Hartz A, Centor R
Med Decis Making. 1986 Jul-Sep;6(3):149-53. doi: 10.1177/0272989X8600600304.
Previous indices for measuring the potential impact of a diagnostic test on a physician's management of a given patient were derived based on a fixed threshold model. The authors adapted these indices to a stochastic threshold model. In the stochastic threshold model the physician's probability of treating the patient is a function of the patient's probability of disease. From this model the authors derived the management value index (the expected effect that the test has on the physician's probability for treating the patient) and the utility value index (the expected benefit to the patient if the diagnostic test is used). Graphs of the indices versus the patient's probability of disease may be useful in teaching appropriate use of diagnostic tests.
先前用于衡量诊断测试对医生管理特定患者潜在影响的指标是基于固定阈值模型得出的。作者将这些指标应用于随机阈值模型。在随机阈值模型中，医生治疗患者的概率是患者患病概率的函数。作者从该模型中推导出管理价值指数（该测试对医生治疗患者概率的预期影响）和效用价值指数（如果使用诊断测试对患者的预期益处）。指标与患者患病概率的关系图可能有助于指导诊断测试的合理使用。
