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https://www.readbyqxmd.com/read/28743105/statistical-interactions-from-a-growth-curve-perspective
#1
Sean M Devlin, Jaya M Satagopan
Logistic regression is widely used to evaluate the association between risk factors and a binary outcome. The logistic curve is symmetric around its point of inflection. Alternative families of curves, such as the additive Gompertz or Guerrero-Johnson models, have been proposed in various scenarios due to their asymmetry: disease risk may initially increase rapidly and be followed by a longer period where the rate of growth slowly decreases. When modeling binary outcomes in relation to risk factors, an additive logistic model may not provide a good fit to the data...
July 26, 2017: Human Heredity
https://www.readbyqxmd.com/read/28742801/tracking-the-return-of-aedes-aegypti-to-brazil-the-major-vector-of-the-dengue-chikungunya-and-zika-viruses
#2
Panayiota Kotsakiozi, Andrea Gloria-Soria, Adalgisa Caccone, Benjamin Evans, Renata Schama, Ademir Jesus Martins, Jeffrey R Powell
BACKGROUND: Aedes aegypti, commonly known as "the yellow fever mosquito", is of great medical concern today primarily as the major vector of dengue, chikungunya and Zika viruses, although yellow fever remains a serious health concern in some regions. The history of Ae. aegypti in Brazil is of particular interest because the country was subjected to a well-documented eradication program during 1940s-1950s. After cessation of the campaign, the mosquito quickly re-established in the early 1970s with several dengue outbreaks reported during the last 30 years...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28742637/is-intussusception-a-middle-of-the-night-emergency
#3
Brooke S Lampl, Jonathan Glaab, Rama S Ayyala, Rania Kanchi, Carrie B Ruzal-Shapiro
OBJECTIVES: Intussusception is the most common abdominal emergency in pediatric patients aged 6 months to 3 years. There is often a delay in diagnosis, as the presentation can be confused for viral gastroenteritis. Given this scenario, we questioned the practice of performing emergency reductions in children during the night when minimal support staff are available. Pneumatic reduction is not a benign procedure, with the most significant risk being bowel perforation. We performed this analysis to determine whether it would be safe to delay reduction in these patients until normal working hours when more support staff are available...
July 24, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28742230/allopatric-speciation-despite-historical-gene-flow-divergence-and-hybridization-in-carex-furva-and-c-lucennoiberica-cyperaceae-inferred-from-plastid-and-nuclear-rad-seq-data
#4
E Maguilla, M Escudero, A L Hipp, M Luceño
Gene flow among incipient species can act as a creative or destructive force in the speciation process, generating variation on which natural selection can act while, potentially, undermining population divergence. The flowering plant genus Carex exhibits a rapid and relatively recent radiation with many species limits still unclear. This is the case with the Iberian Peninsula (Spain and Portugal) endemic C. lucennoiberica, which lay unrecognized within Carex furva until its recent description as a new species...
July 25, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28742119/doestrare-a-statistical-test-to-identify-local-enrichments-in-rare-genomic-variants-associated-with-disease
#5
Elodie Persyn, Matilde Karakachoff, Solena Le Scouarnec, Camille Le Clézio, Dominique Campion, French Exome Consortium, Jean-Jacques Schott, Richard Redon, Lise Bellanger, Christian Dina
Next-generation sequencing technologies made it possible to assay the effect of rare variants on complex diseases. As an extension of the "common disease-common variant" paradigm, rare variant studies are necessary to get a more complete insight into the genetic architecture of human traits. Association studies of these rare variations show new challenges in terms of statistical analysis. Due to their low frequency, rare variants must be tested by groups. This approach is then hindered by the fact that an unknown proportion of the variants could be neutral...
2017: PloS One
https://www.readbyqxmd.com/read/28741600/coverage-based-constraints-for-imrt-optimization
#6
Henning Mescher, Silke Ulrich, Mark Bangert
Radiation therapy treatment planning requires an incorporation of uncertainties in order to guarantee an adequate irradiation of the tumor volumes. In current clinical practice, uncertainties are accounted for implicitly with an expansion of the target volume according to generic margin recipes. Alternatively, it is possible to account for uncertainties by explicit minimization of objectives that describe worst case treatment scenarios, the expectation value of the treatment, or the coverage probability of the target volumes during treatment planning...
July 25, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28741360/influence-of-chemical-mechanical-and-transport-processes-on-wellbore-leakage-from-geologic-co2-storage-reservoirs
#7
Susan A Carroll, Jaisree Iyer, Stuart D C Walsh
Wells are considered to be high-risk pathways for fluid leakage from geologic CO2 storage reservoirs, because breaches in this engineered system have the potential to connect the reservoir to groundwater resources and the atmosphere. Given these concerns, a few studies have assessed leakage risk by evaluating regulatory records, often self-reported, documenting leakage in gas fields. Leakage is thought to be governed largely by initial well-construction quality and the method of well abandonment. The geologic carbon storage community has raised further concerns because acidic fluids in the CO2 storage reservoir, alkaline cement meant to isolate the reservoir fluids from the overlying strata, and steel casings in wells are inherently reactive systems...
July 25, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28739609/a-national-quitline-service-and-its-promotion-in-the-mass-media-modelling-the-health-gain-health-equity-and-cost-utility
#8
Nhung Nghiem, Christine L Cleghorn, William Leung, Nisha Nair, Frederieke S van der Deen, Tony Blakely, Nick Wilson
BACKGROUND: Mass media campaigns and quitlines are both important distinct components of tobacco control programmes around the world. But when used as an integrated package, the effectiveness and cost-effectiveness are not well described. We therefore aimed to estimate the health gain, health equity impacts and cost-utility of the package of a national quitline service and its promotion in the mass media. METHODS: We adapted an established Markov and multistate life-table macro-simulation model...
July 24, 2017: Tobacco Control
https://www.readbyqxmd.com/read/28739455/decision-making-in-critical-limb-ischemia-a-markov-simulation
#9
Aaron J Deutsch, C Charles Jain, Kimberly G Blumenthal, Mark W Dickinson, Anne M Neilan
BACKGROUND: Critical limb ischemia (CLI) is a feared complication of peripheral vascular disease that often requires surgical management and may require amputation of the affected limb. OBJECTIVE: To use a decision model to inform clinical management for a 63-year-old woman with CLI and multiple medical comorbidities, including advanced heart failure and diabetes. METHODS: Markov decision model evaluating four strategies: amputation, surgical bypass, endovascular therapy (e...
July 21, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28738137/public-health-and-economic-consequences-of-vaccine-hesitancy-for-measles-in-the-united-states
#10
Nathan C Lo, Peter J Hotez
Importance: Routine childhood vaccination is declining in some regions of the United States due to vaccine hesitancy, which risks the resurgence of many infectious diseases with public health and economic consequences. There are ongoing policy debates on the state and national level, including legislation around nonmedical (personal-belief) exemptions for childhood vaccination and possibly a special government commission on vaccine safety, which may affect vaccine coverage. Objective: To estimate the number of measles cases in US children and the associated economic costs under scenarios of different levels of vaccine hesitancy, using the case example of measles, mumps, and rubella (MMR) vaccination and measles...
July 24, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28737026/misconceptions-of-spanish-general-practitioners-attitudes-toward-the-management-of-urinary-tract-infections-and-asymptomatic-bacteriuria-an-internet-based-questionnaire-study
#11
C Llor, A Moragas, S Hernández, S Crispi, J M Cots
OBJECTIVE: The diagnosis and management of urinary tract infections (UTI) vary widely across countries and practices. The objective of this study was to gain insight into general practitioners' (GP) perceptions on the current management of UTIs and asymptomatic bacteriuria in Spain. METHODS: Cross-sectional, internet-based questionnaire study answered from July to September 2013. GPs affiliated with the largest Spanish scientific society in primary care (Sociedad Española de Medicina Familiar y Comunitaria) were invited to participate in the study...
July 24, 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28736976/living-donor-liver-transplantation-for-neonatal-fulminant-hepatitis-due-to-herpes-simplex-virus-infection
#12
Rodrigo Vincenzi, Eduardo A Fonseca, Karina M O Roda, Gilda Porta, Helry L Candido, Marcel R Benavides, Katia R M Leite, Rogerio C Afonso, Plinio Turine-Neto, Cristiane M F Ribeiro, Paulo Chapchap, João Seda-Neto
Although rare, ALF caused by disseminated HSV infection is associated with high mortality in the neonatal population. This condition is often diagnosed relatively late due to the absence of specific signs. We present a case involving a neonate with ALF submitted to living donor liver transplantation without a prior diagnosis. The patient had no skin or mucosal lesions, and IgM serology was negative for HSV-1 and HSV-2. Immunohistochemical staining of the liver explant was positive for herpes virus infection, and the patient subsequently received antiviral drug treatment, with a good outcome...
July 23, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28736680/spatiotemporal-identification-of-potential-tsunami-vertical-evacuation-sites-a-case-study-of-shizuoka-city-japan
#13
Gerasimos Voulgaris, Jelena Aleksejeva
INTRODUCTION: The city of Shizuoka directly faces the Nankai Trough (known for its tsunamigenic history), and is facing a potential tsunami threat. In this setting vertical evacuation can be of great significance in reducing loss of life. METHODS: We apply a GIS based method in order to identify sites that could be utilized for vertical evacuation within the existing building stock of the city, under two tsunami scenarios of 5 and 10 meters of run-up. For each building, we estimate the volume that is expected to be lost per scenario, as well as the number of people inside and how that number fluctuates over different times of the day...
April 24, 2017: PLoS Currents
https://www.readbyqxmd.com/read/28736538/agents-and-patients-in-physical-settings-linguistic-cues-affect-the-assignment-of-causality-in-german-and-tongan
#14
Andrea Bender, Sieghard Beller
Linguistic cues may be considered a potent tool for focusing attention on causes or effects. In this paper, we explore how different cues affect causal assignments in German and Tongan. From a larger screening study, two parts are reported here: Part 1 dealt with syntactic variations, including word order (agent vs. patient in first/subject position) and case marking (e.g., as ergative vs. non-ergative in Tongan) depending on verb type (transitive vs. intransitive). For two physical settings (wood floating on water and a man breaking a glass), participants assigned causality to the two entities involved...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28736047/health-risk-assessment-as-an-approach-to-manage-an-old-landfill-and-to-propose-integrated-solid-waste-treatment-a-case-study-in-italy
#15
O Paladino, M Massabò
The aim of the present paper is to show how an approach based on human health risk analysis can be used as a decisional tool for the evaluation of impacts on population and for deciding between different waste treatment processes. The situation in which the increasing production of solid wastes cannot be confined in the old existing Municipal Solid Waste landfill (settled in Genoa, Liguria Region, Italy) is used as a case study. Risk assessment for human health due to air, surface water, groundwater and soil contamination is performed in different scenarios for the old landfill and compared with alternative Waste-to-Energy management solutions that consider thermal treatment by gasification of the total waste or gasification of the dry fraction coupled with anaerobic digestion of the wet fraction, plus biogas combustion with or without sludge and bottom ash/slag disposal in the old landfill...
July 20, 2017: Waste Management
https://www.readbyqxmd.com/read/28734650/treatment-of-cracked-teeth
#16
Shaymaa Alkhalifah, Halimah Alkandari, Prem N Sharma, Alex J Moule
Although many options are proposed for the treatment of cracked posterior teeth, most treatment decisions are not evidence based. Thus, considerable individual variation can occur regarding treatment recommendations for the same scenario. To our knowledge, there are no studies in the literature assessing practitioners' attitudes toward the treatment of cracked teeth. This research recorded variations between general practitioners and specialist groups regarding the treatment approaches of cracked teeth. In a cross-sectional structured questionnaire survey, 32 prosthodontists, 34 endodontists, and 29 general practitioners working in public and private dental health services in Kuwait were assessed regarding their treatment approach to 5 different clinical cracked tooth scenarios...
July 19, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28734607/impact-of-instrument-and-column-parameters-on-high-throughput-liquid-chromatography-performance
#17
Martin Gilar, Thomas S McDonald, Fabrice Gritti
The speed and separation performance of high-throughput liquid chromatography (HT LC) was investigated. We evaluated the contributions of various experimental parameters to the total analysis cycle time, including column length (column void time), gradient delay, flow rate, auto-sampler (A/S) speed, and software related delays. The best case injection-to-injection cycle time of 22s was achieved using 12s gradient time and 2.1×20mm columns packed with 1.7μm C18 particles. The total 22s analytical duty cycle consisted of 2...
July 11, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28733436/survival-by-birth-weight-and-gestational-age-in-individuals-with-congenital-heart-disease-a-population-based-study
#18
Kate E Best, Peter W G Tennant, Judith Rankin
BACKGROUND: Congenital heart disease (CHD) survival estimates are important to understand prognosis and evaluate health and social care needs. Few studies have reported CHD survival estimates according to maternal and fetal characteristics. This study aimed to identify predictors of CHD survival and report conditional survival estimates. METHODS AND RESULTS: Cases of CHD (n=5070) born during 1985-2003 and notified to the Northern Congenital Abnormality Survey (NorCAS) were matched to national mortality information in 2008...
July 21, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28732684/the-impact-of-current-infection-levels-on-the-cost-benefit-of-vaccination
#19
Matt J Keeling, Katherine A Broadfoot, Samik Datta
When considering a new vaccine programme or modifying an existing one, economic cost-benefit analysis, underpinned by predictive epidemiological modelling, is a key component. This analysis is intimately linked to the willingness to pay for additional QALYs (quality-adjusted life-years) gained; currently in England and Wales a health programme is economically viable if the cost per QALY gained is less than £ 20,000, and models are often used to assess if a vaccine programme is likely to fall below this threshold cost...
July 8, 2017: Epidemics
https://www.readbyqxmd.com/read/28731730/uhlmann-connection-in-fermionic-systems-undergoing-phase-transitions
#20
Bruno Mera, Chrysoula Vlachou, Nikola Paunković, Vítor R Vieira
We study the behavior of the Uhlmann connection in systems of fermions undergoing phase transitions. In particular, we analyze some of the paradigmatic cases of topological insulators and superconductors in one dimension, as well as the BCS theory of superconductivity in three dimensions. We show that the Uhlmann connection signals phase transitions in which the eigenbasis of the state of the system changes. Moreover, using the established fidelity approach and the study of the edge states, we show the absence of thermally driven phase transitions in the case of topological insulators and superconductors...
July 7, 2017: Physical Review Letters
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