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Generalized linear model

Zakaria Aboulbanine, Naïma El Khayati
The use of phase space in medical linear accelerator Monte Carlo (MC) simulations significantly improves the execution time and leads to results comparable to those obtained from full calculations. The classical representation of phase space stores directly the information of millions of particles, producing bulky files. This paper presents a virtual source model (VSM) based on a reconstruction algorithm, taking as input a compressed file of roughly 800 kb derived from phase space data freely available in the International Atomic Energy Agency (IAEA) database...
March 19, 2018: Physics in Medicine and Biology
Kumar Mukherjee, Khalid M Kamal
Background Atrial fibrillation is a significant risk factor for ischemic stroke and increases cost of treatment. Aims To estimate the incremental inpatient cost and length of stay due to atrial fibrillation among adults hospitalized with a primary diagnosis of ischemic stroke after controlling for sociodemographic, clinical, and hospital characteristics in a nationally representative discharge record of US population. Methods Hospital discharge records with a primary diagnosis of ischemic stroke were identified from the National Inpatient Sample data for the years 2010-2013...
January 1, 2018: International Journal of Stroke: Official Journal of the International Stroke Society
Po-Chia Chen, Pawel Masiewicz, Vladimir Rybin, Dmitri I Svergun, Janosch Hennig
We present a screening protocol utilizing small-angle X-ray scattering (SAXS) to obtain structural information of biomolecular interactions independent of prior knowledge, so as to complement affinity-based screening and provide leads for further exploration. This protocol categorizes ligand titrations by computing pair-wise agreement between curves, and separately estimates affinities by quantifying complex formation as a departure from the linear sum properties of solution SAXS. The protocol is validated by sparse sequence search around the native poly-uridine RNA motifs of the two-RRM domain Sex-lethal protein (Sxl)...
March 19, 2018: ACS Combinatorial Science
Ricardo Cáceda, W Sue T Griffin, Pedro L Delgado
BACKGROUND: Increased inflammation is linked to suicide risk. However, it is unclear whether increased inflammation drives suicidal crises or is a trait associated with lifetime suicidal behavior. Limited data exist on the sources of increased inflammation observed in suicidal patients and on its downstream effects. AIMS: To examine factors associated with inflammation and with suicidal ideation severity in acutely suicidal depressed patients. METHODS: Fifty-two adult depressed patients of both sexes hospitalized for severe suicidal ideation were characterized for suicidality, depression, anxiety, medical comorbidity, psychological and physical pain, impulsivity, verbal fluency, C-reactive protein (CRP) and interleukin (IL) 6...
March 1, 2018: Journal of Psychopharmacology
Megan C Roberts, Rebecca A Ferrer, Katharine A Rendle, Sarah C Kobrin, Stephen H Taplin, Bradford W Hesse, William M P Klein
INTRODUCTION: Appreciating the accuracy and value of cancer screening is essential to informed decision making about screening. This study's objectives were to (1) examine people's beliefs about the accuracy and value of cancer screening, and (2) determine whether sociodemographics, cancer beliefs, and shared decision making are associated with these beliefs. METHODS: Data from the National Cancer Institute's Health Information National Trends Survey (cycle 4, August-November 2014) were used...
March 15, 2018: American Journal of Preventive Medicine
Minjung Park, Jennifer Hunter, Soonman Kwon
High demand for traditional Korean medicine led to a policy change in 2010 allowing hospitals to provide Integrative medicine care that combines Western medicine and Korean medicine. This study evaluated the effects of Integrative medicine compared to Western medicine-only for managing acute stroke in South Korean hospitals. A retrospective matched case-control observational study was conducted for acute stroke patients admitted nationwide in 2012 and 2013. Propensity score matching was used to adjust for the likelihood of selecting Integrative medicine...
March 6, 2018: Health Policy
Arch Creasy, Joseph Lomino, Gregory Barker, Anurag Khetan, Giorgio Carta
Protein retention in hydrophobic interaction chromatography is described by the solvophobic theory as a function of the kosmostropic salt concentration. In general, an increase in salt concentration drives protein partitioning to the hydrophobic surface while a decrease reduces it. In some cases, however, protein retention also increases at low salt concentrations resulting in a U-shaped retention factor curve. During gradient elution the salt concentration is gradually decreased from a high value thereby reducing the retention factor and increasing the protein chromatographic velocity...
March 9, 2018: Journal of Chromatography. A
Belen Ponte, Menno Pruijm, Daniel Ackermann, Georg Ehret, Nicholas Ansermot, Jan A Staessen, Bruno Vogt, Antoinette Pechère-Bertschi, Michel Burnier, Pierre-Yves Martin, Chin B Eap, Murielle Bochud, Idris Guessous
OBJECTIVE: To assess the influence of caffeine on arterial stiffness by exploring the association of urinary excretion of caffeine and its related metabolites with pulse pressure (PP) and pulse wave velocity (PWV). PARTICIPANTS AND METHODS: Families were randomly selected from the general population of 3 Swiss cities from November 25, 2009, through April 4, 2013. Pulse pressure was defined as the difference between the systolic and diastolic blood pressures obtained by 24-hour ambulatory monitoring...
March 15, 2018: Mayo Clinic Proceedings
Mehran Mazandarani, Naser Pariz
This paper deals with sub-optimal control of a fuzzy linear dynamical system. The aim is to keep the state variables of the fuzzy linear dynamical system close to zero in an optimal manner. In the fuzzy dynamical system, the fuzzy derivative is considered as the granular derivative; and all the coefficients and initial conditions can be uncertain. The criterion for assessing the optimality is regarded as a granular integral whose integrand is a quadratic function of the state variables and control inputs. Using the relative-distance-measure (RDM) fuzzy interval arithmetic and calculus of variations, the optimal control law is presented as the fuzzy state variables feedback...
March 16, 2018: ISA Transactions
Nesibe Gül Yüksel Aslıer, Selhan Gürkan, Mustafa Aslıer, Günay Kirkim, Enis Alpin Güneri, Ahmet Ömer Ikiz
OBJECTIVE: The purpose of this prospective case-control study is to evaluate the sound energy absorbance characteristics of cartilage grafts in patients, who have undergone type 1 cartilage tympanoplasty. METHODS: Thirty-four operated ears of 32 patients and 70 ears of 35 control subjects were included. Differences of pure-tone audiometry thresholds and wideband ambient-pressure absorbance ratios with respect to the graft material, graft thickness, cartilage surface area ratio and elapsed time after surgery were analyzed...
March 15, 2018: Auris, Nasus, Larynx
Melanie K Bean, Bethany Brady Spalding, Elizabeth Theriault, Kayla-Brooke Dransfield, Alexandra Sova, Mary Dunne Stewart
OBJECTIVE: To evaluate the 1-month impact of salad bars on fruit and vegetable (FV) selection, intake, and waste. DESIGN: Pre-post quasi-experimental design. SETTING: Title I elementary schools in a large, urban district in central Virginia. PARTICIPANTS: Students (grades 1-5; >95% African American) from 2 elementary schools participated in plate waste assessments (282 plates were rated at baseline, 443 at post-assessment); fourth- and fifth-grade students from 15 (of 18 eligible) schools (n = 1,193) responded to surveys...
March 14, 2018: Journal of Nutrition Education and Behavior
Nicholas A Kolaitis, Allison Soong, Pavan Shrestha, Hanjing Zhuo, John Neuhaus, Patti P Katz, John R Greenland, Jeffrey Golden, Lorriana E Leard, Rupal J Shah, Steven R Hays, Jasleen Kukreja, Mary Ellen Kleinhenz, Paul D Blanc, Jonathan P Singer
OBJECTIVE: Extracorporeal membrane oxygenation (ECMO) is increasingly used as a bridge to lung transplantation. The impact of preoperative ECMO on health-related quality of life (HRQL) and depressive symptoms after lung transplantation remains unknown, however. METHODS: In a single-center prospective cohort study, we assessed HRQL and depressive symptoms before and at 3, 6, and 12 months after lung transplantation using the Short Form 12 Physical and Mental Component Scores (SF12-PCS and SF12-MCS), Airway Questionnaire 20-Revised (AQ20R), EuroQol 5D (EQ5D), and Geriatric Depression Scale (GDS)...
February 22, 2018: Journal of Thoracic and Cardiovascular Surgery
Martha Kim, Ho-Kyung Choung, Kyoung Min Lee, Sohee Oh, Seok Hwan Kim
PURPOSE: To delineate longitudinal changes in the optic nerve head (ONH) and peripapillary structure during myopia progression in childhood using spectral-domain (SD) OCT and to explore the factors associated with myopic ONH and peripapillary changes. DESIGN: Prospective cohort study. PARTICIPANTS: Twenty-three healthy children with myopia (46 eyes). METHODS: The participants underwent fundus photography, SD OCT, and axial length (AXL) measurements every 6 months for 2 years...
March 14, 2018: Ophthalmology
Liping Chen, Ting Xiao, Liling Chen, Shanshan Xie, Maoqing Deng, Dingchang Wu
BACKGROUND: Genetic factors have a vital influence on the pathogenesis of hypertension. In this retrospective study, we aimed to evaluate the association of ADRB1 and CYP2D6 polymorphisms with antihypertensive effects and perform an analysis of their contribution to hypertension risk. METHODS: A total of 261 healthy individuals and 261 essential hypertension patients treated with metoprolol for 12 weeks were enrolled. ADRB1 and CYP2D6 genotypes were identified by xTAG liquid chip technology...
March 2018: American Journal of the Medical Sciences
Garrett Otto, Sharon Bewick, Bingtuan Li, William F Fagan
In this paper, we develop a phenologically explicit reaction-diffusion model to analyze the spatial spread of a univoltine insect species. Our model assumes four explicit life stages: adult, two larval, and pupa, with a fourth, implicit, egg stage modeled as a time delay between oviposition and emergence as a larva. As such, our model is broadly applicable to holometabolous insects. To account for phenology (seasonal biological timing), we introduce four time-dependent phenological functions describing adult emergence, oviposition and larval conversion, respectively...
March 16, 2018: Bulletin of Mathematical Biology
Wenting Kang, Yajie Feng, Caishan Liu, Raphael Blumenfeld
Understanding the response of granular matter to intrusion of solid objects is key to modelling many aspects of behaviour of granular matter, including plastic flow. Here we report a general model for such a quasistatic process. Using a range of experiments, we first show that the relation between the penetration depth and the force resisting it, transiently nonlinear and then linear, is scalable to a universal form. We show that the gradient of the steady-state part, Kϕ , depends only on the medium's internal friction angle, ϕ, and that it is nonlinear in μ = tan ϕ, in contrast to an existing conjecture...
March 16, 2018: Nature Communications
Mohsen Mazidi, Hassan Vatanparast
OBJECTIVES: In the current study we aimed to assess whether the food security is associated with serum trans-fatty acids (TFAs) and dietary fat. METHODS: Analyses were restricted to participants (from the US National Health and Nutrition Examination Survey) with data available on serum and diet TFAs and food security status from 2009 to 2010. All statistical analyses (analysis of covariance and linear regression) accounted for the survey design and sample weights...
March 7, 2018: Nutrition & Diabetes
Armando Silva Almodovar, Swatee Surve, David Rhys Axon, David Cooper, Milap C Nahata
BACKGROUND: Inadequacies in mental health care coverage remain an enormous problem in the United States. Barriers include scarcity of accessible mental health care professionals. Use of a mental health mobile app incorporating social cognitive theory may help improve confidence in coping skills and improve anxiety and depression. Sinasprite is a mobile app that recruited users via self-referral and clinician referral. Users completed questionnaires to obtain demographic and medical histories...
March 16, 2018: JMIR MHealth and UHealth
Catherine Bourgeois, Tania Lecomte, Isabelle Daigneault
Child sexual abuse has been identified as a potential risk factor for developing a psychotic disorder. However, little is known about the prevalence of psychotic disorders in youth who were sexually abused during adolescence and young adulthood. Gender differences also remain unclear. This study used administrative databases from a Child Protection Agency and a public health care system. It aimed to investigate the prevalence of psychotic disorders in sexually abused youth between the first substantiated report of sexual abuse and the beginning of adulthood...
March 13, 2018: Schizophrenia Research
Agnus M Kim, Jin Yong Lee, Jayeun Kim
BACKGROUND: According to prior studies, it is possible to consider the emergency care utilization due to ambulatory care sensitive conditions (ACSCs) as a proxy measure of access to primary care but there was no confirmed study among people with disabilities. OBJECTIVE/HYPOTHESIS: We examined overall emergency department (ED) utilization patterns among people with disabilities compared with the general population and estimated factors affecting ED utilization. Additionally, we examined whether there were any differences in ED visits due to ACSCs according to type and severity of disability...
March 9, 2018: Disability and Health Journal
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