دانلود Comparing diagnostic tests: test of hypothesis for likelihood ratios

ترجمه مقاله Comparing diagnostic tests: test of hypothesis for likelihood ratios
قیمت : 360,000 ریال
شناسه محصول : 2009626
نویسنده/ناشر/نام مجله : Journal of Statistical Computation and Simulation
سال انتشار: 2012
تعداد صفحات انگليسي : 14
نوع فایل های ضمیمه : pdf+word
حجم فایل : 414 Kb
کلمه عبور همه فایلها : www.daneshgahi.com
عنوان انگليسي : Comparing diagnostic tests: test of hypothesis for likelihood ratios

چکیده

Abstract

Likelihood ratios (LRs) are used to characterize the efficiency of diagnostic tests. In this paper, we use the classical weighted least squares (CWLS) test procedure, which was originally used for testing the homogeneity of relative risks, for comparing the LRs of two or more binary diagnostic tests. We compare the performance of this method with the relative diagnostic likelihood ratio (rDLR) method and the diagnostic likelihood ratio regression (DLRReg) approach in terms of size and power, and we observe that the performances of CWLS and rDLR are the same when used to compare two diagnostic tests, while DLRReg method has higher type I error rates and powers. We also examine the performances of the CWLS and DLRReg methods for comparing three diagnostic tests in various sample size and prevalence combinations. On the basis of Monte Carlo simulations, we conclude that all of the tests are generally conservative and have low power, especially in settings of small sample size and low prevalence.

 

Keywords: binary diagnostic tests comparing likelihood ratios classical weighted least squares
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