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Geographically weighted regression

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https://www.readbyqxmd.com/read/28225805/prevalence-and-risk-factors-of-chlamydia-infection-in-hong-kong-a-population-based-geospatial-household-survey-and-testing
#1
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
#2
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...
February 14, 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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
https://www.readbyqxmd.com/read/28109070/peste-des-petits-ruminants-risk-factors-and-space-time-clusters-in-mymensingh-bangladesh
#10
M S Rony, A K M A Rahman, M M Alam, N Dhand, M P Ward
Using a hospital-based case-control study design, our aim was to identify risk factors for-and space-time clusters of-Peste des Petits Ruminants (PPR) in Mymensingh, Bangladesh. Three hundred and eighty PPR cases diagnosed between January 2005 and December 2014 at the Bangladesh Agricultural University Veterinary Teaching Hospital (BAUVTH) were selected; three controls per case from BAUVTH were then selected (n = 1,048). From records, data extracted included information on date of report, location, age, breed, sex and body weight of goats...
January 21, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28103842/one-size-doesn-t-fit-all-cross-sectional-associations-between-neighborhood-walkability-crime-and-physical-activity-depends-on-age-and-sex-of-residents
#11
Andrea S Richardson, Wendy M Troxel, Madhumita B Ghosh-Dastidar, Robin Beckman, Gerald P Hunter, Amy S DeSantis, Natalie Colabianchi, Tamara Dubowitz
BACKGROUND: Low-income African American adults are disproportionately affected by obesity and are also least likely to engage in recommended levels of physical activity (Flegal et al. JAMA 303(3):235-41, 2010; Tucker et al. Am J Prev Med 40(4):454-61, 2011). Moderate-to-vigorous physical activity (MVPA) is an important factor for weight management and control, as well as for reducing disease risk (Andersen et al. Lancet 368(9532):299-304, 2006; Boreham and Riddoch J Sports Sci 19(12):915-29, 2001; Carson et al...
January 19, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28103456/health-inequalities-in-diabetes-mellitus-and-hypertension-a-parish-level-study-in-the-northern-region-of-portugal
#12
Teresa Leao, Julian Perelman, Manuela Felício, Vasco Machado, Graça Lima
INTRODUCTION: Diabetes and hypertension are highly prevalent conditions in Portugal. Little is known about the geographical and social patterning of these diseases, which precludes the design of targeted health policies. This study aimed to measure the geographical and socioeconomic distribution of type 2 diabetes and hypertension prevalence in the population resident in the Northern region of Portugal, for the year 2013. MATERIAL AND METHODS: An ecological correlation study analyzed the 2,028 parishes of the region...
October 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28092058/sub-regional-assessment-of-hpv-vaccination-among-female-adolescents-in-the-intermountain-west-and-implications-for-intervention-opportunities
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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