keyword
MENU ▼
Read by QxMD icon Read
search

Markov

keyword
https://www.readbyqxmd.com/read/28635371/deoxynivalenol-and-zearalenone-in-unprocessed-cereals-and-soybean-from-different-cultivation-regions-in-croatia
#1
Jelka Pleadin, Jadranka Frece, Tina Lešić, Manuela Zadravec, Nada Vahčić, Mladenka Malenica Staver, Ksenija Markov
The aim of this study was to investigate into the occurrence of deoxynivalenol (DON) and zearalenone (ZEN) in unprocessed cereals and soybean sampled in 2014 and 2015 from different fields located in Croatian regions. A total of 306 samples were analyzed for DON and 415 samples for ZEN concentrations using quantitative ELISA methods. In 2014, DON and ZEN were determined in all samples in the mean concentrations of 1,461 ± 2,265 µg/kg and 656 ± 853 µg/kg, respectively, while in 2015 these means were 2,687 ± 2,731 µg/kg and 1,140 ± 1,630 µg/kg, respectively...
June 21, 2017: Food Additives & Contaminants. Part B, Surveillance
https://www.readbyqxmd.com/read/28635362/costs-and-effectiveness-of-fingolimod-versus-alemtuzumab-in-the-treatment-of-highly-active-relapsing-remitting-multiple-sclerosis-in-the-uk-retreatment-discount-and-disutility
#2
Stephen M Montgomery, Jeanette Kusel, Richard Nicholas, Nicholas Adlard
OBJECTIVE: Patients with relapsing-remitting multiple sclerosis (RRMS) treated with disease modifying therapies (DMTs) who continue to experience disease activity may be considered for escalation therapies such as fingolimod or may be considered for alemtuzumab. Previous economic modelling used Markov models; applying one alternative technique, discrete event simulation (DES) modelling, allows retreatment and long-term adverse events (AEs) to be included in the analysis. METHODS: A DES was adapted to model relapse-triggered retreatment with alemtuzumab and the effect of including ongoing quality-adjusted life year (QALY) decrements for AEs that extend beyond previous one year Markov cycles...
June 21, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/28633604/a-two-stage-approach-to-the-joint-analysis-of-longitudinal-and-survival-data-utilising-the-coxian-phase-type-distribution
#3
Conor Donnelly, Lisa M McFetridge, Adele H Marshall, Hannah J Mitchell
The Coxian phase-type distribution is a special type of Markov model which can be utilised both to uncover underlying stages of a survival process and to make inferences regarding the rates of flow of individuals through these latent stages before an event of interest occurs. Such models can be utilised, for example, to identify individuals who are likely to deteriorate faster through a series of disease states and thus require more aggressive medical intervention. Within this paper, a two-stage approach to the analysis of longitudinal and survival data is presented...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/28632743/in-silico-assessment-of-the-effects-of-quinidine-disopyramide-and-e-4031-on-short-qt-syndrome-variant-1-in-the-human-ventricles
#4
Cunjin Luo, Kuanquan Wang, Henggui Zhang
AIMS: Short QT syndrome (SQTS) is an inherited disorder associated with abnormally abbreviated QT intervals and an increased incidence of atrial and ventricular arrhythmias. SQT1 variant (linked to the rapid delayed rectifier potassium channel current, IKr) of SQTS, results from an inactivation-attenuated, gain-of-function mutation (N588K) in the KCNH2-encoded potassium channels. Pro-arrhythmogenic effects of SQT1 have been well characterized, but less is known about the possible pharmacological antiarrhythmic treatment of SQT1...
2017: PloS One
https://www.readbyqxmd.com/read/28631197/prioritizing-future-research-on-allopurinol-and-febuxostat-for-the-management-of-gout-value-of-information-analysis
#5
Eric Jutkowitz, Fernando Alarid-Escudero, Hyon K Choi, Karen M Kuntz, Hawre Jalal
OBJECTIVES: The aim of this study was to quantify the value of conducting additional research and reducing uncertainty regarding the cost effectiveness of allopurinol and febuxostat for the management of gout. METHODS: We used a previously developed Markov model that evaluated the cost effectiveness of nine urate-lowering strategies: no treatment, allopurinol-only fixed dose (300 mg), allopurinol-only dose escalation (up to 800 mg), febuxostat-only fixed dose (80 mg), febuxostat-only dose escalation (up to 120 mg), allopurinol-febuxostat sequential therapy fixed dose, allopurinol-febuxostat sequential therapy dose escalation, febuxostat-allopurinol sequential therapy fixed dose, and febuxostat-allopurinol sequential therapy dose escalation...
June 19, 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/28630525/a-bayesian-adaptive-design-for-clinical-trials-in-rare-diseases
#6
S Faye Williamson, Peter Jacko, Sofía S Villar, Thomas Jaki
Development of treatments for rare diseases is challenging due to the limited number of patients available for participation. Learning about treatment effectiveness with a view to treat patients in the larger outside population, as in the traditional fixed randomised design, may not be a plausible goal. An alternative goal is to treat the patients within the trial as effectively as possible. Using the framework of finite-horizon Markov decision processes and dynamic programming (DP), a novel randomised response-adaptive design is proposed which maximises the total number of patient successes in the trial and penalises if a minimum number of patients are not recruited to each treatment arm...
September 2017: Computational Statistics & Data Analysis
https://www.readbyqxmd.com/read/28630425/reconstructing-cell-cycle-pseudo-time-series-via-single-cell-transcriptome-data
#7
Zehua Liu, Huazhe Lou, Kaikun Xie, Hao Wang, Ning Chen, Oscar M Aparicio, Michael Q Zhang, Rui Jiang, Ting Chen
Single-cell mRNA sequencing, which permits whole transcriptional profiling of individual cells, has been widely applied to study growth and development of tissues and tumors. Resolving cell cycle for such groups of cells is significant, but may not be adequately achieved by commonly used approaches. Here we develop a traveling salesman problem and hidden Markov model-based computational method named reCAT, to recover cell cycle along time for unsynchronized single-cell transcriptome data. We independently test reCAT for accuracy and reliability using several data sets...
June 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28629610/a-model-for-assessing-the-clinical-and-economic-benefits-of-bone-forming-agents-for-reducing-fractures-in-postmenopausal-women-at-high-near-term-risk-of-osteoporotic-fracture
#8
Claire E O'Hanlon, Anju Parthan, Morgan Kruse, Shannon Cartier, Bjorn Stollenwerk, Yawen Jiang, John P Caloyeras, Daria B Crittenden, Richard Barron
PURPOSE: The goal of this study was to assess and compare the potential clinical and economic value of emerging bone-forming agents using the only currently available agent, teriparatide, as a reference case in patients at high, near-term (imminent, 1- to 2-year) risk of osteoporotic fractures, extending to a lifetime horizon with sequenced antiresorptive agents for maintenance treatment. METHODS: Analyses were performed by using a Markov cohort model accounting for time-specific fracture protection effects of bone-forming agents followed by antiresorptive treatment with denosumab...
June 16, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28629510/screening-strategies-for-atrial-fibrillation-a-systematic-review-and-cost-effectiveness-analysis
#9
Nicky J Welton, Alexandra McAleenan, Howard Hz Thom, Philippa Davies, Will Hollingworth, Julian Pt Higgins, George Okoli, Jonathan Ac Sterne, Gene Feder, Diane Eaton, Aroon Hingorani, Christopher Fawsitt, Trudie Lobban, Peter Bryden, Alison Richards, Reecha Sofat
BACKGROUND: Atrial fibrillation (AF) is a common cardiac arrhythmia that increases the risk of thromboembolic events. Anticoagulation therapy to prevent AF-related stroke has been shown to be cost-effective. A national screening programme for AF may prevent AF-related events, but would involve a substantial investment of NHS resources. OBJECTIVES: To conduct a systematic review of the diagnostic test accuracy (DTA) of screening tests for AF, update a systematic review of comparative studies evaluating screening strategies for AF, develop an economic model to compare the cost-effectiveness of different screening strategies and review observational studies of AF screening to provide inputs to the model...
May 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28627471/phospholipid-drug-conjugates-as-a-novel-oral-drug-targeting-approach-for-the-treatment-of-inflammatory-bowel-disease
#10
Arik Dahan, Milica Markovic, Svetlana Epstein, Noa Cohen, Ellen M Zimmermann, Aaron Aponick, Shimon Ben-Shabat
The enzyme phospholipase A2 (PLA2) is overexpressed in the inflamed intestine in inflammatory bowel disease (IBD) patients, and in this work we aimed to exploit PLA2 as a prodrug-activating enzyme for a novel PL-drug conjugate, thereby liberating the free drug specifically in the targeted diseased tissue(s). The proposed prodrug contains a drug moiety covalently bound through a linker to the sn-2 position of a phospholipid (PL). The NSAID diclofenac was used as model molecule, and four different linker lengths (2, 4, 6 and 8 -CH2 units) were studied...
June 13, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28626613/modelling-environmental-drivers-of-black-band-disease-outbreaks-in-populations-of-foliose-corals-in-the-genus-montipora
#11
Carla C M Chen, David G Bourne, Christopher C Drovandi, Kerrie Mengersen, Bette L Willis, M Julian Caley, Yui Sato
Seawater temperature anomalies associated with warming climate have been linked to increases in coral disease outbreaks that have contributed to coral reef declines globally. However, little is known about how seasonal scale variations in environmental factors influence disease dynamics at the level of individual coral colonies. In this study, we applied a multi-state Markov model (MSM) to investigate the dynamics of black band disease (BBD) developing from apparently healthy corals and/or a precursor-stage, termed 'cyanobacterial patches' (CP), in relation to seasonal variation in light and seawater temperature at two reef sites around Pelorus Island in the central sector of the Great Barrier Reef...
2017: PeerJ
https://www.readbyqxmd.com/read/28626068/colorectal-cancer-screening-how-health-gains-and-cost-effectiveness-vary-by-ethnic-group-the-impact-on-health-inequalities-and-the-optimal-age-range-to-screen
#12
Melissa McLeod, Giorgi Kvizhinadze, Matt Boyd, Jan Barendregt, Diana Sarfati, Nick Wilson, Tony Blakely
Background Screening programmes consistently underserve indigenous populations despite a higher overall burden of cancer. In this study we explore the likely health gains and cost-effectiveness of a national colorectal cancer (CRC) screening programme for the indigenous Māori population of New Zealand (NZ). Methods A Markov model estimated: health benefits (QALYs), costs and cost-effectiveness of biennial immunochemical faecal occult blood testing (FOBTi) of 50-74 year olds, from 2011. Input parameters came from: literature reviews, the NZ Bowel Screening Programme Pilot, and NZ linked health datasets...
June 16, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28625764/genome-wide-identification-and-expression-profiling-of-eil-gene-family-in-woody-plant-representative-poplar-populus-trichocarpa
#13
Ertugrul Filiz, Recep Vatansever, Ibrahim Ilker Ozyigit, Mehmet Emin Uras, Ugur Sen, Naser A Anjum, Eduarda Pereira
This study aimed to improve current understanding on ethylene-insensitive 3-like (EIL) members, least explored in woody plants such as poplar (Populus trichocarpa Torr. & Gray). Herein, seven putative EIL members were identified in P. trichocarpa genome and were roughly annotated either as EIN3-like sequence associated with ethylene pathway or EIL3-like sequences related with sulfur (S)-pathway. Motif-distribution pattern of proteins also corroborated this annotation. They were distributed on six chromosomes (chr1, 3, 4 and 8-10), and were revealed to encode a protein of 509-662 residues with nuclear localization...
June 15, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28623348/a-unified-framework-for-complex-networks-with-degree-trichotomy-based-on-markov-chains
#14
David Shui Wing Hui, Yi-Chao Chen, Gong Zhang, Weijie Wu, Guanrong Chen, John C S Lui, Yingtao Li
This paper establishes a Markov chain model as a unified framework for describing the evolution processes in complex networks. The unique feature of the proposed model is its capability in addressing the formation mechanism that can reflect the "trichotomy" observed in degree distributions, based on which closed-form solutions can be derived. Important special cases of the proposed unified framework are those classical models, including Poisson, Exponential, Power-law distributed networks. Both simulation and experimental results demonstrate a good match of the proposed model with real datasets, showing its superiority over the classical models...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28621751/geographic-variations-in-cardiometabolic-risk-factors-in-luxembourg
#15
Ala'a Alkerwi, Illiasse El Bahi, Saverio Stranges, Jean Beissel, Charles Delagardelle, Stephanie Noppe, Ngianga-Bakwin Kandala
Cardiovascular disease (CVD) and associated behavioural and metabolic risk factors constitute a major public health concern at a global level. Many reports worldwide have documented different risk profiles for populations with demographic variations. The objective of this study was to examine geographic variations in the top leading cardio metabolic and behavioural risk factors in Luxembourg, in order to provide an overall picture of CVD burden across the country. The analysis conducted was based on data from the nationwide ORISCAV-LUX survey, including 1432 subjects, aged 18-69 years...
June 16, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28620143/meta-analysis-of-differences-in-constant-murley-scores-for-three-mid-shaft-clavicular-fracture-treatments
#16
Wei Jiang, Hua Wang, Yu-Sheng Li, Tian-Jian Zhou, Xin-Jia Hu
There is no consensus on the optimal treatment for mid-shaft clavicular fracture. We conducted a meta-analysis to compare the effectiveness of non-operative treatment, plate fixation, and intramedullary pin fixation in terms of the Constant-Murley Score (CMS) for treatment of mid-shaft clavicular fracture. Comprehensive search of the Embase, Cochrane Library and PubMed was conducted to retrieve relevant randomized controlled trials (RCTs). A random-effect network meta-analysis was conducted within a Bayesian framework using Markov Chain Monte Carlo (MCMC) in OpenBUGS 3...
June 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28618578/nearly-maximally-predictive-features-and-their-dimensions
#17
Sarah E Marzen, James P Crutchfield
Scientific explanation often requires inferring maximally predictive features from a given data set. Unfortunately, the collection of minimal maximally predictive features for most stochastic processes is uncountably infinite. In such cases, one compromises and instead seeks nearly maximally predictive features. Here, we derive upper bounds on the rates at which the number and the coding cost of nearly maximally predictive features scale with desired predictive power. The rates are determined by the fractal dimensions of a process' mixed-state distribution...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28618338/markolab-a-simulator-to-study-ionic-channel-s-stochastic-behavior
#18
Robson Rodrigues da Silva, Daniel Gustavo Goroso, Donald M Bers, José Luis Puglisi
Mathematical models of the cardiac cell have started to include markovian representations of the ionic channels instead of the traditional Hodgkin & Huxley formulations. There are many reasons for this: Markov models are not restricted to the idea of independent gates defining the channel, they allow more complex description with specific transitions between open, closed or inactivated states, and more importantly those states can be closely related to the underlying channel structure and conformational changes...
June 12, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28617313/trackcc-a-practical-wireless-indoor-localization-system-based-on-less-expensive-chips
#19
Xiaolong Li, Yan Zheng, Jun Cai, Yunfei Yi
This paper aims at proposing a new wireless indoor localization system (ILS), called TrackCC, based on a commercial type of low-power system-on-chip (SoC), nRF24LE1. This type of chip has only l output power levels and acute fluctuation for a received minimum power level in operation, which give rise to many practical challenges for designing localization algorithms. In order to address these challenges, we exploit the Markov theory to construct a ( l + 1 ) × ( l + 1 ) -sized state transition matrix to remove the fluctuation, and then propose a priority-based pattern matching algorithm to search for the most similar match in the signal map to estimate the real position of unknown nodes...
June 15, 2017: Sensors
https://www.readbyqxmd.com/read/28616436/initiatives-to-reduce-nonprescription-sales-and-dispensing-of-antibiotics-findings-and-implications
#20
Vanda Marković-Peković, Nataša Grubiša, Johanita Burger, Ljubica Bojanić, Brian Godman
OBJECTIVE: Irrational use of antimicrobials is a major driver of antimicrobial resistance, exacerbated by dispensing antibiotics without a prescription. Our previous study suggested this was a problem in the Republic of Srpska despite legislation. Since then, a number of activities have been initiated. Consequently, the study aimed to ascertain whether these multiple initiatives had reduced this. METHODS: Patients visiting all community pharmacies in the Republic from October 2014 to July 2015 presenting with symptoms typical of an acute, viral, and mostly uncomplicated upper respiratory tract infection, with results compared to the previous study...
April 2017: Journal of Research in Pharmacy Practice
keyword
keyword
10335
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"