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Geographically weighted regression

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https://www.readbyqxmd.com/read/28092058/sub-regional-assessment-of-hpv-vaccination-among-female-adolescents-in-the-intermountain-west-and-implications-for-intervention-opportunities
#1
Julia Bodson, Qian Ding, Echo L Warner, Amy J Hawkins, Kevin A Henry, Deanna Kepka
Objectives We investigated the similarities and differences in the factors related to human papillomavirus (HPV) vaccination of female adolescents in three sub-regions of the Intermountain West (IW). Methods We analyzed 2011-2012 National Immunization Survey-Teen data. Respondents (parents) who were living in the IW and who had daughters aged 13-17 years old with provider-verified immunization records were included in our analyses. East, Central, and West sub-regions were defined based on geographic contiguity and similarity in HPV vaccination rates and sociodemographic characteristics...
January 13, 2017: Maternal and Child Health Journal
https://www.readbyqxmd.com/read/28079138/spatiotemporal-pattern-of-pm2-5-concentrations-in-mainland-china-and-analysis-of-its-influencing-factors-using-geographically-weighted-regression
#2
Jieqiong Luo, Peijun Du, Alim Samat, Junshi Xia, Meiqin Che, Zhaohui Xue
Based on annual average PM2.5 gridded dataset, this study first analyzed the spatiotemporal pattern of PM2.5 across Mainland China during 1998-2012. Then facilitated with meteorological site data, land cover data, population and Gross Domestic Product (GDP) data, etc., the contributions of latent geographic factors, including socioeconomic factors (e.g., road, agriculture, population, industry) and natural geographical factors (e.g., topography, climate, vegetation) to PM2.5 were explored through Geographically Weighted Regression (GWR) model...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28077125/spatiotemporal-epidemic-characteristics-and-risk-factor-analysis-of-malaria-in-yunnan-province-china
#3
Dongyang Yang, Chengdong Xu, Jinfeng Wang, Yong Zhao
BACKGROUND: Malaria remains an important public health concern in China and is particularly serious in Yunnan, a China's provincial region of high malaria burden with an incidence of 1.79/10(5) in 2012. This study aims to examine the epidemiologic profile and spatiotemporal aspects of epidemics of malaria, and to examine risk factors which may influence malaria epidemics in Yunnan Province. METHODS: The data of malaria cases in 2012 in 125 counties of Yunnan Province was used in this research...
January 11, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28055125/effects-of-amphibian-phylogeny-climate-and-human-impact-on-the-occurrence-of-the-amphibian-killing-chytrid-fungus
#4
Leonardo D Bacigalupe, Claudio Soto-Azat, Cristobal García-Vera, Ismael Barría-Oyarzo, Enrico L Rezende
Chytridiomycosis, due to the fungus Batrachochytrium dendrobatidis (Bd), has been associated with the alarming decline and extinction crisis of amphibians worldwide. Because conservation programs are implemented locally, it is essential to understand how the complex interactions among host species, climate and human activities contribute to Bd occurrence at regional scales. Using weighted phylogenetic regressions and model selection, we investigated geographic patterns of Bd occurrence along a latitudinal gradient of 1,500 km within a biodiversity hotspot in Chile (1,845 individuals sampled from 253 sites and representing 24 species), and its association with climatic, socio-demographic and economic variables...
January 5, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28054571/factors-associated-with-awareness-treatment-and-control-of-hypertension-in-a-disadvantaged-rural-indian-population
#5
D Busingye, S Arabshahi, R G Evans, V K Srikanth, K Kartik, K Kalyanram, M A Riddell, X Zhu, O Suresh, A G Thrift
The aim of this study was to identify factors associated with awareness, treatment and control of hypertension in a rural setting in India. Following screening of the population, all individuals with hypertension (blood pressure (BP) ⩾140/90 mm Hg or taking antihypertensive medications) were invited to participate in this study. We measured BP, height, weight, skinfolds, waist and hip circumference, and administered a questionnaire to obtain information regarding socioeconomic and behavioural characteristics...
January 5, 2017: Journal of Human Hypertension
https://www.readbyqxmd.com/read/28040221/spatial-patterns-and-origins-of-heavy-metals-in-sheyang-river-catchment-in-jiangsu-china-based-on-geographically-weighted-regression
#6
Shan-Shan Wu, Hao Yang, Fei Guo, Rui-Ming Han
Multivariate statistical analyses combined with geographically weighted regression (GWR) were used to identify spatial variations of heavy metals in sediments and to examine relationships between metal pollution and land use practices in watersheds, including urban land, agriculture land, forest and water bodies. Seven metals (Cu, Zn, Pb, Cr, Ni, Mn and Fe) of sediments were measured at 31 sampling sites in Sheyang River. Most metals were under a certain degree enrichment based on the enrichment factors. Cluster analysis grouped all sites into four statistically significant cluster, severely contaminated areas were concentrated in areas with intensive human activities...
December 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28040215/the-impact-of-anthropogenic-emissions-and-meteorological-conditions-on-the-spatial-variation-of-ambient-so2-concentrations-a-panel-study-of-113-chinese-cities
#7
Xue Yang, Shaojian Wang, Wenzhong Zhang, Dongsheng Zhan, Jiaming Li
China has received increased international criticism in recent years in relation to its air pollution levels, both in terms of the transmission of pollutants across international borders and the attendant adverse health effects being witnessed. Whilst existing research has examined the factors influencing ambient air pollutant concentrations, previous studies have failed to adequately explore the determinants of such concentrations from either a source or diffusion perspective. This study addressed both source (specifically, anthropogenic emissions) and diffusion (namely, meteorological conditions) indicators, in order to detect their respective impacts on the spatial variations seen in the distribution of air pollution...
December 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28039036/nutritional-intake-depressive-symptoms-and-vitamin-d-status-in-hypertensive-patients-in-the-north-of-iran-a-case-control-study
#8
A Salari, M Mahdavi-Roshan, T Hasandokht, M Gholipour, S Soltanipour, M Nagshbandi, A Javadzadeh
OBJECTIVE: We investigated vitamin D status, body size, nutritional intake and depression status in hypertensive patients in the north of Iran that have special dietary habit and lifestyle according to their culture and geographical situation. MATERIALS AND METHODS: This study was conducted on 127 patients with newly recognized hypertension and the 120 normal participants, in the north of Iran. Anthropometric data was measured and demographic characteristics, dietary intake, depression and medical status were collected by valid questionnaires...
December 27, 2016: Hipertensión y Riesgo Vascular
https://www.readbyqxmd.com/read/28018997/an-overview-of-geospatial-methods-used-in-unintentional-injury-epidemiology
#9
REVIEW
Himalaya Singh, Lauren V Fortington, Helen Thompson, Caroline F Finch
BACKGROUND: Injuries are a leading cause of death and disability around the world. Injury incidence is often associated with socio-economic and physical environmental factors. The application of geospatial methods has been recognised as important to gain greater understanding of the complex nature of injury and the associated diverse range of geographically-diverse risk factors. Therefore, the aim of this paper is to provide an overview of geospatial methods applied in unintentional injury epidemiological studies...
December 2016: Injury Epidemiology
https://www.readbyqxmd.com/read/28018597/associations-between-unhealthy-dieting-behaviors-and-tobacco-use-among-adolescents
#10
Megan E Sutter, Aashir Nasim, Susan Veldheer, Caroline O Cobb
BACKGROUND: Cigarette smoking is an important risk factor for unhealthy dieting behaviors (UDBs) in youth. The role of alternative tobacco products and UDB engagement has yet to be examined empirically despite concerning trends in use. This study aimed to examine UDB prevalence in a U.S. geographic region-specific adolescent sample and associations with a variety of tobacco use behaviors and perceptions. METHODS: Weighted data from the 2013 Virginia Youth Survey were analyzed (n = 6903)...
2016: Journal of Eating Disorders
https://www.readbyqxmd.com/read/28017415/comparison-of-industrial-emissions-and-carpet-dust-concentrations-of-polychlorinated-dibenzo-p-dioxins-and-polychlorinated-dibenzofurans-in-a-multi-center-u-s-study
#11
Nicole C Deziel, John R Nuckols, Rena R Jones, Barry I Graubard, Anneclaire J De Roos, Anjoeka Pronk, Chris Gourley, Joanne S Colt, Mary H Ward
Proximity to facilities emitting polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/F) has been associated with increased risk of non-Hodgkin lymphoma (NHL). There is limited information about whether proximity to industrial sources leads to indoor PCDD/F contamination of homes. We measured carpet dust concentrations (pg/g) of 17 toxic PCDD/F congeners and calculated their toxic equivalence (TEQ) in 100 homes in a population-based case-control study of NHL in Detroit, Los Angeles, Seattle, and Iowa (1998-2000)...
December 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28006020/albuminuria-is-associated-with-open-angle-glaucoma-in-nondiabetic-korean-subjects-a-cross-sectional-study
#12
Gyu Ah Kim, Se Hee Park, Jaesang Ko, Si Hyung Lee, Hyoung Won Bae, Gong Je Seong, Chan Yun Kim
OBJECTIVE: Systemic vascular dysfunction has been suggested to contribute to glaucomatous damage. Albuminuria is a surrogate marker of endothelial injury, including vessels. However, their relationship is not well understood. This study aimed to investigate the association between albuminuria and the prevalence of open-angle glaucoma (OAG) in nondiabetic subjects. METHODS: We conducted a cross-sectional study of 4186 nondiabetic participants aged 19 years or older from the 2011-2012 Korea National Health and Nutrition Examination Survey...
2016: PloS One
https://www.readbyqxmd.com/read/27987089/national-survey-of-pediatric-hospitalizations-due-to-kawasaki-disease-and-coronary-artery-aneurysms-in-the-usa
#13
Yusuke Okubo, Kotaro Nochioka, Hiroshi Sakakibara, Marcia Testa, Robert P Sundel
Several studies revealed the epidemiology of Kawasaki disease-related hospitalizations among children in the USA and other countries. However, disparities of developing coronary artery aneurysms by race/ethnicity, patient socioeconomic status, and geographic locations remain unknown in the USA. Hospital discharge record data of patients with Kawasaki disease aged 19 years or younger were obtained from the 2003, 2006, 2009, and 2012 Kid's Inpatient Database. The data were weighted to estimate the annual hospitalization rates with respect to age, gender, and race/ethnicity in the USA...
December 16, 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/27977410/how-serious-are-health-impacts-in-one-of-the-most-polluted-regions-of-central-europe
#14
Vítězslav Jiřík, Andrea Dalecká, Veronika Vašendová, Jana Janoutová, Vladimír Janout
BACKGROUND: The long-term exposure to pollutants in ambient air is associated with higher mortality and occurrence of respiratory and cardiopulmonary diseases. The longitudinal cross-section study focuses on the associations between long-term exposures to carcinogenic and non-carcinogenic pollutants and the prevalence and incidence of such specific diseases including immunodeficiencies. METHODS: The data on health status from industrial and non-industrial regions were obtained from health documentation for a 5-year period from 2007 to 2011 and represent the whole population living in polluted (1,249,323 inhabitants) and unpolluted (631,387 inhabitants) regions...
December 15, 2016: Reviews on Environmental Health
https://www.readbyqxmd.com/read/27957773/dental-workforce-availability-and-dental-services-utilization-in-appalachia-a-geospatial-analysis
#15
Xue Feng, Usha Sambamoorthi, R Constance Wiener
OBJECTIVES: There is considerable variation in dental services utilization across Appalachian counties, and a plausible explanation is that individuals in some geographical areas do not utilize dental care due to dental workforce shortage. We conducted an ecological study on dental workforce availability and dental services utilization in Appalachia. METHODS: We derived county-level (n = 364) data on demographic and socioeconomic characteristics and dental services utilization in Appalachia from the 2010 Behavioral Risk Factor Surveillance System (BRFSS) using person-level data...
December 13, 2016: Community Dentistry and Oral Epidemiology
https://www.readbyqxmd.com/read/27941628/ground-level-pm2-5-estimates-over-china-using-satellite-based-geographically-weighted-regression-gwr-models-are-improved-by-including-no%C3%A2-and-enhanced-vegetation-index-evi
#16
Tianhao Zhang, Wei Gong, Wei Wang, Yuxi Ji, Zhongmin Zhu, Yusi Huang
Highly accurate data on the spatial distribution of ambient fine particulate matter (<2.5 μm: PM2.5) is currently quite limited in China. By introducing NO₂ and Enhanced Vegetation Index (EVI) into the Geographically Weighted Regression (GWR) model, a newly developed GWR model combined with a fused Aerosol Optical Depth (AOD) product and meteorological parameters could explain approximately 87% of the variability in the corresponding PM2.5 mass concentrations. There existed obvious increase in the estimation accuracy against the original GWR model without NO₂ and EVI, where cross-validation R² increased from 0...
December 7, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27920973/consumption-of-caffeinated-energy-drinks-among-youth-and-young-adults-in-canada
#17
Jessica L Reid, Cassondra McCrory, Christine M White, Chantal Martineau, Pat Vanderkooy, Nancy Fenton, David Hammond
The growing market for caffeinated energy drinks (CEDs) has caused concern about excessive caffeine intake and potential adverse effects, particularly among young people. The current study examined patterns of CED consumption among youth and young adults in Canada, using data from a national online survey conducted in October 2014. Data from a non-probability sample of 2040 respondents aged 12-24 from a consumer panel was weighted to national proportions; measures of CED consumption were estimated, including prevalence, excessive daily consumption, and context for use (locations and reasons)...
March 2017: Preventive Medicine Reports
https://www.readbyqxmd.com/read/27905980/temporal-evolution-of-the-risk-factors-associated-with-low-birth-weight-rates-in-brazilian-capitals-1996-2011
#18
Viviane Costa de Souza Buriol, Vânia Hirakata, Marcelo Zubaran Goldani, Clécio Homrich da Silva
OBJECTIVE: To analyze the trend of low birth weight (LBW) and its determinants in Brazilian state capitals between 1996 and 2011. We intended to determine which variables are associated with LBW during the period studied. METHODS: This is a cross-sectional study that used data from the National Information System of Live Births from 26 state capitals and Brasilia (the federal capital), divided into five geographical regions. The Average Annual Percentage of Change (AAPC) was used to assess the possible time trend in the low birth weight rates for considering all regions together and each region separately, according to each variable, and the Poisson regression was calculated in order to demonstrate time trends in low birth weight and the impact of variables (age and educational maternal level, antenatal visits, type of delivery, and gestational age) during the period...
May 3, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27903062/geographically-weighted-regression-for-modelling-the-accessibility-to-the-public-hospital-network-in-concepci%C3%A3-n-metropolitan-area-chile
#19
Marcela Martínez Bascuñán, Carolina Rojas Quezada
Accessibility models in transport geography based on geographic information systems have proven to be an effective method in determining spatial inequalities associated with public health. This work aims to model the spatial accessibility from populated areas within the Concepción metropolitan area (CMA), the second largest city in Chile. The city's public hospital network is taken into consideration with special reference to socio-regional inequalities. The use of geographically weighted regression (GWR) and ordinary least squares (OLS) for modelling accessibility with socioeconomic and transport variables is proposed...
November 22, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27903052/assessing-spatial-inequalities-in-accessing-community-pharmacies-a-mixed-geographically-weighted-approach
#20
Alexander Domnich, Lucia Arata, Daniela Amicizia, Alessio Signori, Roberto Gasparini, Donatella Panatto
Geographical accessibility is an important determinant for the utilisation of community pharmacies. The present study explored patterns of spatial accessibility with respect to pharmacies in Liguria, Italy, a region with particular geographical and demographic features. Municipal density of pharmacies was proxied as the number of pharmacies per capita and per km2, and spatial autocorrelation analysis was performed to identify spatial clusters. Both non-spatial and spatial models were constructed to predict the study outcome...
November 16, 2016: Geospatial Health
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