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Geographically weighted regression

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https://www.readbyqxmd.com/read/28531796/spatially-explicit-modeling-of-multi-scale-drivers-of-aboveground-forest-biomass-and-water-yield-in-watersheds-of-the-southeastern-united-states
#1
Mukhtar Ahmed Ajaz Ahmed, Amr Abd-Elrahman, Francisco J Escobedo, Wendell P Cropper, Timothy A Martin, Nilesh Timilsina
Understanding ecosystem processes and the influence of regional scale drivers can provide useful information for managing forest ecosystems. Examining more local scale drivers of forest biomass and water yield can also provide insights for identifying and better understanding the effects of climate change and management on forests. We used diverse multi-scale datasets, functional models and Geographically Weighted Regression (GWR) to model ecosystem processes at the watershed scale and to interpret the influence of ecological drivers across the Southeastern United States (SE US)...
May 19, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28522219/racial-variation-in-semen-quality-at-fertility-evaluation
#2
Yash S Khandwala, Chiyuan A Zhang, Shufeng Li, Barry Behr, David Guo, Michael L Eisenberg
OBJECTIVE: To identify racial differences in semen quality among men living in the same geographic area seeking fertility evaluation. METHODS: Men obtaining a semen analysis for infertility evaluation or treatment between 2012 and 2016 at a single center were identified and demographic data including height, weight, BMI and age were described. Mean semen parameters and the proportions of men with suboptimal parameters based on the WHO 5(th) edition criteria were also compared based on race...
May 15, 2017: Urology
https://www.readbyqxmd.com/read/28493598/bystander-cpr-is-clustered-and-associated-with-neighborhood-socioeconomic-characteristics-a-geospatial-analysis-of-kent-county-michigan
#3
Amy Uber, Richard C Sadler, Todd Chassee, Joshua C Reynolds
OBJECTIVES: Geographic clustering of bystander CPR is associated with demographic and socioeconomic features of the community where out-of-hospital cardiac arrest (OHCA) occurred, though this association remains largely untested in rural areas. With a significant rural component and relative racial homogeneity, Kent County, Michigan provides a unique setting to externally validate or identify new community features associated with bystander CPR. Using a large, countywide dataset, we tested for geographic clustering of bystander CPR, and its associations with community socioeconomic features...
May 11, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/28489042/spatial-analysis-of-ambient-pm2-5-exposure-and-bladder-cancer-mortality-in-taiwan
#4
Hsin-Ling Yeh, Shang-Wei Hsu, Yu-Chia Chang, Ta-Chien Chan, Hui-Chen Tsou, Yen-Chen Chang, Po-Huang Chiang
Fine particulate matter (PM2.5) is an air pollutant that is receiving intense regulatory attention in Taiwan. In previous studies, the effect of air pollution on bladder cancer has been explored. This study was conducted to elucidate the effect of atmospheric PM2.5 and other local risk factors on bladder cancer mortality based on available 13-year mortality data. Geographically weighted regression (GWR) was applied to estimate and interpret the spatial variability of the relationships between bladder cancer mortality and ambient PM2...
May 10, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28486357/inpatient-postpartum-long-acting-reversible-contraception-and-sterilization-in-the-united-states-2008-2013
#5
Michelle H Moniz, Tammy Chang, Michele Heisler, Lindsay Admon, Acham Gebremariam, Vanessa K Dalton, Matthew M Davis
OBJECTIVE: To measure rates of long-acting reversible contraception (LARC), including intrauterine devices and contraceptive implants, and tubal sterilization during delivery hospitalizations and correlates of their use. METHODS: This retrospective cohort study used the 2008-2013 National Inpatient Sample, a publicly available all-payer database. We identified delivery hospitalizations with the International Classification of Diseases, 9th Revision, Clinical Modification codes for intrauterine device insertion, contraceptive implant insertion, and tubal sterilization...
May 5, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28484861/sex-life-satisfaction-in-sub-saharan-africa-a-descriptive-and-exploratory-analysis
#6
Stephen Cranney
Nearly all of the sex life satisfaction literature has dealt with developed-country settings, and nothing has been published on sex life satisfaction in sub-Saharan Africa. Not only is sub-Saharan African a substantively relevant area in its own right, but it also provides a useful point of comparison for patterns and relations found in developed-world contexts. A brief descriptive and exploratory study of sex life satisfaction in sub-Saharan Africa was conducted using the World Gallup Poll, a dataset with representative sex life satisfaction data for 31 countries and 25,483 cases...
May 8, 2017: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/28483064/missed-opportunities-for-hepatitis-a-vaccination-national-immunization-survey-child-2013
#7
Shannon M Casillas, Robert A Bednarczyk
OBJECTIVES: To quantify the number of missed opportunities for vaccination with hepatitis A vaccine in children and assess the association of missed opportunities for hepatitis A vaccination with covariates of interest. STUDY DESIGN: Weighted data from the 2013 National Immunization Survey of US children aged 19-35 months were used. Analysis was restricted to children with provider-verified vaccination history (n = 13 460). Missed opportunities for vaccination were quantified by determining the number of medical visits a child made when another vaccine was administered during eligibility for hepatitis A vaccine, but hepatitis A vaccine was not administered...
May 5, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28478789/spatial-distribution-of-mumps-in-south-korea-2001-2015-identifying-clusters-and-population-risk-factors
#8
Y-J Choe, K Min, S-I Cho
In South Korea, the resurgence of mumps was noted primarily among school-aged children and adolescents since 2000. We analyzed spatial patterns in mumps incidence to give an indication to the geographical risk. We used National Notifiable Disease Surveillance System data from 2001 to 2015, classifying into three periods according to the level of endemicity. A geographic-weighted regression analysis was performed to find demographic predictors of mumps incidence according to district level. We assessed the association between the total population size, population density, percentage of children (age 0-19 years), timely vaccination rate of measles-mumps-rubella vaccines and the higher incidence rate of mumps...
May 8, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28454881/prevalence-of-leishmania-species-in-rodents-a-systematic-review-and-meta-analysis-in-iran
#9
REVIEW
Masoud Foroutan, Shahram Khademvatan, Hamidreza Majidiani, Hamidreza Khalkhali, Faezeh Hedayati-Rad, Shahla Khashaveh, Habib Mohammadzadeh
Leishmaniasis are diverse group of diseases caused by numerous species of genus Leishmania. Herein we have contrived a systematic review and meta-analysis on the prevalence of Leishmania species in rodents of Iran. For this purpose, following the general methodology recommended for systematic reviews and meta-analysis, six English databases (PubMed, Science Direct, Scopus, Ovid, Web of Science and Google Scholar) and four Persian databases (Magiran, SID, Iran Doc and Iran Medex) were explored during January 1995 till June 2015...
April 25, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28444001/birth-weight-and-risk-of-childhood-solid-tumors-in-brazil-a-record-linkage-between-population-based-data-sets
#10
Neimar de Paula Silva, Rejane de Souza Reis, Rafael Garcia Cunha, Julio Fernando Oliveira, Fernanda Cristina da Silva de Lima, Maria Socorro Pombo-de-Oliveira, Marceli Oliveira Santos, Beatriz de Camargo
Objective: To analyze the relationship between the development of childhood solid tumors and 1) birth weight and 2) fetal growth, using two Brazilian population-based data sets. Methods: A case-cohort study was performed using two population-based data sets, and linkage between the Live Birth Information System (Sistema de Informação sobre Nascidos Vivos, SINASC) and 14 population-based cancer registries (PBCRs) was established. Four controls per case were chosen randomly from the SINASC data set...
April 20, 2017: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28441467/distribution-of-mammal-functional-diversity-in-the-neotropical-realm-influence-of-land-use-and-extinction-risk
#11
José F González-Maya, Enrique Martínez-Meyer, Rodrigo Medellín, Gerardo Ceballos
Functional diversity represents a measure of diversity that incorporates the role of species in an ecosystem, and therefore its dynamics and resilience. Assessing its drivers and spatial variation represents an important step forward in our understanding of functional ecosystem dynamics and it is also necessary to achieve a comprehensive conservation planning. In this paper, we assessed mammal functional diversity for the 218 ecoregions within the Neotropical realm. We evaluated the overall influence and spatial variation of species richness, ecoregion extent, intervention and species at risk on functional diversity...
2017: PloS One
https://www.readbyqxmd.com/read/28427355/identifying-and-characterizing-hepatitis-c-virus-hotspots-in-massachusetts-a-spatial-epidemiological-approach
#12
Thomas J Stopka, Michael A Goulart, David J Meyers, Marga Hutcheson, Kerri Barton, Shauna Onofrey, Daniel Church, Ashley Donahue, Kenneth K H Chui
BACKGROUND: Hepatitis C virus (HCV) infections have increased during the past decade but little is known about geographic clustering patterns. METHODS: We used a unique analytical approach, combining geographic information systems (GIS), spatial epidemiology, and statistical modeling to identify and characterize HCV hotspots, statistically significant clusters of census tracts with elevated HCV counts and rates. We compiled sociodemographic and HCV surveillance data (n = 99,780 cases) for Massachusetts census tracts (n = 1464) from 2002 to 2013...
April 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28425896/a-longitudinal-cohort-study-examining-determinants-of-overweight-and-obesity-in-adulthood
#13
Caroline Barakat-Haddad, Usman Saeed, Susan Elliott
OBJECTIVES: Adulthood overweight and obesity are multifaceted conditions influenced by a combination of biological, environmental and socio-cultural factors across the lifespan. Using a longitudinal study design, we aimed to identify determinants of adulthood overweight and obesity, in relation to: 1) childhood and life course factors, 2) geographical differences in air quality, and 3) gender-specific factors, in a cohort followed from childhood into adulthood. METHODS: Childhood data were acquired (1978-1986) from children residing in four distinct Hamilton neighbourhoods (Ontario, Canada), including air-quality assessments...
April 20, 2017: Canadian Journal of Public Health. Revue Canadienne de Santé Publique
https://www.readbyqxmd.com/read/28419683/geographical-differences-in-survival-of-dogs-with-non-hodgkin-lymphoma-treated-with-a-chop-based-chemotherapy-protocol
#14
H Wilson-Robles, C M Budke, T Miller, N Dervisis, A Novosad, Z Wright, D H Thamm, K Vickery, K Burgess, M Childress, J Lori, C Saba, S Rau, M Silver, G Post, K Reeds, S Gillings, S Schleis, T Stein, B Brugmann, C DeRegis, O Smrkovski, J Lawrence, T Laver
BACKGROUND: In humans geographical differences in the incidence and presentation of various cancers have been reported. However, much of this information has not been collected in veterinary oncology. AIM: The purpose of this study was to determine if a geographic difference in progression free survival exists for dogs with lymphoma treated within the US. MATERIALS AND METHODS: Medical records of 775 cases of canine lymphoma from 3 US regions (west, south and north), treated with CHOP chemotherapy, were retrospectively evaluated...
April 17, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28415846/is-urban-rural-location-associated-with-weight-status-in-school-children-an-examination-of-42-small-and-rural-californian-counties
#15
Ron Strochlic, Lauren E Au, Lorrene Ritchie
INTRODUCTON: Studies have identified geographic variation in overweight and obesity rates among children, with higher rates of overweight and obesity often found among children living in rural compared to urban areas. A small number of studies have explored differences in overweight and obesity based on more nuanced gradations along the urban-rural continuum. The purpose of the present study was to identify differences in overweight and obesity based on gradations along the urban-rural continuum among children in 42 Californian counties with populations less than 500 000...
April 2017: Rural and Remote Health
https://www.readbyqxmd.com/read/28403888/the-relationship-between-ethnic-composition-of-the-residential-environment-and-self-reported-health-among-turks-and-moroccans-in-amsterdam
#16
Eleonore M Veldhuizen, Umar Z Ikram, Sjoerd de Vos, Anton E Kunst
BACKGROUND: Previous studies from the US and UK suggest that neighbourhood ethnic composition is associated with health, positive or negative, depending on the health outcome and ethnic group. We examined the association between neighbourhood ethnic composition and self-reported health in these groups in Amsterdam, and we aimed to explore whether there is spatial variation in this association. METHODS: We used micro-scale data to describe the ethnic composition in buffers around the home location of 2701 Turks and 2661 Moroccans...
April 12, 2017: International Journal of Health Geographics
https://www.readbyqxmd.com/read/28397745/modeling-fire-occurrence-at-the-city-scale-a-comparison-between-geographically-weighted-regression-and-global-linear-regression
#17
Chao Song, Mei-Po Kwan, Jiping Zhu
An increasing number of fires are occurring with the rapid development of cities, resulting in increased risk for human beings and the environment. This study compares geographically weighted regression-based models, including geographically weighted regression (GWR) and geographically and temporally weighted regression (GTWR), which integrates spatial and temporal effects and global linear regression models (LM) for modeling fire risk at the city scale. The results show that the road density and the spatial distribution of enterprises have the strongest influences on fire risk, which implies that we should focus on areas where roads and enterprises are densely clustered...
April 8, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28391146/a-new-approach-to-spatial-identification-of-potential-health-hazards-associated-with-childhood-asthma
#18
Alina Svechkina, Boris A Portnov
RESEARCH BACKGROUND: Childhood asthma is a chronic disease, known to be linked to prolonged exposure to air pollution. However, the identification of specific health hazards, associated with childhood asthma is not always straightforward, due to the presence of multiple sources of air pollution in urban areas. In this study, we test a novel approach to the spatial identification of environmental hazards that have the highest probability of association with the observed asthma morbidity patterns...
October 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28373741/climatic-conditions-and-human-mortality-spatial-and-regional-variation-in-the-united-states
#19
Tse-Chuan Yang, Leif Jensen
Previous research on climatic conditions and human mortality in the United States has three gaps: largely ignoring social conditions, lack of nationwide focus, and overlooking potential spatial variations. Our goal is to understand whether climatic conditions contribute to mortality after considering social conditions and to investigate whether spatial non-stationarity exists in these factors. Applying geographically weighted regression to a unique nationwide county-level dataset, we found that (1) net of other factors, average July temperatures are positively (detrimentally) associated with mortality while January temperatures mainly have a curvilinear relationship, (2) the mortality-climatic condition associations are spatially non-stationary, (3) the relationships between social conditions (e...
March 2017: Population and Environment
https://www.readbyqxmd.com/read/28367364/a-comparison-of-least-squares-regression-and-geographically-weighted-regression-modeling-of-west-nile-virus-risk-based-on-environmental-parameters
#20
Abhishek K Kala, Chetan Tiwari, Armin R Mikler, Samuel F Atkinson
BACKGROUND: The primary aim of the study reported here was to determine the effectiveness of utilizing local spatial variations in environmental data to uncover the statistical relationships between West Nile Virus (WNV) risk and environmental factors. Because least squares regression methods do not account for spatial autocorrelation and non-stationarity of the type of spatial data analyzed for studies that explore the relationship between WNV and environmental determinants, we hypothesized that a geographically weighted regression model would help us better understand how environmental factors are related to WNV risk patterns without the confounding effects of spatial non-stationarity...
2017: PeerJ
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