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Geographically weighted regression

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https://www.readbyqxmd.com/read/28346028/prevalence-and-associated-factors-for-self-reported-asthma-in-a-canadian-population-the-canadian-community-health-survey-2014
#1
Luan M Chu, Punam Pahwa
BACKGROUND: Asthma prevalence is increasing among adults, yet limited information regarding the association between adult asthma and environmental and personal exposures is available using large nationally representative population-based survey. OBJECTIVE: To determine the prevalence of asthma and associated factors for self-reported asthma in a Canadian population aged 12 years and older by using the Canadian Community Health Survey (CCHS) 2014 cross-sectional cohort...
March 27, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28344118/geographic-variation-in-the-relationship-between-body-mass-index-and-the-built-environment
#2
Anna M Adachi-Mejia, Chanam Lee, Chunkuen Lee, Heather A Carlos, Brian E Saelens, Ethan M Berke, Mark P Doescher
Studies examining associations between weight status and neighborhood built environment (BE) have shown inconsistent results and have generally focused on urban settings. However, many Americans do not live in metropolitan areas and BE impacts may be different outside of metropolitan areas. We sought to examine whether the relationship between body mass index (BMI) and neighborhood BE exists and varies by geographic region across small towns in the United States. We conducted telephone surveys with 2156 adults and geographic information systems data in nine towns located within three geographic regions (Northeast, Texas, Washington) in 2011 and 2012...
March 23, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28334585/uptake-and-utilization-of-practice-guidelines-in-hospitals-in-the-united-states-the-case-of-routine-episiotomy
#3
Katy B Kozhimannil, Pinar Karaca-Mandic, Cori J Blauer-Peterson, Neel T Shah, Jonathan M Snowden
BACKGROUND: The gap between publishing and implementing guidelines differs based on practice setting, including hospital geography and teaching status. On March 31, 2006, a Practice Bulletin published by the American College of Obstetricians and Gynecologists (ACOG) recommended against the routine use of episiotomy and urged clinicians to make judicious decisions to restrict the use of the procedure. OBJECTIVE: This study investigated changes in trends of episiotomy use before and after the ACOG Practice Guideline was issued in 2006, focusing on differences by hospital geographic location (rural/urban) and teaching status...
January 2017: Joint Commission Journal on Quality and Patient Safety
https://www.readbyqxmd.com/read/28281323/demerelate-calculating-inter-individual-relatedness-for-kinship-analysis-based-on-co-dominant-diploid-genetic-markers-using-r
#4
Philipp Kraemer, Gabriele Gerlach
The Demerelate package offers algorithms to calculate different inter-individual relatedness measurements. Three different allele sharing indices, five pairwise weighted estimates of relatedness and four pairwise weighted estimates with sample size correction are implemented to analyze kinship structures within populations. Statistics are based on randomization tests; modeling relatedness coefficients by logistic regression, modeling relatedness with geographic distance by mantel correlation and comparing mean relatedness between populations using pairwise t-tests...
March 9, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/28281057/the-death-of-the-circulatory-system-diseases-in-china-provincial-socioeconomic-and-environmental-perspective
#5
Haixia Pu, Jiatian Li, Pin Wang, Linlin Cui, Huaxin Wang
Few studies have explored the association between circulatory system diseases (CSDs) and provincial socioeconomic and environmental factors from spatial perspective, although large literature have focused on CSD. The numbers of death of hypertension disease (HD), ischemic heart disease (IHD), and cerebrovascular disease (CVD) are investigated, and 14 representative socioeconomic and environmental factors are collected. Stepwise regression model (SRM) and geographically weighted regression model (GWRM) are applied to determine the spatial correlation between the number of death of those diseases and selected factors...
March 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28278180/is-the-current-pertussis-incidence-only-the-results-of-testing-a-spatial-and-space-time-analysis-of-pertussis-surveillance-data-using-cluster-detection-methods-and-geographically-weighted-regression-modelling
#6
Boris Kauhl, Jeanne Heil, Christian J P A Hoebe, Jürgen Schweikart, Thomas Krafft, Nicole H T M Dukers-Muijrers
BACKGROUND: Despite high vaccination coverage, pertussis incidence in the Netherlands is amongst the highest in Europe with a shifting tendency towards adults and elderly. Early detection of outbreaks and preventive actions are necessary to prevent severe complications in infants. Efficient pertussis control requires additional background knowledge about the determinants of testing and possible determinants of the current pertussis incidence. Therefore, the aim of our study is to examine the possibility of locating possible pertussis outbreaks using space-time cluster detection and to examine the determinants of pertussis testing and incidence using geographically weighted regression models...
2017: PloS One
https://www.readbyqxmd.com/read/28273035/the-association-of-household-food-security-household-characteristics-and-school-environment-with-obesity-status-among-off-reserve-first-nations-and-m%C3%A3-tis-children-and-youth-in-canada-results-from-the-2012-aboriginal-peoples-survey
#7
Jasmin Bhawra, Martin J Cooke, Yanling Guo, Piotr Wilk
INTRODUCTION: Indigenous children are twice as likely to be classified as obese and three times as likely to experience household food insecurity when compared with non- Indigenous Canadian children. The purpose of this study was to explore the relationship between food insecurity and weight status among Métis and off-reserve First Nations children and youth across Canada. METHODS: We obtained data on children and youth aged 6 to 17 years (n = 6900) from the 2012 Aboriginal Peoples Survey...
March 2017: Health Promotion and Chronic Disease Prevention in Canada
https://www.readbyqxmd.com/read/28272334/improving-the-accuracy-of-urban-environmental-quality-assessment-using-geographically-weighted-regression-techniques
#8
Kamil Faisal, Ahmed Shaker
Urban Environmental Quality (UEQ) can be treated as a generic indicator that objectively represents the physical and socio-economic condition of the urban and built environment. The value of UEQ illustrates a sense of satisfaction to its population through assessing different environmental, urban and socio-economic parameters. This paper elucidates the use of the Geographic Information System (GIS), Principal Component Analysis (PCA) and Geographically-Weighted Regression (GWR) techniques to integrate various parameters and estimate the UEQ of two major cities in Ontario, Canada...
March 7, 2017: Sensors
https://www.readbyqxmd.com/read/28264003/significance-of-major-international-seaports-in-the-distribution-of-murine-typhus-in-taiwan
#9
Chi-Chien Kuo, Nicola Wardrop, Chung-Te Chang, Hsi-Chieh Wang, Peter M Atkinson
BACKGROUND: International seaports are hotspots for disease invasion and pathogens can persist in seaports even after ports are abandoned. Transmitted by fleas infected by Rickettsia typhi, murine typhus, a largely neglected and easily misdiagnosed disease, is known to occur primarily in large seaports. However, the significance of seaports in the occurrence of murine typhus has never been validated quantitatively. METHODOLOGY/PRINCIPAL FINDINGS: We studied the spatial distribution of murine typhus, a notifiable disease, in Taiwan...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28256422/geographical-disparities-in-hiv-prevalence-and-care-among-men-who-have-sex-with-men-in-malawi-results-from-a-multisite-cross-sectional-survey
#10
Andrea L Wirtz, Gift Trapence, Dunker Kamba, Victor Gama, Rodney Chalera, Vincent Jumbe, Rosemary Kumwenda, Marriam Mangochi, Stephane Helleringer, Chris Beyrer, Stefan Baral
BACKGROUND: Epidemiological assessment of geographical heterogeneity of HIV among men who have sex with men (MSM) is necessary to inform HIV prevention and care strategies in the more generalised HIV epidemics across sub-Saharan Africa, including Malawi. We aimed to measure the HIV prevalence, risks, and access to HIV care among MSM across multiple localities to better inform HIV programming for MSM in Malawi. METHODS: Between Aug 1, 2011, and Sept 13, 2014, we recruited MSM into cross-sectional research via respondent-driven sampling (RDS) in seven districts of Malawi...
February 27, 2017: Lancet HIV
https://www.readbyqxmd.com/read/28241389/temperature-fine-tunes-mediterranean-arabidopsis-thaliana-life-cycle-phenology-geographically
#11
A Marcer, D S Vidigal, P M A James, M-J Fortin, B Méndez-Vigo, H W M Hilhorst, L Bentsink, C Alonso-Blanco, F X Picó
To understand how adaptive evolution in life-cycle phenology operates in plants, we need to unravel the effects of geographical variation in putative agents of natural selection on life-cycle phenology by considering all key developmental transitions and their co-variation patterns. We address this goal by quantifying the temperature-driven and geographically varying relationship between seed dormancy and flowering time in the annual Arabidopsis thaliana across the Iberian Peninsula. We used data on genetic variation in two major life-cycle traits, seed dormancy (DSDS50) and flowering time (FT), in a collection of 300 A...
February 27, 2017: Plant Biology
https://www.readbyqxmd.com/read/28225805/prevalence-and-risk-factors-of-chlamydia-infection-in-hong-kong-a-population-based-geospatial-household-survey-and-testing
#12
William Chi Wai Wong, Yanping Zhao, Ngai Sze Wong, William L Parish, Heidi Yin Hai Miu, Li-Gang Yang, Michael Emch, King Man Ho, Francois Yeung Fong, Joseph D Tucker
BACKGROUND: Chlamydia causes infertility and increases risk of HIV infection, and population-based studies provide essential information for effective infection control and prevention. This study examined Chlamydia trachomatis prevalence and risk factors among a representative sample of 18-49-year-old residents in Hong Kong. METHODS: Census boundary map of 412 constituency areas was used as primary sampling units to construct the sampling frame and, residential buildings and units were randomly selected using geospatial modelling...
2017: PloS One
https://www.readbyqxmd.com/read/28214120/linking-potential-heat-source-and-sink-to-urban-heat-island-heterogeneous-effects-of-landscape-pattern-on-land-surface-temperature
#13
Weifeng Li, Qiwen Cao, Kun Lang, Jiansheng Wu
Rapid urbanization has significantly contributed to the development of urban heat island (UHI). Regulating landscape composition and configuration would help mitigate the UHI in megacities. Taking Shenzhen, China, as a case study area, we defined heat source and heat sink and identified strong and weak sources as well as strong and weak sinks according to the natural and socioeconomic factors influencing land surface temperature (LST). Thus, the potential thermal contributions of heat source and heat sink patches were differentiated...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28208207/-spatial-distribution-of-type-2-diabetes-mellitus-in-berlin-application-of-a-geographically-weighted-regression-analysis-to-identify-location-specific-risk-groups
#14
Boris Kauhl, Jonas Pieper, Jürgen Schweikart, Andrea Keste, Marita Moskwyn
Understanding which population groups in which locations are at higher risk for type 2 diabetes mellitus (T2DM) allows efficient and cost-effective interventions targeting these risk-populations in great need in specific locations. The goal of this study was to analyze the spatial distribution of T2DM and to identify the location-specific, population-based risk factors using global and local spatial regression models. To display the spatial heterogeneity of T2DM, bivariate kernel density estimation was applied...
February 16, 2017: Das Gesundheitswesen
https://www.readbyqxmd.com/read/28196113/chasm-in-primary-care-provision-in-a-universal-health-system-findings-from-a-nationally-representative-survey-of-health-facilities-in-malaysia
#15
Huy Ming Lim, Sheamini Sivasampu, Ee Ming Khoo, Kamaliah Mohamad Noh
BACKGROUND: Malaysia has achieved universal health coverage since 1980s through the expansion of direct public provision, particularly in rural areas. However, no systematic examination of the rural-urban distribution of primary care services and resources has been conducted to date for policy impact evaluation. METHODS: We conducted a national cross-sectional survey of 316 public and 597 private primary care clinics, selected through proportionate stratified random sampling, from June 2011 through February 2012...
2017: PloS One
https://www.readbyqxmd.com/read/28166300/impacts-of-human-related-practices-on-ommatissus-lybicus-infestations-of-date-palm-in-oman
#16
Khalifa M Al-Kindi, Paul Kwan, Nigel R Andrew, Mitchell Welch
Date palm cultivation is economically important in the Sultanate of Oman, with significant financial investments coming from both the government and private individuals. However, a widespread Dubas bug (DB) (Ommatissus lybicus Bergevin) infestation has impacted regions including the Middle East, North Africa, Southeast Russia, and Spain, resulting in widespread damages to date palms. In this study, techniques in spatial statistics including ordinary least squares (OLS), geographically weighted regression (GRW), and exploratory regression (ER) were applied to (a) model the correlation between DB infestations and human-related practices that include irrigation methods, row spacing, palm tree density, and management of undercover and intercropped vegetation, and (b) predict the locations of future DB infestations in northern Oman...
2017: PloS One
https://www.readbyqxmd.com/read/28164370/impact-of-neighbourhood-level-inequity-on-paediatric-diabetes-care
#17
A B M Clarke, D Daneman, J R Curtis, F H Mahmud
AIMS: To evaluate the association between neighbourhood-level inequity and glycaemic control in paediatric participants with Type 1 diabetes using the Neighbourhood Equity Index (NEI). METHODS: The NEI was linked to the clinical data of 519 children with diabetes followed at the Hospital for Sick Children (Toronto, Canada). The NEI is a composite measure of inequity developed using the World Health Organization's Urban Health Equity Assessment and Response Tool (HEART), which encompasses 15 weighted indicators evaluating economic, social, environmental and lifestyle factors...
February 6, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28154108/contextual-correlates-of-physical-activity-among-older-adults-a-neighborhood-environment-wide-association-study-ne-was
#18
Stephen J Mooney, Spruha Joshi, Magdalena Cerdá, Gary J Kennedy, John R Beard, Andrew G Rundle
Background Few older adults achieve recommended physical activity levels. We conducted a 'Neighborhood Environment-Wide Association Study (NE-WAS)' of neighborhood influences on physical activity among older adults, analogous, in a genetic context, to a Genome Wide Association Study (GWAS). Methods Physical Activity Scale for the Elderly (PASE) and socio-demographic data were collected via telephone survey of 3,497 residents of New York City aged 65-75. Using Geographic Information Systems, we created 337 variables describing each participant's residential neighborhood's built, social, and economic context...
February 2, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28146172/regional-differences-and-factors-associated-with-the-number-of-prenatal-visits-in-brazil-analysis-of-the-information-system-on-live-births-in-2013
#19
Juliana Cristine Dos Anjos, Antonio Fernando Boing
Objective: To investigate factors associated with seven or more prenatal visits, in Brazil, in 2013. Methods: Cross-sectional study from the database of Information System on Live Births. The association of explanatory variables was tested with prenatal visits by means of the analysis of single and multiple multinomial regressions. The spatial distribution of prenatal visits according to the Brazilian municipalities was also analyzed. Results: It was found that 2...
October 2016: Revista Brasileira de Epidemiologia, Brazilian Journal of Epidemiology
https://www.readbyqxmd.com/read/28127773/does-the-regulatory-environment-affect-nurse-practitioners-patterns-of-practice-or-quality-of-care-in-health-centers
#20
Ellen T Kurtzman, Burt S Barnow, Jean E Johnson, Samuel J Simmens, Donna Lind Infeld, Fitzhugh Mullan
OBJECTIVE: To examine the impact of state-granted nurse practitioner (NP) independence on patient-level quality, service utilization, and referrals. DATA SOURCES/STUDY SETTING: The National Ambulatory Medical Care Survey's community health center (HC) subsample (2006-2011). Primary analyses included approximately 6,500 patient visits to 350 NPs in 220 HCs. STUDY DESIGN: Propensity score matching and multivariate regression analysis were used to estimate the impact of state-granted NP independence on each outcome, separately...
February 2017: Health Services Research
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