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https://www.readbyqxmd.com/read/28527626/the-impact-of-economic-conditions-on-the-disablement-process-a-markov-transition-approach-using-share-data
#1
Y Arrighi, T Rapp, N Sirven
A growing number of studies underline the relationship between socioeconomic status and health at older ages. Following that literature, we explore the impact of economic conditions on changes in functional health overtime. Frailty, a state of physiological instability, has been identified in the public health literature as a candidate for disability prevention but received little attention from health economists. Using SHARE panel data, respondents aged 50 and over from ten European countries were categorised as robust, frail and dependent...
May 10, 2017: Health Policy
https://www.readbyqxmd.com/read/28527568/evolution-of-nuclear-receptors-and-ligand-signaling-toward-a-soft-key-lock-model
#2
Guillaume Holzer, Gabriel V Markov, Vincent Laudet
Nuclear receptors (NRs) are a family of ligand-regulated transcription factors that modulate a wide variety of physiological functions in a ligand-dependent manner. The first NRs were discovered as receptors of well-known hormones such as 17β-estradiol, corticosteroids, or thyroid hormones. In these cases a direct activation of the receptor transcriptional activity by a very specific ligand, with nanomolar affinity, was demonstrated, providing a strong conceptual framework to understand the mechanism of action of these hormones...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28527448/estimating-thermodynamic-expectations-and-free-energies-in-expanded-ensemble-simulations-systematic-variance-reduction-through-conditioning
#3
Manuel Athènes, Pierre Terrier
Markov chain Monte Carlo methods are primarily used for sampling from a given probability distribution and estimating multi-dimensional integrals based on the information contained in the generated samples. Whenever it is possible, more accurate estimates are obtained by combining Monte Carlo integration and integration by numerical quadrature along particular coordinates. We show that this variance reduction technique, referred to as conditioning in probability theory, can be advantageously implemented in expanded ensemble simulations...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28524088/a-hybrid-generalized-hidden-markov-model-based-condition-monitoring-approach-for-rolling-bearings
#4
Jie Liu, Youmin Hu, Bo Wu, Yan Wang, Fengyun Xie
The operating condition of rolling bearings affects productivity and quality in the rotating machine process. Developing an effective rolling bearing condition monitoring approach is critical to accurately identify the operating condition. In this paper, a hybrid generalized hidden Markov model-based condition monitoring approach for rolling bearings is proposed, where interval valued features are used to efficiently recognize and classify machine states in the machine process. In the proposed method, vibration signals are decomposed into multiple modes with variational mode decomposition (VMD)...
May 18, 2017: Sensors
https://www.readbyqxmd.com/read/28523420/cost-utility-analysis-of-certolizumab-pegol-in-combination-with-methotrexate-in-patients-with-moderate-to-severe-active-rheumatoid-arthritis-in-greece
#5
C Tzanetakos, A Tzioufas, A Goules, G Kourlaba, T Theodoratou, P Christou, N Maniadakis
We aimed to evaluate the cost-effectiveness of certolizumab pegol (CZP), a pegylated fc-free anti-TNF, as add-on therapy to methotrexate (MTX) versus etanercept, adalimumab, or golimumab in patients with moderate-to-severe active rheumatoid arthritis (RA) not responding to the conventional synthetic disease-modifying anti-rheumatic drugs (csDMARDs). A Markov model (6-month cycle length) assessed health and cost outcomes of CZP versus other anti-TNFs recommended for RA in Greece over a patient's lifetime. Following discontinuation of first-line anti-TNF, patients switched to second anti-TNF and then to a biologic with another mode of action...
May 18, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28522725/draft-genome-sequences-of-five-enterococcus-species-isolated-from-the-gut-of-patients-with-suspected-clostridium-difficile-infection
#6
Eduardo Castro-Nallar, Sandro L Valenzuela, Sebastián Baquedano, Carolina Sánchez, Fabiola Fernández, Annette N Trombert
We present draft genome sequences of five Enterococcus species from patients suspected of Clostridium difficile infection. Genome completeness was confirmed by presence of bacterial orthologs (97%). Gene searches using Hidden-Markov models revealed that the isolates harbor between seven and 11 genes involved in antibiotic resistance to tetracyclines, beta-lactams, and vancomycin.
May 18, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28522655/choice-of-hemodialysis-access-in-older-adults-a-cost-effectiveness-analysis
#7
Rasheeda K Hall, Evan R Myers, Sylvia E Rosas, Ann M O'Hare, Cathleen S Colón-Emeric
BACKGROUND AND OBJECTIVES: Although arteriovenous fistulas have been found to be the most cost-effective form of hemodialysis access, the relative benefits of placing an arteriovenous fistula versus an arteriovenous graft seem to be least certain for older adults and when placed preemptively. However, older adults' life expectancy is heterogeneous, and most patients do not undergo permanent access creation until after dialysis initiation. We evaluated cost-effectiveness of arteriovenous fistula placement after dialysis initiation in older adults as a function of age and life expectancy...
May 18, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28522646/mr-spectroscopy-of-hepatic-fat-and-adiponectin-and-leptin-levels-during-testosterone-therapy-in-type-2-diabetes-a-randomized-double-blinded-placebo-controlled-trial
#8
Line Velling Magnussen, Poul Erik Andersen, Anabel Diaz, Jelena Markovic Ostojic, Kurt Højlund, David M Hougaard, Anders Nymark Christensen, Torben Leo Nielsen, Marianne Skovsager Andersen
BACKGROUND: Men with type 2 diabetes mellitus (T2D) often have lowered testosterone levels and an increased risk of cardiovascular disease (CVD). Ectopic fat increases the risk of CVD, whereas subcutaneous gluteofemoral fat protects against CVD and has a beneficial adipokine secreting profile. HYPOTHESIS: Testosterone replacement therapy (TRT) may reduce the content of ectopic fat and improve the adipokine profile in men with T2D. DESIGN AND METHODS: A randomized, double-blinded, placebo-controlled study in 39 men aged 50-70 years with T2D and bioavailable testosterone levels <7...
May 18, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28522603/smad4-loss-is-associated-with-cetuximab-resistance-and-induction-of-mapk-jnk-activation-in-head-and-neck-cancer-cells
#9
Hiroyuki Ozawa, Ruchira Ranaweera, Evgeny Izumchenko, Eugene Makarev, Alex Zhavoronkov, Elana J Fertig, Jason D Howard, Ana Markovic, Atul Bedi, Rajani Ravi, Jimena Perez, Quynh-Thu Le, Christina S Kong, Richard C K Jordan, Hao Wang, Hyunseok Kang, Harry Quon, David Sidransky, Christine H Chung
Purpose: We previously demonstrated an association between decreased SMAD4 expression and cetuximab resistance in head and neck squamous cell carcinoma (HNSCC). The purpose of this study was to further elucidate the clinical relevance of SMAD4 loss in HNSCC. Experimental Design: SMAD4 expression was assessed by immunohistochemistry in 130 newly diagnosed and 43 recurrent HNSCC patients. Correlative statistical analysis with clinicopathological data was also performed. OncoFinder, a bioinformatics tool, was used to analyze molecular signaling in TCGA tumors with low or high SMAD4 mRNA levels...
May 18, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28521828/markov-modeling-in-hepatitis-b-screening-and-linkage-to-care
#10
Martin A Sehr, Kartik D Joshi, John M Fontanesi, Robert J Wong, Robert R Bitmead, Robert G Gish
BACKGROUND: With up to 240 million people chronically infected with hepatitis B worldwide, including an estimated 2 million in the United States, widespread screening is needed to link the infected to care and decrease the possible consequences of untreated infection, including liver cancer, cirrhosis and death. Screening is currently fraught with challenges in both the developed and developing world. New point-of-care tests may have advantages over standard-of-care tests in terms of cost-effectiveness and linkage to care...
May 18, 2017: Theoretical Biology & Medical Modelling
https://www.readbyqxmd.com/read/28521540/cost-effectiveness-analysis-of-rivaroxaban-for-treatment-and-secondary-prevention-of-venous-thromboembolism-in-the-netherlands
#11
Marieke Heisen, Maarten J Treur, Harald E Heemstra, Eric B W Giesen, Maarten J Postma
BACKGROUND: Until recently, standard treatment of venous thromboembolism (VTE) concerned a combination of short-term low-molecular-weight heparin (LMWH) and long-term vitamin-K antagonist (VKA). Risk of bleeding and the requirement for regular anticoagulation monitoring are, however, limiting their use. Rivaroxaban is a novel oral anticoagulant associated with a significantly lower risk of major bleeds (hazard ratio 0.54, 95% confidence interval 0.37-0.79) compared to LMWH/VKA therapy and does not require regular anticoagulation monitoring...
May 18, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/28520782/adaptive-double-threshold-energy-detection-based-on-markov-model-for-cognitive-radio
#12
Yulei Liu, Jun Liang, Nan Xiao, Xiaogang Yuan, Zhenhao Zhang, Meng Hu, Yulong Hu
The rapid development in the area of cognitive radio technology leads the society to higher standards of spectrum sensing performance, particularly in low signal-to-noise ratio (SNR) environment. This article proposes an adaptive double-threshold energy sensing method based on Markov model (ADEMM). When using the double-threshold energy sensing method, the modified Markov model that accounts for the time varying characteristic of the channel occupancy was presented to resolve the 'confused' channel state. Furthermore, in order to overcome the effect of noise uncertainty, the findings of this article introduce an adaptive double-threshold spectrum sensing method that adjusts its thresholds according to the achievable maximal detection probability...
2017: PloS One
https://www.readbyqxmd.com/read/28520716/expected-population-weight-and-diabetes-impact-of-the-1-peso-per-litre-tax-to-sugar-sweetened-beverages-in-mexico
#13
Tonatiuh Barrientos-Gutierrez, Rodrigo Zepeda-Tello, Eliane R Rodrigues, Arantxa Colchero-Aragonés, Rosalba Rojas-Martínez, Eduardo Lazcano-Ponce, Mauricio Hernández-Ávila, Juan Rivera-Dommarco, Rafael Meza
STUDY QUESTION: What effect on body mass index, obesity and diabetes can we expect from the 1-peso-per-litre tax to sugar sweetened beverages in Mexico? METHODS: Using recently published estimates of the reductions in beverage purchases due to the tax, we modelled its expected long-term impacts on body mass index (BMI), obesity and diabetes. Microsimulations based on a nationally representative dataset were used to estimate the impact of the tax on BMI and obesity...
2017: PloS One
https://www.readbyqxmd.com/read/28520199/economic-evaluation-of-strategies-for-restarting-anticoagulation-therapy-after-a-first-event-of-unprovoked-venous-thromboembolism
#14
M Monahan, J Ensor, D Moore, D Fitzmaurice, S Jowett
BACKGROUND: Following at least three months of anticoagulation therapy after a first unprovoked Venous Thromboembolism (VTE), there is uncertainty about the duration of therapy. Further anticoagulation therapy reduces the risk of having a potentially fatal recurrent VTE but at the expense of a higher risk of bleeding which can also be fatal. OBJECTIVE: An economic evaluation sought to estimate the long-term cost-effectiveness of using a decision rule for restarting anticoagulation therapy versus no extension of therapy in patients based on their risk of a further unprovoked VTE...
May 18, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28515812/cost-effectiveness-of-mirabegron-compared-to-tolterodine-er-4-mg-for-overactive-bladder-in-canada
#15
Sender Herschorn, Jameel Nazir, Barbara Ramos, Zalmai Hakimi
INTRODUCTION: This analysis compared the cost-effectiveness of once-daily regimens of mirabegron 50 mg and generic tolterodine ER 4 mg in a hypothetical cohort of previously treated patients with overactive bladder (OAB) in Canada. METHODS: A Markov model was developed to represent different health states according to OAB symptoms (frequency, incontinence), presence/absence of adverse events (AEs; dry mouth, constipation, blurred vision), and treatment status (on-treatment, discontinue treatment, restart previous treatment)...
March 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28515767/cost-effectiveness-evaluation-of-aspirin-in-primary-prevention-of-myocardial-infarction-amongst-males-with-average-cardiovascular-risk-in-iran
#16
Mohammadreza Amirsadri, Mohammad Javad Sedighi
Aspirin is one of the certified medicines commonly used for the secondary prevention of myocardial infarction (MI). Aspirin side effects and gastrointestinal bleeding, in particular, have arisen debates on its use for the primary prevention of MI. The present research evaluates the cost-effectiveness of the use of aspirin in the primary prevention of MI among Iranian men with average cardiovascular disease (CVD) risk, using Markov modeling technique. The incremental cost-effectiveness ratios (ICERs) estimated to be 864 USA dollars (USD) per quality-adjusted life years (QALY) gained and 782 USD per life years gained (LYG) for each patient in the base-case scenario (public tariffs and no discounting)...
April 2017: Research in Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28515183/modeling-lifetime-costs-and-health-outcomes-attributable-to-secondhand-smoke-exposure-at-home-among-korean-adult-women
#17
Jiyae Lee, Ah Ram Han, Dalwoong Choi, Kyung-Min Lim, SeungJin Bae
PURPOSE: The aim of this research is to estimate lifetime costs and health consequences for Korean adult women who were exposed to secondhand smoke (SHS) at home. METHODS: A Markov model was developed to project the lifetime healthcare costs and health outcomes of a hypothetical cohort of Korean women who are 40 years old and were married to current smokers. The Korean epidemiological data were used to reflect the natural history of SHS-exposed and non-exposed women...
May 17, 2017: BMJ Open
https://www.readbyqxmd.com/read/28514442/architecture-of-the-human-interactome-defines-protein-communities-and-disease-networks
#18
Edward L Huttlin, Raphael J Bruckner, Joao A Paulo, Joe R Cannon, Lily Ting, Kurt Baltier, Greg Colby, Fana Gebreab, Melanie P Gygi, Hannah Parzen, John Szpyt, Stanley Tam, Gabriela Zarraga, Laura Pontano-Vaites, Sharan Swarup, Anne E White, Devin K Schweppe, Ramin Rad, Brian K Erickson, Robert A Obar, K G Guruharsha, Kejie Li, Spyros Artavanis-Tsakonas, Steven P Gygi, J Wade Harper
The physiology of a cell can be viewed as the product of thousands of proteins acting in concert to shape the cellular response. Coordination is achieved in part through networks of protein-protein interactions that assemble functionally related proteins into complexes, organelles, and signal transduction pathways. Understanding the architecture of the human proteome has the potential to inform cellular, structural, and evolutionary mechanisms and is critical to elucidating how genome variation contributes to disease...
May 17, 2017: Nature
https://www.readbyqxmd.com/read/28511658/global-kalman-filter-approaches-to-estimate-absolute-angles-of-lower-limb-segments
#19
Samuel L Nogueira, Stefan Lambrecht, Roberto S Inoue, Magdo Bortole, Arlindo N Montagnoli, Juan C Moreno, Eduardo Rocon, Marco H Terra, Adriano A G Siqueira, Jose L Pons
BACKGROUND: In this paper we propose the use of global Kalman filters (KFs) to estimate absolute angles of lower limb segments. Standard approaches adopt KFs to improve the performance of inertial sensors based on individual link configurations. In consequence, for a multi-body system like a lower limb exoskeleton, the inertial measurements of one link (e.g., the shank) are not taken into account in other link angle estimations (e.g., foot). Global KF approaches, on the other hand, correlate the collective contribution of all signals from lower limb segments observed in the state-space model through the filtering process...
May 16, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28511548/quality-adjusted-life-year-difference-in-patients-with-predominant-negative-symptoms-of-schizophrenia-treated-with-cariprazine-and-risperidone
#20
Bertalan Németh, Anett Molnár, Ron Akehurst, Margit Horváth, Kristóf Kóczián, György Németh, Árpád Götze, Zoltán Vokó
AIM: Our study aimed at estimating differences in quality-adjusted life year (QALY) gain for patients with predominant negative symptoms of schizophrenia treated with cariprazine compared with risperidone. MATERIALS & METHODS: A Markov model was built, based on the Mohr-Lenert approach and data derived from clinical trials, to estimate potential QALY gains of patients. RESULTS: Patients had higher probability of reaching better health states treated with cariprazine compared with risperidone...
May 17, 2017: Journal of Comparative Effectiveness Research
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