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https://www.readbyqxmd.com/read/29775648/towards-a-quantitative-model-to-predict-the-toxicity-pathogenicity-potential-of-mineral-fibers
#1
Alessandro F Gualtieri
A number of mineral fibers represent a health hazard because they are classified as cancer-causing chemical/physical toxicants upon (chronic) dust inhalation. Although in the last decades they have been the subject of intensive multidisciplinary investigations, the mechanisms by which mineral fibers induce toxic and pathogenic adverse effects on human health and environment are not yet fully understood. The major intricacy of the biological approach that prevents the design of a conclusive shared model of behavior of mineral fibers in a biological system stems from their very nature with intrinsic variability in chemical, molecular, structural and morphometric parameters, biodurability and surface reactivity...
May 15, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29774571/clustering-and-variable-selection-in-the-presence-of-mixed-variable-types-and-missing-data
#2
C B Storlie, S M Myers, S K Katusic, A L Weaver, R G Voigt, P E Croarkin, R E Stoeckel, J D Port
We consider the problem of model-based clustering in the presence of many correlated, mixed continuous, and discrete variables, some of which may have missing values. Discrete variables are treated with a latent continuous variable approach, and the Dirichlet process is used to construct a mixture model with an unknown number of components. Variable selection is also performed to identify the variables that are most influential for determining cluster membership. The work is motivated by the need to cluster patients thought to potentially have autism spectrum disorder on the basis of many cognitive and/or behavioral test scores...
May 17, 2018: Statistics in Medicine
https://www.readbyqxmd.com/read/29774298/cystic-echinococcosis-in-marketed-offal-of-sheep-in-basrah-iraq-abattoir-based-survey-and-a-probabilistic-model-estimation-of-the-direct-economic-losses-due-to-hydatid-cyst
#3
Mohanad F Abdulhameed, Ihab Habib, Suzan A Al-Azizz, Ian Robertson
Cystic echinococcosis (CE) is a highly endemic parasitic zoonosis in Iraq with substantial impacts on livestock productivity and human health. The objectives of this study were to study the abattoir-based occurrence of CE in marketed offal of sheep in Basrah province, Iraq, and to estimate, using a probabilistic modelling approach, the direct economic losses due to hydatid cysts. Based on detailed visual meat inspection, results from an active abattoir survey in this study revealed detection of hydatid cysts in 7...
February 2018: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29772688/modeling-the-population-health-impact-of-introducing-a-modified-risk-tobacco-product-into-the-u-s-market
#4
Smilja Djurdjevic, Peter N Lee, Rolf Weitkunat, Zheng Sponsiello-Wang, Frank Lüdicke, Gizelle Baker
Philip Morris International (PMI) has developed the Population Health Impact Model (PHIM) to quantify, in the absence of epidemiological data, the effects of marketing a candidate modified risk tobacco product (cMRTP) on the public health of a whole population. Various simulations were performed to understand the harm reduction impact on the U.S. population over a 20-year period under various scenarios. The overall reduction in smoking attributable deaths (SAD) over the 20-year period was estimated as 934,947 if smoking completely went away and between 516,944 and 780,433 if cMRTP use completely replaces smoking...
May 16, 2018: Healthcare (Basel, Switzerland)
https://www.readbyqxmd.com/read/29772472/postintroduction-study-of-cost-effectiveness-of-pneumococcal-vaccine-pcv10-from-public-sector-payer-s-perspective-in-the-state-of-santa-catarina-brazil
#5
Emil Kupek, Ilse Viertel
OBJECTIVES: To evaluate cost effectiveness of 10-valent pneumococcal conjugate vaccine in the routine immunization program for children younger than 5 years in Brazil by a postintroduction study. METHODS: Ecological study of prevaccine (2006-2009) versus postvaccine (2011-2014) period related the changes in mortality rate and hospitalization rate to direct cost of pneumonia treatment from the payer's perspective to estimate the cost effectiveness regarding lives saved, life-years gained, and disability-adjusted life-year for children younger than 5 years in the southern Brazilian state of Santa Catarina...
May 14, 2018: Value in Health Regional Issues
https://www.readbyqxmd.com/read/29771814/using-technology-to-enhance-teaching-of-patient-centered-interviewing-for-early-medical-students
#6
Stacey Kaltman, Nicholas Talisman, Susan Pennestri, Eleri Syverson, Paige Arthur, Yianna Vovides
INTRODUCTION: Effective strategies for teaching communication skills to health professions students are needed. This article describes the design and evaluation of immersive and interactive video simulations for medical students to practice basic communication skills. METHODS: Three simulations were developed, focusing on patient-centered interviewing techniques such as using open-ended questions, reflections, and empathic responses while assessing a patient's history of present illness...
May 15, 2018: Simulation in Healthcare: Journal of the Society for Simulation in Healthcare
https://www.readbyqxmd.com/read/29771693/use-of-patient-simulators-to-characterize-the-repeatability-and-reproducibility-of-automated-oscillometric-blood-pressure-monitors
#7
Elmiloudi M Sarhrani, Thomas B Gilmore, Andre S Lamontagne, Lauren B Harris, Jay S Kellett, Michael P Sweeney, Teresa I Navas, Oleg Vesnovsky, Charles Ho, Luke H Herbertson
OBJECTIVES: Automated oscillometric blood pressure (BP) monitors can be critical health assessment tools if they are accurate and can provide repeatable and reproducible readings. Commercial patient simulators are capable of screening for poorly performing oscillometric BP monitors. A valid screening bench test method to identify unreliable and underperforming BP monitors could advance surveillance of these devices and support regulatory decision making. METHODS: Two simulators were used to characterize a total of 19 legally marketed upper arm, wrist, hospital-grade, and public-use BP monitors...
May 16, 2018: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/29771338/cost-effectiveness-analysis-of-an-adherence-promotion-intervention-for-children-with-leukemia-a-markov-model-based-simulation
#8
Meghan E McGrady, Mark H Eckman, Maureen M O'Brien, Ahna L H Pai
Objective: Improving medication adherence among children with B-cell precursor acute lymphoblastic leukemia (B-ALL) has the potential to reduce relapse rates but requires an investment in resources. An economic evaluation is needed to understand the potential costs and benefits of delivering adherence-promotion interventions (APIs) as part of standard clinical care. Methods: A Markov decision analytic model was used to simulate the potential incremental cost-effectiveness per quality-adjusted life year (QALY) to be gained from an API for children with B-ALL in first continuous remission compared with treatment as usual (TAU, no intervention)...
May 15, 2018: Journal of Pediatric Psychology
https://www.readbyqxmd.com/read/29770484/inter-method-reproducibility-of-biexponential-r-2-mr-relaxometry-for-estimation-of-liver-iron-concentration
#9
Ali Pirasteh, Qing Yuan, Diego Hernando, Scott B Reeder, Ivan Pedrosa, Takeshi Yokoo
PURPOSE: To assess the reproducibility of biexponential R2 -relaxometry MRI for estimation of liver iron concentration (LIC) between proprietary and nonproprietary analysis methods. METHODS: This single-center retrospective study, approved by investigational review board and compliant with the Health Insurance Portability and Accountability Act, included 40 liver MRI exams in 38 subjects with suspected or known iron overload. From spin-echo images of the liver, acquired at 5 different echo times (TE = 6-18 ms), biexponential R2 maps were calculated using 1 proprietary (FerriScan, Resonance Health Ltd...
May 16, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29770445/cost-effectiveness-of-a-community-based-diabetes-prevention-program-with-participation-incentives-for-medicaid-beneficiaries
#10
Todd Gilmer, Patrick J O'Connor, Jeffrey S Schiff, Gretchen Taylor, Gabriela Vazquez-Benitez, Joyce E Garrett, Houa Vue-Her, Sarah Rinn, Julie Anderson, Jay Desai
OBJECTIVE: To examine the cost-effectiveness of a community-based Diabetes Prevention Program (DPP) for Medicaid beneficiaries from the perspective of the health care sector. DATA SOURCES/STUDY SETTING: A total of 847 Medicaid enrollees at high risk for type 2 diabetes participating in a community-based DPP. STUDY DESIGN: Pre- and post clinical outcome and cost data were used as inputs into a validated diabetes simulation model. The model was used to evaluate quality-adjusted life years (QALYs) and health care costs over a 40-year time horizon from the perspective of the health care sector...
May 16, 2018: Health Services Research
https://www.readbyqxmd.com/read/29770443/the-impact-of-policy-incentives-on-long-term-care-insurance-and-medicaid-costs-does-underwriting-matter
#11
Portia Y Cornell, David C Grabwoski
OBJECTIVE: To test whether underwriting modifies the effect of state-based incentives on individuals' purchase of long-term care insurance. DATA SOURCE: Health and Retirement Study (HRS), 1996-2012. STUDY DESIGN: We estimated difference-in-difference regression models with an interaction of state policy indicators with individuals' probabilities of being approved for long-term care insurance. DATA EXTRACTION: We imputed probabilities of underwriting approval for respondents in the HRS using a model developed with underwriting decisions from two U...
May 16, 2018: Health Services Research
https://www.readbyqxmd.com/read/29768667/analyzing-self-controlled-case-series-data-when-case-confirmation-rates-are-estimated-from-an-internal-validation-sample
#12
Stanley Xu, Christina L Clarke, Sophia R Newcomer, Matthew F Daley, Jason M Glanz
Vaccine safety studies are often electronic health record (EHR)-based observational studies. These studies often face significant methodological challenges, including confounding and misclassification of adverse event. Vaccine safety researchers use self-controlled case series (SCCS) study design to handle confounding effect and employ medical chart review to ascertain cases that are identified using EHR data. However, for common adverse events, limited resources often make it impossible to adjudicate all adverse events observed in electronic data...
May 16, 2018: Biometrical Journal. Biometrische Zeitschrift
https://www.readbyqxmd.com/read/29768416/poverty-dynamics-poverty-thresholds-and-mortality-an-age-stage-markovian-model
#13
Shayna Fae Bernstein, David Rehkopf, Shripad Tuljapurkar, Carol C Horvitz
Recent studies have examined the risk of poverty throughout the life course, but few have considered how transitioning in and out of poverty shape the dynamic heterogeneity and mortality disparities of a cohort at each age. Here we use state-by-age modeling to capture individual heterogeneity in crossing one of three different poverty thresholds (defined as 1×, 2× or 3× the "official" poverty threshold) at each age. We examine age-specific state structure, the remaining life expectancy, its variance, and cohort simulations for those above and below each threshold...
2018: PloS One
https://www.readbyqxmd.com/read/29768223/nano-biosensor-based-on-reduced-graphene-oxide-and-gold-nanoparticles-for-detection-of-phenylketonuria-associated-dna-mutation
#14
Seyed Morteza Seifati, Navid Nasirizadeh, Mostafa Azimzadeh
Phenylketonuria (PKU)-associated DNA mutation in newborn children can be harmful to his health and early detection is the best way to inhibit consequences. A novel electrochemical nano-biosensor was developed for PKU detection, based on signal amplification using nanomaterials, e.g. gold nanoparticles (AuNPs) decorated on the reduced graphene oxide sheet on the screen-printed carbon electrode. The fabrication steps were checked by field emission scanning electron microscope imaging as well as cyclic voltammetry analysis...
June 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/29765775/potential-impact-of-introducing-the-pneumococcal-conjugate-vaccine-into-national-immunisation-programmes-an-economic-epidemiological-analysis-using-data-from-india
#15
Itamar Megiddo, Eili Klein, Ramanan Laxminarayan
Pneumococcal pneumonia causes an estimated 105 000 child deaths in India annually. The planned introduction of the serotype-based pneumococcal conjugate vaccine (PCV) is expected to avert child deaths, but the high cost of PCV relative to current vaccines provided under the Universal Immunization Programme has been a concern. Cost-effectiveness studies from high-income countries are not readily comparable because of differences in the distribution of prevalent serotypes, population and health systems. We extended IndiaSim, our agent-based simulation model representative of the Indian population and health system, to model the dynamics of Streptococcus pneumoniae ...
2018: BMJ Global Health
https://www.readbyqxmd.com/read/29764241/lack-of-respiratory-and-ocular-effects-following-acute-propylene-glycol-exposure-in-healthy-humans
#16
Pamela Dalton, Brianna Soreth, Christopher Maute, Carolyn Novaleski, Marcy Banton
OBJECTIVE: Propylene glycol (PG) is a widely used solvent, chemical intermediate and carrier substance for foods, pharmaceutical and cosmetic products. Professional and occupational exposure to PG aerosol and vapor may occur from theatrical smoke generators and during application of deicing products to airplanes. While PG is considered to have low toxicity, the results of one study suggested that brief (1-min) exposure to PG mist elicited ocular and respiratory effects in humans. Because the high concentrations and brief exposure duration in that study were not representative of most occupational exposures, a controlled experimental exposure study was conducted to clarify or confirm the earlier findings...
May 15, 2018: Inhalation Toxicology
https://www.readbyqxmd.com/read/29763937/bacteriophage-cocktail-for-biocontrol-of-escherichia-coli-o157-h7-stability-and-potential-allergenicity-study
#17
Karina Ramirez, Carmina Cazarez-Montoya, Hector Samuel Lopez-Moreno, Nohelia Castro-Del Campo
Escherichia coli O157:H7 has become a global public health and a food safety problem. Despite the implementation of control strategies that guarantee the safety in various products, outbreaks persist and new alternatives are necessary to reduce this pathogen along the food chain. Recently, our group isolated and characterised lytic bacteriophages against E. coli O157:H7 with potential to be used as biocontrol agents in food. To this end, phages need certain requirements to allow their manufacture and application...
2018: PloS One
https://www.readbyqxmd.com/read/29763311/thyroid-disruption-by-bisphenol-s-analogues-via-thyroid-hormone-receptor-%C3%AE-in-vitro-in-vivo-and-molecular-dynamics-simulation-study
#18
Liping Lu, Tingjie Zhan, Mei Ma, Chao Xu, Jingpeng Wang, Chunlong Zhang, Weiping Liu, Shulin Zhuang
Bisphenol S (4-hydroxyphenyl sulfone, BPS) is increasingly used as BPA alternatives. The global usage of BPS and its analogues (BPSs) caused the frequent detection of their residues in multiple environmental media. We investigated their potential endocrine disrupting effects toward thyroid hormone receptor (TR) β. The molecular interaction of BPSs toward TRβ ligand binding domain (LBD) was probed by fluorescence spectroscopy and molecular dynamics (MD) simulations. BPSs caused the static fluorescence quenching of TRβ LBD...
May 15, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29762798/a-prenatal-standardized-patient-experience-for-medical-students-on-their-family-medicine-clerkship
#19
Sarah E Stumbar, Suzanne Minor, Marquita Samuels
BACKGROUND AND OBJECTIVES: Students on their family medicine clerkship at Herbert Wertheim College of Medicine get little clinical exposure to obstetric care, which is not commonly provided by family physicians in urban settings. To address this, we added to our clerkship didactic curriculum a 2-hour session involving a standardized patient (SP). The SP is collectively interviewed by the student group during four simulated prenatal visits, each of which present a different complication of pregnancy...
May 2018: Family Medicine
https://www.readbyqxmd.com/read/29762657/prospects-for-tuberculosis-elimination-in-the-united-states-results-of-a-transmission-dynamic-model
#20
Nicolas A Menzies, Ted Cohen, Andrew N Hill, Reza Yaesoubi, Kara Galer, Emory Wolf, Suzanne M Marks, Joshua A Salomon
We estimated long-term tuberculosis (TB) trends in the US population and assessed prospects for TB elimination. We used a detailed simulation model allowing for changes in TB transmission, immigration, and other TB risk determinants. We evaluated 5 hypothetical scenarios from 2017 to 2100: 1) maintain current TB prevention and treatment activities (base-case), 2) provision of latent TB infection testing and treatment for new legal immigrants, 3) increased uptake of latent TB infection screening and treatment among high-risk populations, including a 3-month isoniazid-rifapentine regimen, 4) improved TB case detection, 5) improved TB treatment quality...
May 14, 2018: American Journal of Epidemiology
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