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Geographically weighted regression

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https://www.readbyqxmd.com/read/27905980/temporal-evolution-of-the-risk-factors-associated-with-low-birth-weight-rates-in-brazilian-capitals-1996-2011
#1
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
#2
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
#3
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
https://www.readbyqxmd.com/read/27881079/detection-of-west-nile-virus-in-wild-birds-in-tana-river-and-garissa-counties-kenya
#4
Doris Nyamwaya, Virginia Wang'ondu, Joshua Amimo, George Michuki, Moses Ogugo, Enoch Ontiri, Rosemary Sang, Johanna Lindahl, Delia Grace, Bernard Bett
BACKGROUND: West Nile fever virus is a zoonotic arboviral infection maintained in a sylvatic cycle involving mosquito vectors and birds. It is one the arboviruses whose geographical range is expanding because of climate and land use changes that enhance the densities of mosquitoes and promote mosquito-bird-human interactions. We carried out a survey to determine the reservoirs of WNV among wild birds in Tana River and Garissa counties, Kenya. METHODS: Blood samples were obtained from 361 randomly trapped wild birds...
November 23, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27878838/cluster-detection-of-spatial-regression-coefficients
#5
Junho Lee, Ronald E Gangnon, Jun Zhu
Popular approaches to spatial cluster detection, such as the spatial scan statistic, are defined in terms of the responses. Here, we consider a varying-coefficient regression and spatial clusters in the regression coefficients. For varying-coefficient regression, such as the geographically weighted regression, different regression coefficients are obtained for different spatial units. It is often of interest to the practitioners to identify clusters of spatial units with distinct patterns in a regression coefficient, but there is no formal statistical methodology for that...
November 22, 2016: Statistics in Medicine
https://www.readbyqxmd.com/read/27872085/population-health-needs-as-predictors-of-variations-in-nhs-practice-payments-a-cross-sectional-study-of-english-general-practices-in-2013-2014-and-2014-2015
#6
Louis S Levene, Richard Baker, Andrew Wilson, Nicola Walker, Kambiz Boomla, M John G Bankart
BACKGROUND: NHS general practice payments in England include pay for performance elements and a weighted component designed to compensate for workload, but without measures of specific deprivation or ethnic groups. AIM: To determine whether population factors related to health needs predicted variations in NHS payments to individual general practices in England. DESIGN AND SETTING: Cross-sectional study of all practices in England, in financial years 2013-2014 and 2014-2015...
November 21, 2016: British Journal of General Practice: the Journal of the Royal College of General Practitioners
https://www.readbyqxmd.com/read/27871303/geographically-weighted-regression-of-knowledge-and-behaviour-determinants-to-anti-malarial-recommending-and-dispensing-practice-among-medicine-retailers-in-western-kenya-capacitating-targeted-interventions
#7
Andria Rusk, Linda Highfield, J Michael Wilkerson, Melissa Harrell, Andrew Obala, Benjamin Amick
BACKGROUND: Most patients with malaria seek treatment first in retail drug shops. Myriad studies have examined retailer behaviours and characteristics to understand the determinants to these behaviours. Geospatial methods are helpful in discovering if geographic location plays a role in the relationship between determinants and outcomes. This study aimed to discover if spatial autocorrelation exists in the relationship between determinants and retailer behaviours, and to provide specific geographic locations and target behaviours for tailoring future interventions...
November 21, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27864357/global-region-of-birth-is-an-independent-risk-factor-for-type-2-diabetes-in-stockholm-sweden
#8
Liselotte Schäfer Elinder, Shawn Hakimi, Anton Lager, Emma Patterson
BACKGROUND: In Stockholm, type 2 diabetes (T2D) is a public health concern and much more prevalent in areas with a high proportion of foreign-born individuals. One in five individuals in Stockholm County are born outside of Sweden, and we therefore investigated if global region of birth was associated with diabetes risk, adjusting for established risk factors. METHODS: Cross-sectional data from the population-based Stockholm Public Health Survey 2010 (N = 69 115) was combined with registry-based information on country of birth grouped into eight global geographical regions...
November 17, 2016: European Journal of Public Health
https://www.readbyqxmd.com/read/27853179/spatial-analysis-of-pahs-in-soils-along-an-urban-suburban-rural-gradient-scale-effect-distribution-patterns-diffusion-and-influencing-factors
#9
Chi Peng, Meie Wang, Weiping Chen
Spatial statistical methods including Cokriging interpolation, Morans I analysis, and geographically weighted regression (GWR) were used for studying the spatial characteristics of polycyclic aromatic hydrocarbon (PAH) accumulation in urban, suburban, and rural soils of Beijing. The concentrations of PAHs decreased spatially as the level of urbanization decreased. Generally, PAHs in soil showed two spatial patterns on the regional scale: (1) regional baseline depositions with a radius of 16.5 km related to the level of urbanization and (2) isolated pockets of soil contaminated with PAHs were found up to around 3...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27852605/the-local-food-environment-and-fruit-and-vegetable-intake-a-geographically-weighted-regression-approach-in-the-oriel-study
#10
Christelle Clary, Daniel J Lewis, Ellen Flint, Neil R Smith, Yan Kestens, Steven Cummins
Studies that explore associations between the local food environment and diet routinely use global regression models, which assume that relationships are invariant across space, yet such stationarity assumptions have been little tested. We used global and geographically weighted regression models to explore associations between the residential food environment and fruit and vegetable intake. Analyses were performed in 4 boroughs of London, United Kingdom, using data collected between April 2012 and July 2012 from 969 adults in the Olympic Regeneration in East London Study...
November 16, 2016: American Journal of Epidemiology
https://www.readbyqxmd.com/read/27845737/spatial-analysis-of-severe-fever-with-thrombocytopenia-syndrome-virus-in-china-using-a-geographically-weighted-logistic-regression-model
#11
Liang Wu, Fei Deng, Zhong Xie, Sheng Hu, Shu Shen, Junming Shi, Dan Liu
Severe fever with thrombocytopenia syndrome (SFTS) is caused by severe fever with thrombocytopenia syndrome virus (SFTSV), which has had a serious impact on public health in parts of Asia. There is no specific antiviral drug or vaccine for SFTSV and, therefore, it is important to determine the factors that influence the occurrence of SFTSV infections. This study aimed to explore the spatial associations between SFTSV infections and several potential determinants, and to predict the high-risk areas in mainland China...
November 11, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27837284/forest-dynamics-to-precipitation-and-temperature-in-the-gulf-of-mexico-coastal-region
#12
Tianyu Li, Qingmin Meng
The forest is one of the most significant components of the Gulf of Mexico (GOM) coast. It provides livelihood to inhabitant and is known to be sensitive to climatic fluctuations. This study focuses on examining the impacts of temperature and precipitation variations on coastal forest. Two different regression methods, ordinary least squares (OLS) and geographically weighted regression (GWR), were employed to reveal the relationship between meteorological variables and forest dynamics. OLS regression analysis shows that changes in precipitation and temperature, over a span of 12 months, are responsible for 56% of NDVI variation...
November 12, 2016: International Journal of Biometeorology
https://www.readbyqxmd.com/read/27835033/travel-distance-to-prenatal-care-and-high-blood-pressure-during-pregnancy
#13
Lu Shi, Kara E MacLeod, Donglan Zhang, Fan Wang, Margaret Shin Chao
OBJECTIVE: To assess whether poor geographic accessibility to prenatal care, as indicated by long distance trips to prenatal care, produced high blood pressure (HPB) during pregnancy. METHODS: Using the 2007 Los Angeles Mommy and Baby Study for women without hypertension prior to pregnancy (n = 3405), we compared self-reported HBP by travel distance to prenatal care controlling for age, race/ethnicity, marital status, education, household income, weight status, and physical activity...
November 11, 2016: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/27829399/role-of-aedes-aegypti-linnaeus-and-aedes-albopictus-skuse-in-local-dengue-epidemics-in-taiwan
#14
Pui-Jen Tsai, Hwa-Jen Teng
BACKGROUND: Aedes mosquitoes in Taiwan mainly comprise Aedes albopictus and Ae. aegypti. However, the species contributing to autochthonous dengue spread and the extent at which it occurs remain unclear. Thus, in this study, we spatially analyzed real data to determine spatial features related to local dengue incidence and mosquito density, particularly that of Ae. albopictus and Ae. aegypti. METHODS: We used bivariate Moran's I statistic and geographically weighted regression (GWR) spatial methods to analyze the globally spatial dependence and locally regressed relationship between (1) imported dengue incidences and Breteau indices (BIs) of Ae...
November 9, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27829033/outcomes-of-nigeria-s-hiv-aids-treatment-program-for-patients-initiated-on-antiretroviral-treatment-between-2004-2012
#15
Ibrahim Dalhatu, Dennis Onotu, Solomon Odafe, Oseni Abiri, Henry Debem, Simon Agolory, Ray W Shiraishi, Andrew F Auld, Mahesh Swaminathan, Kainne Dokubo, Evelyn Ngige, Chukwuemeka Asadu, Emmanuel Abatta, Tedd V Ellerbrock
BACKGROUND: The Nigerian Antiretroviral therapy (ART) program started in 2004 and now ranks among the largest in Africa. However, nationally representative data on outcomes have not been reported. METHODS: We evaluated retrospective cohort data from a nationally representative sample of adults aged ≥15 years who initiated ART during 2004 to 2012. Data were abstracted from 3,496 patient records at 35 sites selected using probability-proportional-to-size (PPS) sampling...
2016: PloS One
https://www.readbyqxmd.com/read/27825351/determining-the-spatial-heterogeneity-underlying-racial-and-ethnic-differences-in-timely-mammography-screening
#16
Joseph Gibbons, Melody K Schiaffino
BACKGROUND: The leading cause of cancer death for women worldwide continues to be breast cancer. Early detection through timely mammography has been recognized to increase the probability of survival. While mammography rates have risen for many women in recent years, disparities in screening along racial/ethnic lines persist across nations. In this paper, we argue that the role of local context, as identified through spatial heterogeneity, is an unexplored dynamic which explains some of the gaps in mammography utilization by race/ethnicity...
November 8, 2016: International Journal of Health Geographics
https://www.readbyqxmd.com/read/27820938/prevalence-and-symptomatic-burden-of-diagnosed-endometriosis-in-the-united-states-national-estimates-from-a-cross-sectional-survey-of-59-411-women
#17
Mahesh J Fuldeore, Ahmed M Soliman
BACKGROUND/AIMS: To estimate the prevalence of diagnosed endometriosis (DE) in women in the United States and assess the associated symptomatic burden. METHODS: An online, cross-sectional survey of women aged 18-49 years was conducted from August 6, 2012, through November 14, 2012. Survey data (weighted by age, race, education, income, geographical distribution, and propensity score) were used to estimate the prevalence and symptomatic burden of DE in women in the United States...
November 8, 2016: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/27814454/spousal-violence-and-receipt-of-skilled-maternity-care-during-and-after-pregnancy-in-nepal
#18
Marie Furuta, Debra Bick, Hiromi Matsufuji, Kirstie Coxon
OBJECTIVES: a substantial number of Nepali women experience spousal violence, which affects their health in many ways, including during and after pregnancy. This study aimed to examine associations between women's experiences of spousal violence and their receipt of skilled maternity care, using two indicators: (1) receiving skilled maternity care across a continuum from pregnancy to the early postnatal period and (2) receiving any skilled maternity care in pregnancy, childbirth, or postpartum...
October 19, 2016: Midwifery
https://www.readbyqxmd.com/read/27809861/do-the-risk-factors-for-type-2-diabetes-mellitus-vary-by-location-a-spatial-analysis-of-health-insurance-claims-in-northeastern-germany-using-kernel-density-estimation-and-geographically-weighted-regression
#19
Boris Kauhl, Jürgen Schweikart, Thomas Krafft, Andrea Keste, Marita Moskwyn
BACKGROUND: The provision of general practitioners (GPs) in Germany still relies mainly on the ratio of inhabitants to GPs at relatively large scales and barely accounts for an increased prevalence of chronic diseases among the elderly and socially underprivileged populations. Type 2 Diabetes Mellitus (T2DM) is one of the major cost-intensive diseases with high rates of potentially preventable complications. Provision of healthcare and access to preventive measures is necessary to reduce the burden of T2DM...
November 3, 2016: International Journal of Health Geographics
https://www.readbyqxmd.com/read/27801870/construction-of-a-seasonal-difference-geographically-and-temporally-weighted-regression-sd-gtwr-model-and-comparative-analysis-with-gwr-based-models-for-hemorrhagic-fever-with-renal-syndrome-hfrs-in-hubei-province-china
#20
Liang Ge, Youlin Zhao, Zhongjie Sheng, Ning Wang, Kui Zhou, Xiangming Mu, Liqiang Guo, Teng Wang, Zhanqiu Yang, Xixiang Huo
Hemorrhagic fever with renal syndrome (HFRS) is considered a globally distributed infectious disease which results in many deaths annually in Hubei Province, China. In order to conduct a better analysis and accurately predict HFRS incidence in Hubei Province, a new model named Seasonal Difference-Geographically and Temporally Weighted Regression (SD-GTWR) was constructed. The SD-GTWR model, which integrates the analysis and relationship of seasonal difference, spatial and temporal characteristics of HFRS (HFRS was characterized by spatiotemporal heterogeneity and it is seasonally distributed), was designed to illustrate the latent relationships between the spatio-temporal pattern of the HFRS epidemic and its influencing factors...
October 29, 2016: International Journal of Environmental Research and Public Health
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