Results 31 to 40 of about 1,298,216 (229)
Diagnostic tests: how to estimate the positive predictive value [PDF]
Neuro-Oncology Practice, 2015 Abstract When a patient receives a positive test result from a diagnostic test they assume they have the disease. However, the positive predictive value (PPV), ie the probability that they have the disease given a positive test result, is rarely equal to one.
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Analysis of Predictive Values Based on Individual Risk Factors in Multi-Modality Trials
Diagnostics, 2013 The accuracy of diagnostic tests with binary end-points is most frequently measured by sensitivity and specificity. However, from the clinical perspective, the main purpose of a diagnostic agent is to assess the probability of a patient actually being ...
Katharina Lange, Edgar Brunner
doaj +1 more source
Proof of the Standard Quantum Limit for Monitoring Free-Mass Position [PDF]
, 2010 The measurement result of the moved distance for a free mass m during the time t between two position measurements cannot be predicted with uncertainty smaller than sqrt{hbar t/2m}. This is formulated as a standard quantum limit (SQL) and it has been proven to always hold for the following position measurement: a probe is set in a prescribed position ...
arxiv +1 more source
Positive Predictive Value of BI-RADS MR Imaging [PDF]
Radiology, 2012 To evaluate the positive predictive values (PPVs) of Breast Imaging and Reporting Data Systems (BI-RADS) assessment categories for breast magnetic resonance (MR) imaging and to identify the BI-RADS MR imaging lesion features most predictive of cancer.This institutional review board-approved HIPAA-compliant prospective multicenter study was performed ...
Constance D. Lehman +4 more
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Derivation of Generalized Equations for the Predictive Value of Sequential Screening Tests [PDF]
arXiv, 2020 Using Bayes' Theorem, we derive generalized equations to determine the positive and negative predictive value of screening tests undertaken sequentially. Where a is the sensitivity, b is the specificity, $\phi$ is the pre-test probability, the combined positive predictive value, $\rho(\phi)$, of $n$ serial positive tests, is described by: $\rho(\phi)
arxiv
Positive predictive value of optometrist‐initiated referrals for glaucoma [PDF]
Ophthalmic and Physiological Optics, 1999 SummaryA study was conducted at the Moorfields Community Eye Clinic at Ealing Hospital to determine the positive predictive value (ppv) of optometric referrals for suspected glaucoma. The information reported in the referrals and the reasons given for referral were also assessed and evaluated in relation to the ppv.
Ian Murdoch, Julia Theodossiades
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The Positive Predictive Value of Diagnostic Ultrasound for Occult Herniae [PDF]
The Annals of The Royal College of Surgeons of England, 2006 INTRODUCTION The aim of this study is to ascertain the accuracy of diagnostic ultrasound in the assessment of the occult abdominal and groin herniae. The authors have previously demonstrated its efficacy in diagnosing the type of clinical groin herniae but occult herniae provide a further diagnostic problem.
A Roe +3 more
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A Threshold-free Prospective Prediction Accuracy Measure for Censored Time to Event Data [PDF]
Statistics in Medicine 37(10):1671-1681, 2018, 2016 Prediction performance of a risk scoring system needs to be carefully assessed before its adoption in clinical practice. Clinical preventive care often uses risk scores to screen asymptomatic population. The primary clinical interest is to predict the risk of having an event by a pre-specified future time $t_0$.
arxiv +1 more source
Generalized oscillator strength for Na 3s-3p transition [PDF]
Phys Rev A Rapid Communications, vol 61, published 3 Feb, 2000, 2000 Generalized oscillator strengths (GOS's) for the Na $3s -3p$ transition have been investigated using the spin-polarized technique of the random phase approximation with exchange (RPAE) and the first Born approximation (FBA), focussing our attention on the position of the minimum.
arxiv +1 more source
Entropy, 2020 The predictive receiver operating characteristic (PROC) curve differs from the more well-known receiver operating characteristic (ROC) curve in that it provides a basis for the evaluation of binary diagnostic tests using metrics defined conditionally on ...
Gareth Hughes +2 more
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