likehood ratio

Decision making The frequency that a test result is positive in subjects with–as opposed to without–a disease of interest; LR is a method for evaluating the informational properties of a nonbinary test Screening The relative odds that a given test result is expected in a Pt with–vs without–a disease of interest. Cf ROC curve.

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Test performance of B-line, pleural effusion, and wedge sign on 38 patients with PE Finding Sensitivity Specificity NPV PPV NLR 95% CI PLR B-line 0.28 0.45 0.5 0.28 1.63 1.17-2.28 0,48 Pleural 0.18 0.71 0.59 0.28 1.15 0.92-1.43 0,63 effusion Wedge sign 0.42 0.98 0.73 0.94 0.59 0.45-0.77 26,1 Finding 95% CI B-line 0.27-0.86 Pleural 0.29-1.38 effusion Wedge sign 3.6-188.9 NPV: negative predictive value; PPV: positive predictive value; NLR: negative likehood ratio; CI: confidence interval; PLR: positive likehood ratio; PE: pulmonary embolism

Evaluation of the Diagnostic Role of Bedside Lung Ultrasonography in Patients with Suspected Pulmonary Embolism in the Emergency Department

With high likehood ratio given level might serve as a support.

Veles Capital - Trader's daily - Apr 22, 2010

TABLE 1 Estimation Results Constant Full Sample Parameters Average [[??].sub.i]/(1 - [[??].sub.i]) -0.014 -0.011 SE [[??].sub.i]/(1 - [[??].sub.i]) 0.028 0.03 Average [[??].sub.i] 0.474 0.457 SE [[??].sub.i] 0.189 0.2 Number of firms 105 71 Number of likehood ratio 34 (32.38) test rejections, n (%) Time-Varying Parameters Average [[??].sub.0, i]/1 - [[??].sub.0, i] 0.723 SE [[??].sub.0, i]/(1 - [[??].sub.0, i]) 0.187 Average [[??].sub.0, i] -0.127 SE [[??].sub.0, i] 0.459 Number of firms 34 Number of likehood ratio test rejections, n (%) Notes: See Equations (1) and (2) for definition of parameters.