keyword
MENU ▼
Read by QxMD icon Read
search

Bayesian probability diagnosis

keyword
https://www.readbyqxmd.com/read/29242838/a-dirichlet-multinomial-bayes-classifier-for-disease-diagnosis-with-microbial-compositions
#1
Xiang Gao, Huaiying Lin, Qunfeng Dong
Dysbiosis of microbial communities is associated with various human diseases, raising the possibility of using microbial compositions as biomarkers for disease diagnosis. We have developed a Bayes classifier by modeling microbial compositions with Dirichlet-multinomial distributions, which are widely used to model multicategorical count data with extra variation. The parameters of the Dirichlet-multinomial distributions are estimated from training microbiome data sets based on maximum likelihood. The posterior probability of a microbiome sample belonging to a disease or healthy category is calculated based on Bayes' theorem, using the likelihood values computed from the estimated Dirichlet-multinomial distribution, as well as a prior probability estimated from the training microbiome data set or previously published information on disease prevalence...
November 2017: MSphere
https://www.readbyqxmd.com/read/29216851/what-does-igra-testing-add-to-the-diagnosis-of-ocular-tuberculosis-a-bayesian-latent-class-analysis
#2
Rupesh Agrawal, Robert Grant, Bhaskar Gupta, Dinesh Visva Gunasekeran, Julio J Gonzalez-Lopez, Peter K F Addison, Mark Westcott, Carlos E Pavesio
BACKGROUND: To evaluate the contribution made to the diagnostic work-up for patients with suspected ocular tuberculosis (TB) by QuantiFERON-TB Gold In-Tube (QFT) tests using latent class analysis model. METHODS: A single centre retrospective cohort study. A Bayesian latent class model was constructed on the basis of demographics, phenotypes and test results from patients attending a tertiary referral center in the UK. This estimated the probability of ocular TB for each patient in two versions, first with and then without QFT...
December 8, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29121922/assisting-differential-clinical-diagnosis-of-cattle-diseases-using-smartphone-based-technology-in-low-resource-settings-a-pilot-study
#3
Tariku Jibat Beyene, Amanuel Eshetu, Amina Abdu, Etenesh Wondimu, Ashenafi Feyisa Beyi, Takele Beyene Tufa, Sami Ibrahim, Crawford W Revie
BACKGROUND: The recent rise in mobile phone use and increased signal coverage has created opportunities for growth of the mobile Health sector in many low resource settings. This pilot study explores the use of a smartphone-based application, VetAfrica-Ethiopia, in assisting diagnosis of cattle diseases. We used a modified Delphi protocol to select important diseases and Bayesian algorithms to estimate the related disease probabilities based on various clinical signs being present in Ethiopian cattle...
November 9, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29091206/dynamics-and-phylogenetic-relationships-of-hiv-1-transmitted-drug-resistance-according-to-subtype-in-italy-over-the-years-2000-14
#4
L Fabeni, C Alteri, D Di Carlo, N Orchi, L Carioti, A Bertoli, C Gori, F Forbici, F Continenza, G Maffongelli, C Pinnetti, A Vergori, A Mondi, A Ammassari, V Borghi, M Giuliani, G De Carli, S Pittalis, S Grisetti, A Pennica, C M Mastroianni, F Montella, A Cristaudo, C Mussini, E Girardi, M Andreoni, A Antinori, F Ceccherini-Silberstein, C F Perno, M M Santoro
Background: Transmitted drug-resistance (TDR) remains a critical aspect for the management of HIV-1-infected individuals. Thus, studying the dynamics of TDR is crucial to optimize HIV care. Methods: In total, 4323 HIV-1 protease/reverse-transcriptase sequences from drug-naive individuals diagnosed in north and central Italy between 2000 and 2014 were analysed. TDR was evaluated over time. Maximum-likelihood and Bayesian phylogenetic trees with bootstrap and Bayesian-probability supports defined transmission clusters...
October 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29059331/automated-influenza-case-detection-for-public-health-surveillance-and-clinical-diagnosis-using-dynamic-influenza-prevalence-method
#5
Fuchiang Tsui, Y Ye, Victor Ruiz, Gregory F Cooper, Michael M Wagner
Objectives: To assess the performance of a Bayesian case detector (BCD) for influenza surveillance and clinical diagnosis. Methods: BCD uses a Bayesian network classifier to compute the posterior probability of a patient having influenza based on 31 findings from narrative clinical notes. To assess the potential for disease surveillance, we calculated area under the receiver operating characteristic curve (AUC) to indicate BCD's ability to differentiate between influenza and non-influenza encounters in emergency department settings...
October 20, 2017: Journal of Public Health
https://www.readbyqxmd.com/read/29032721/estimation-of-sensitivity-and-specificity-of-pregnancy-diagnosis-using-transrectal-ultrasonography-and-elisa-for-pregnancy-associated-glycoprotein-in-dairy-cows-using-a-bayesian-latent-class-model
#6
R W Shephard, J M Morton
AIMS: To determine the sensitivity (Se) and specificity (Sp) of pregnancy diagnosis using transrectal ultrasonography and an ELISA for pregnancy-associated glycoprotein (PAG) in milk, in lactating dairy cows in seasonally calving herds approximately 85-100 days after the start of the herd's breeding period. METHODS: Paired results were used from pregnancy diagnosis using transrectal ultrasonography and ELISA for PAG in milk carried out approximately 85 and 100 days after the start of the breeding period, respectively, from 879 cows from four herds in Victoria, Australia...
January 2018: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/29030419/accuracy-of-clinical-diagnosis-of-dementia-with-lewy-bodies-a-systematic-review-and-meta-analysis
#7
Giovanni Rizzo, Simona Arcuti, Massimiliano Copetti, Maria Alessandria, Rodolfo Savica, Andrea Fontana, Rocco Liguori, Giancarlo Logroscino
BACKGROUND: The diagnosis of dementia with Lewy bodies (DLB) is based on diagnostic clinical criteria, which were updated over the years. OBJECTIVE: To evaluate, through a systematic review, accuracy of the diagnostic criteria, testing a possible improvement over time. METHODS: We searched on MEDLINE and SCOPUS databases for studies reporting diagnostic parameters regarding the clinical diagnosis of DLB until October 2016. We performed meta-analysis, using a Bayesian approach, on those using pathological examination as gold standard, subclassified based on the different diagnostic criteria used...
October 13, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29029359/a-probabilistic-network-for-the-diagnosis-of-acute-cardiopulmonary-diseases
#8
Alessandro Magrini, Davide Luciani, Federico M Stefanini
In this paper, the development of a probabilistic network for the diagnosis of acute cardiopulmonary diseases is presented in detail. A panel of expert physicians collaborated to specify the qualitative part, which is a directed acyclic graph defining a factorization of the joint probability distribution of domain variables into univariate conditional distributions. The quantitative part, which is a set of parametric models defining these univariate conditional distributions, was estimated following the Bayesian paradigm...
October 13, 2017: Biometrical Journal. Biometrische Zeitschrift
https://www.readbyqxmd.com/read/29020131/data-adaptive-estimation-for-double-robust-methods-in-population-based-cancer-epidemiology-risk-differences-for-lung-cancer-mortality-by-emergency-presentation
#9
Miguel Angel Luque-Fernandez, Aurélien Belot, Linda Valeri, Giovanni Ceruli, Camille Maringe, Bernard Rachet
We propose a structural framework for population-based cancer epidemiology and evaluate the performance of double-robust estimators for a binary exposure in cancer mortality. We performed numerical analyses to study the bias and efficiency of these estimators. Furthermore, we compared two different model selection strategies based on 1) the Akaike and Bayesian Information Criteria and 2) machine-learning algorithms, and illustrated double-robust estimators' performance in a real setting. In simulations with correctly specified models and near-positivity violations, all but the naïve estimators presented relatively good performance...
September 11, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28988525/the-role-of-biofilm-forming-on-mortality-in-patients-with-candidemia-a-study-derived-from-real-world-data
#10
Carlo Tascini, Emanuela Sozio, Laura Corte, Francesco Sbrana, Claudio Scarparo, Andrea Ripoli, Giacomo Bertolino, Maria Merelli, Enrico Tagliaferri, Antonio Corcione, Matteo Bassetti, Gianluigi Cardinali, Francesco Menichetti
BACKGROUND: Evaluation of the role on patient mortality exerted by biofilm forming (BF) Candida strains, by using predictive clinical data. METHODS: Eighty-nine strains isolated from Candida bloodstream infection, occurring in two Italian University Hospitals, were employed in this study. A random forest (RF) model was built with a procedure of iterative selection of the risk factors potentially able to predict the probability of death. The similarity between patient conditions and Bayesian clustering was calculated in order to evaluate the role of predictors in the stratification of the death risk...
October 9, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28941736/a-prognostic-tool-to-predict-outcomes-in-children-undergoing-the-norwood-operation
#11
Punkaj Gupta, Avishek Chakraborty, Jeffrey M Gossett, Mallikarjuna Rettiganti
OBJECTIVES: To create and validate a prediction model to assess outcomes associated with the Norwood operation. METHODS: The public-use dataset from a multicenter, prospective, randomized single-ventricle reconstruction trial was used to create this novel prediction tool. A Bayesian lasso logistic regression model was used for variable selection. We used a hierarchical framework by representing discrete probability models with continuous latent variables that depended on the risk factors for a particular patient...
August 30, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28903866/a-bayesian-latent-class-model-to-estimate-the-accuracy-of-pregnancy-diagnosis-by-transrectal-ultrasonography-and-laboratory-detection-of-pregnancy-associated-glycoproteins-in-dairy-cows
#12
G T Fosgate, B Motimele, A Ganswindt, P C Irons
Accurate diagnosis of pregnancy is an essential component of an effective reproductive management plan for dairy cattle. Indirect methods of pregnancy detection can be performed soon after breeding and offer an advantage over traditional direct methods in not requiring an experienced veterinarian and having potential for automation. The objective of this study was to estimate the sensitivity and specificity of pregnancy-associated glycoprotein (PAG) detection ELISA and transrectal ultrasound (TRUS) in dairy cows of South Africa using a Bayesian latent class approach...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28844720/development-and-standardization-of-an-in-house-indirect-elisa-for-detection-of-duck-antibody-to-fowl-cholera
#13
Pichayanut Poolperm, Thanya Varinrak, Yasushi Kataoka, Khajornsak Tragoolpua, Takuo Sawada, Nattawooti Sthitmatee
Serological tests, such as agglutination and indirect hemagglutination assay (IHA), have been used to identify antibodies against Pasteurella multocida in poultry sera, but none are highly sensitive. An enzyme-linked immunosorbent assays (ELISA) has been used with varying degrees of success in attempts to monitor seroconversion in vaccinated poultry, but are not suitable for diagnosis. Commercial ELISA kits are available for chickens and turkeys, but not for ducks. The present study reports development and standardization of an in-house indirect ELISA for detection of duck antibody to fowl cholera...
November 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28752323/bone-tumor-diagnosis-using-a-na%C3%A3-ve-bayesian-model-of-demographic-and-radiographic-features
#14
Bao H Do, Curtis Langlotz, Christopher F Beaulieu
Because many bone tumors have a variety of appearances and are uncommon, few radiologists develop sufficient expertise to guide optimal management. Bayesian inference can guide decision-making by computing probabilities of multiple diagnoses to generate a differential. We built and validated a naïve Bayes machine (NBM) that processes 18 demographic and radiographic features. We reviewed over 1664 analog radiographic cases of bone tumors and selected 811 cases (66 diagnoses) for annotation using a quantitative imaging platform...
July 27, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/28690054/fuzzy-evidential-network-and-its-application-as-medical-prognosis-and-diagnosis-models
#15
Amin Janghorbani, Mohammad Hassan Moradi
Uncertainty is one of the important facts of the medical knowledge. Medical prognosis and diagnosis, as the essential parts of medical knowledge, is affected by different aspects of uncertainty, which must be managed. In the previous studies, different theories such as Bayesian probability theory, evidence theory, and fuzzy set theory have been developed to represent and manage different aspects of uncertainty. Recently, hybrid frameworks are suggested to deal with various types of uncertainty in a single framework...
July 6, 2017: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/28408880/a-bayesian-model-for-the-prediction-and-early-diagnosis-of-alzheimer-s-disease
#16
Athanasios Alexiou, Vasileios D Mantzavinos, Nigel H Greig, Mohammad A Kamal
Alzheimer's disease treatment is still an open problem. The diversity of symptoms, the alterations in common pathophysiology, the existence of asymptomatic cases, the different types of sporadic and familial Alzheimer's and their relevance with other types of dementia and comorbidities, have already created a myth-fear against the leading disease of the twenty first century. Many failed latest clinical trials and novel medications have revealed the early diagnosis as the most critical treatment solution, even though scientists tested the amyloid hypothesis and few related drugs...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28397168/can-a-bayesian-belief-network-be-used-to-estimate-1-year-survival-in-patients-with-bone-sarcomas
#17
Rajpal Nandra, Michael Parry, Jonathan Forsberg, Robert Grimer
BACKGROUND: Extremity sarcoma has a preponderance to present late with advanced stage at diagnosis. It is important to know why these patients die early from sarcoma and to predict those at high risk. Currently we have mid- to long-term outcome data on which to counsel patients and support treatment decisions, but in contrast to other cancer groups, very little on short-term mortality. Bayesian belief network modeling has been used to develop decision-support tools in various oncologic diagnoses, but to our knowledge, this approach has not been applied to patients with extremity sarcoma...
June 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28384010/placebo-response-in-pediatric-anxiety-disorders-results-from-the-child-adolescent-anxiety-multimodal-study
#18
Jeffrey R Strawn, Eric T Dobson, Jeffrey A Mills, Gary J Cornwall, Dara Sakolsky, Boris Birmaher, Scott N Compton, John Piacentini, James T McCracken, Golda S Ginsburg, Phillip C Kendall, John T Walkup, Anne Marie Albano, Moira A Rynn
OBJECTIVES: The aim of this study is to identify predictors of pill placebo response and to characterize the temporal course of pill placebo response in anxious youth. METHODS: Data from placebo-treated patients (N = 76) in the Child/Adolescent Anxiety Multimodal Study (CAMS), a multisite, randomized controlled trial that examined the efficacy of cognitive-behavioral therapy, sertraline, their combination, and placebo for the treatment of separation, generalized, and social anxiety disorders, were evaluated...
August 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/28279374/the-quantitative-science-of-evaluating%C3%A2-imaging-evidence
#19
REVIEW
Tessa S S Genders, Bart S Ferket, M G Myriam Hunink
Cardiovascular diagnostic imaging tests are increasingly used in everyday clinical practice, but are often imperfect, just like any other diagnostic test. The performance of a cardiovascular diagnostic imaging test is usually expressed in terms of sensitivity and specificity compared with the reference standard (gold standard) for diagnosing the disease. However, evidence-based application of a diagnostic test also requires knowledge about the pre-test probability of disease, the benefit of making a correct diagnosis, the harm caused by false-positive imaging test results, and potential adverse effects of performing the test itself...
March 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28236025/incremental-diagnostic-quality-gain-of-cta-over-v-q-scan-in-the-assessment-of-pulmonary-embolism-by-means-of-a-wells-score-bayesian-model-results-from-the-acdc-collaboration
#20
Laila Cochon, Kaitlin McIntyre, José M Nicolás, Amado Alejandro Baez
OBJECTIVE: Our objective was to evaluate the diagnostic value of computed tomography angiography (CTA) and ventilation perfusion (V/Q) scan in the assessment of pulmonary embolism (PE) by means of a Bayesian statistical model. METHODS: Wells criteria defined pretest probability. Sensitivity and specificity of CTA and V/Q scan for PE were derived from pooled meta-analysis data. Likelihood ratios calculated for CTA and V/Q were inserted in the nomogram. Absolute (ADG) and relative diagnostic gains (RDG) were analyzed comparing post- and pretest probability...
August 2017: Emergency Radiology
keyword
keyword
76673
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"