preferably, by some measure of its cost-effectiveness.