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Geographically weighted regression

Yang Zhao, Xue Qing Zhang, Xiao Dong Bian
To investigate the early supplementary processes of fishre sources in the Bohai Sea, the geographically weighted regression (GWR) was introduced to the habitat suitability index (HSI) model. The Bohai Sea larval Japanese Halfbeak HSIGWR model was established with four environmental variables, including sea surface temperature (SST), sea surface salinity (SSS), water depth (DEP), and chlorophyll a concentration (Chl a). Results of the simulation showed that the four variables had different performances in August 2015...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Juan Pedro Arrebola, Argelia Castaño, Marta Esteban, Mónica Bartolomé, Beatriz Pérez-Gómez, Juan José Ramos
Diet is considered the main source of Persistent Organic Pollutant (POP) exposure in the general population, although there are still several gaps of knowledge regarding the differential contribution of main food groups. The aim of this study was to identify dietary patterns that contribute to human exposure to organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and Perfluoroalkyl Substances (PFASs). Study population (n=1880, 18-65years old) was recruited during 2009-2010 in all the main geographical areas of Spain...
April 5, 2018: Science of the Total Environment
Ivaneliza Simionato de Assis, Marcos Augusto Moraes Arcoverde, Antônio Carlos Viera Ramos, Luana Seles Alves, Thais Zamboni Berra, Luiz Henrique Arroyo, Ana Angélica Rêgo de Queiroz, Danielle Talita Dos Santos, Aylana de Souza Belchior, Josilene Dália Alves, Flávia Meneguetti Pieri, Reinaldo Antônio Silva-Sobrinho, Ione Carvalho Pinto, Clodis Maria Tavares, Mellina Yamamura, Marco Andrey Cipriani Frade, Pedro Fredemir Palha, Francisco Chiaravalloti-Neto, Ricardo Alexandre Arcêncio
BACKGROUND: Brazil is the only country in Latin America that has adopted a national health system. This causes differences in access to health among Latin American countries and induces noticeable migration to Brazilian regions to seek healthcare. This phenomenon has led to difficulties in the control and elimination of diseases related to poverty, such as leprosy. The aim of this study was to evaluate social determinants and their relationship with the risk of leprosy, as well as to examine the temporal trend of its occurrence in a Brazilian municipality located on the tri-border area between Brazil, Paraguay and Argentina...
April 6, 2018: PLoS Neglected Tropical Diseases
Shyamala Ratnayeke, Frank T van Manen, Gopalasamy Reuben Clements, Noor Azleen Mohd Kulaimi, Stuart P Sharp
Mammalian carnivores play a vital role in ecosystem functioning. However, they are prone to extinction because of low population densities and growth rates, and high levels of persecution or exploitation. In tropical biodiversity hotspots such as Peninsular Malaysia, rapid conversion of natural habitats threatens the persistence of this vulnerable group of animals. Here, we carried out the first comprehensive literature review on 31 carnivore species reported to occur in Peninsular Malaysia and updated their probable distribution...
2018: PloS One
Hoehun Ha, Wei Tu
Suicide is a serious but preventable public health issue. Several previous studies have revealed a positive association between altitude and suicide rates at the county level in the contiguous United States. We assessed the association between suicide rates and altitude using a cross-county ecological study design. Data on suicide rates were obtained from a Web-based Injury Statistics Query and Reporting System (WISQARS), maintained by the U.S. National Center for Injury Prevention and Control (NCIPC). Altitude data were collected from the United States Geological Survey (USGS)...
April 4, 2018: International Journal of Environmental Research and Public Health
Donghui Wang, Guangqing Chi
Background: China has been characterized by persistently low fertility rates since the 1990s. Existing literature has examined the relationships of fertility levels with social, economic, and policy-related determinants. However, the possible spatial variations in these relationships have not been investigated. Objective: The purpose of this study is to examine the potential spatially varying relationships between county-level fertility rates and policy and socioeconomic factors in China...
July 2017: Demographic Research
Mohammad Javad Koohsari, Andrew T Kaczynski, Tomoya Hanibuchi, Ai Shibata, Kaori Ishii, Akitomo Yasunaga, Tomoki Nakaya, Koichiro Oka
Evidence about the impacts of the physical activity environment on adults' weight in the context of Asian countries is scarce. Likewise, no study exists in Asia examining whether Walk Score ® -a free online walkability tool-is related to obesity. This study aimed to examine associations between multiple physical activity environment measures and Walk Score ® ratings with Japanese adults' body mass index (BMI). Data from 1073 adults in the Healthy Built Environment in Japan study were used. In 2011, participants reported their height and weight...
March 26, 2018: International Journal of Environmental Research and Public Health
Xufeng Fei, Wanzhen Chen, Shuqing Zhang, Qingmin Liu, Zhonghao Zhang, Qing Pei
BACKGROUND: Incidences of thyroid cancer (TC) have been increasing worldwide in recent decades. In this research, we aimed to analyze the spatiotemporal pattern of TC and explore relevant environmental risk factors in Hangzhou (HZ), which is rapidly urbanizing and home to the highest TC incidence in China. METHODS: Spatial scan statistic was employed to analyze the spatiotemporal pattern of TC in HZ from 2008 to 2012. The geographically weighted regression model (GWR) was implemented to explore environmental risk factors...
March 3, 2018: Science of the Total Environment
Juan Carlos Herrera, Mariana Lira, Juliana Kain
INTRODUCTION: Although obesity is related to socioeconomic level, studies are inconclusive. OBJECTIVES: To determine obesity risk according to socioeconomic vulnerability among Chilean children (1st grade) in 2009 and 2013 and assess its change during that period, by sex and geographical area. PATIENTS AND METHOD: Cross-sectional study (N = 175,462 in 2009) and (N = 189,055 in 2013) which included: weight, height, rural / urban, gender and vulnerability obtained from JUNAEB's survey...
December 2017: Revista Chilena de Pediatría
Arran Hamlet, Kévin Jean, William Perea, Sergio Yactayo, Joseph Biey, Maria Van Kerkhove, Neil Ferguson, Tini Garske
BACKGROUND: Yellow fever virus (YFV) is a vector-borne flavivirus endemic to Africa and Latin America. Ninety per cent of the global burden occurs in Africa where it is primarily transmitted by Aedes spp, with Aedes aegypti the main vector for urban yellow fever (YF). Mosquito life cycle and viral replication in the mosquito are heavily dependent on climate, particularly temperature and rainfall. We aimed to assess whether seasonal variations in climatic factors are associated with the seasonality of YF reports...
March 2018: PLoS Neglected Tropical Diseases
Jeffrey W Jordan, Carolyn A Stalgaitis, John Charles, Patrick A Madden, Anjana G Radhakrishnan, Daniel Saggese
PURPOSE: Peer crowds are macro-level subcultures that share similarities across geographic areas. Over the past decade, dozens of studies have explored the association between adolescent peer crowds and risk behaviors, and how they can inform public health efforts. However, despite the interest, researchers have not yet reported on crowd size and risk levels from a representative sample, making it difficult for practitioners to apply peer crowd science to interventions. The current study reports findings from the first statewide representative sample of adolescent peer crowd identification and health behaviors...
February 1, 2018: Health Education & Behavior: the Official Publication of the Society for Public Health Education
Mohd Firdaus Mohd Radi, Jamal Hisham Hashim, Mohd Hasni Jaafar, Rozita Hod, Norfazilah Ahmad, Azmawati Binti Mohammed Nawi, Gul Muhammad Baloch, Rohaida Ismail, Nur Izzah Farakhin Ayub
Severe floods increase the risk of leptospirosis outbreaks in endemic areas. This study determines the spatial-temporal distribution of leptospirosis in relation to environmental factors after a major flooding event in Kelantan, Malaysia. We conducted a cross-sectional study involving incident leptospirosis cases, from the 3 months before, during, and three months after flood, in reference to the severe 2014 Kelantan flooding event. Geographical information system was used to determine the spatial distribution while climatic factors that influenced the cases were also analyzed...
March 12, 2018: American Journal of Tropical Medicine and Hygiene
Yu Shi, Danqing Hu, Erin L Rodgers, Slavica K Katusic, Stephen J Gleich, Andrew C Hanson, Darrell R Schroeder, Randall P Flick, David O Warner
BACKGROUND: Utilization of general anesthesia in children has important policy, economic, and healthcare delivery implications, yet there is little information regarding the epidemiology of these procedures in the United States. AIMS: The primary objective of this study was to describe in a geographically defined population the incidence of procedures requiring general anesthesia up to the child's third birthday, and the patient characteristics associated with receiving these procedures...
March 13, 2018: Paediatric Anaesthesia
David Weisburd, Breanne Cave, Matthew Nelson, Clair White, Amelia Haviland, Justin Ready, Brian Lawton, Kathleen Sikkema
This study explores the relationship between mental health and place at microgeographic units of analysis. We examine self-reported symptomology for depression and PTSD for 2,724 survey respondents interviewed in three types of randomly selected street segments: violent crime hot spots, cool spots, and cold spots. We find that the mean symptomology score is 61% higher for depression in violent crime hot spots than cold spots, and 85% higher for PTSD. Overall, we estimate that 14.8% of residents of violent crime hot spots meet thresholds for moderate depression or a diagnosis of PTSD...
March 7, 2018: American Journal of Community Psychology
E P Prokopakis, A Kaprana, A Karatzanis, G A Velegrakis, J Melissas, G Chalkiadakis
The mean gamma-ray distribution in Crete during the years after the nuclear accident at Chernobyl and its correlation with the Papillary Thyroid Cancer (PTC) distribution was identified. A total of 4285 patients underwent total thyroidectomy in our centre between 1990 and 2012. Data of gamma-ray (nSv/h) distribution were selected from the Greek Statistical Authorisation. A geo-spatial statistical model was used to estimate the expected number of patients with PTC and Kriging interpolation prediction model to estimate their distribution...
February 28, 2018: Acta Otorhinolaryngologica Italica
Fakhreddin Hajiloo, Saeid Hamzeh, Mahsa Gheysari
The PM2.5 as one of the main pollutants in Tehran city has a devastating effect on human health. Knowing the key parameters associated with PM2.5 concentration is essential to take effective actions to reduce the concentration of these particles. This study assesses the relationship between meteorological (humidity, pressure, temperature, precipitation, and wind speed) and environmental parameters (normalize difference vegetation index and land surface temperature of MODIS satellite data) on PM2.5 concentration in Tehran city...
March 1, 2018: Environmental Science and Pollution Research International
Drew A Helmer, Mazhgan Rowneki, Xue Feng, Chin-Lin Tseng, Danielle Rose, Orysya Soroka, Dennis Fried, Nisha Jani, Leonard M Pogach, Usha Sambamoorthi
Most Veterans who use the Veterans Health Administration (VHA) also utilize private-sector health care providers. To better inform local and regional health care planning, we assessed the association between reliance on VHA ambulatory care and total and system-specific preventable hospitalization rates (PHRs) at the state level. We conducted a retrospective dynamic cohort study using Veterans with diabetes mellitus, aged 66 years or older, and dually enrolled in VHA and Medicare parts A and B from 2004 to 2010...
January 2018: Inquiry: a Journal of Medical Care Organization, Provision and Financing
Yingqi Guo, Shu-Sen Chang, Feng Sha, Paul S F Yip
Previous investigations of geographic concentration of urban poverty indicate the contribution of a variety of factors, such as economic restructuring and class-based segregation, racial segregation, demographic structure, and public policy. However, the models used by most past research do not consider the possibility that poverty concentration may take different forms in different locations across a city, and most studies have been conducted in Western settings. We investigated the spatial patterning of neighborhood poverty and its correlates in Hong Kong, which is amongst cities with the highest GDP in the region, using the city-wide ordinary least square (OLS) regression model and the local-specific geographically weighted regression (GWR) model...
2018: PloS One
Kátia Biagio Fontes, Ana Carolina Jacinto Alarcão, Oscar Kenji Nihei, Sandra Marisa Pelloso, Luciano Andrade, Maria Dalva de Barros Carvalho
OBJECTIVE: Evaluate disparities in a Brazilian state by conducting an analysis to determine whether socioeconomic status was associated with the reported intimate partner sexual violence (IPSV) rates against women. DESIGN: A retrospective, ecological study. SETTINGS: Data retrieved from the Notifiable Diseases Information System database of the Ministry of Health of Brazil. PARTICIPANTS: All cases of IPSV (n=516) against women aged 15-49 years reported in the Notifiable Diseases Information System between 2009 and 2014...
February 20, 2018: BMJ Open
Hamzah Hasyim, Afi Nursafingi, Ubydul Haque, Doreen Montag, David A Groneberg, Meghnath Dhimal, Ulrich Kuch, Ruth Müller
BACKGROUND: Malaria, a parasitic infection, is a life-threatening disease in South Sumatra Province, Indonesia. This study aimed to investigate the spatial association between malaria occurrence and environmental risk factors. METHODS: The number of confirmed malaria cases was analysed for the year 2013 from the routine reporting of the Provincial Health Office of South Sumatra. The cases were spread over 436 out of 1613 villages. Six potential ecological predictors of malaria cases were analysed in the different regions using ordinary least square (OLS) and geographically weighted regression (GWR)...
February 20, 2018: Malaria Journal
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