[A new concept and method of standardizing predictive value].

A new concept and method of standardizing predictive value was put forward. The theoretical predictive value which was not affected by prevalence rate or different component in normal and abnormal groups and was gotten under the appointed standardizing condition that made the cases in the two groups to be same with each other and to be called standardizing component was defined as standardizing predictive value. The value will change only with the change of sensitivity and specificity of diagnostic test. By the new concept and method, the value of diagnostic test can be explained, judged and expressed in unique standard.