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Geographically weighted regression

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https://www.readbyqxmd.com/read/28818072/use-of-hospital-based-health-care-services-among-children-aged-1-through-9%C3%A2-years-who-were-born-very-preterm-a-population-based-study
#1
Søren T Klitkou, Tor Iversen, Hans J Stensvold, Arild Rønnestad
BACKGROUND: Very preterm (VPT) children, with a birth weight below 1500 g or delivered before 32 weeks of gestational age, are at increased risk of poorer long-term health outcomes and higher rates of hospitalization in childhood. However, considerable variation exists in the need for in-hospital care within this population. We assessed the utilization and distribution of hospital-based care from ages 1 through 9 years for a nationwide population. METHODS: This was a population-based cohort of VPT children born in the period 2001-2009...
August 17, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28765549/improving-satellite-based-pm2-5-estimates-in-china-using-gaussian-processes-modeling-in-a-bayesian-hierarchical-setting
#2
Wenxi Yu, Yang Liu, Zongwei Ma, Jun Bi
Using satellite-based aerosol optical depth (AOD) measurements and statistical models to estimate ground-level PM2.5 is a promising way to fill the areas that are not covered by ground PM2.5 monitors. The statistical models used in previous studies are primarily Linear Mixed Effects (LME) and Geographically Weighted Regression (GWR) models. In this study, we developed a new regression model between PM2.5 and AOD using Gaussian processes in a Bayesian hierarchical setting. Gaussian processes model the stochastic nature of the spatial random effects, where the mean surface and the covariance function is specified...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28759569/proposed-equations-and-reference-values-for-calculating-bone-health-in-children-and-adolescent-based-on-age-and-sex
#3
Rossana Gómez-Campos, Cynthia Lee Andruske, Miguel de Arruda, Camilo Urra Albornoz, Marco Cossio-Bolaños
BACKGROUND: The Dual Energy X-Ray Absorptiometry (DXA) is the gold standard for measuring BMD and bone mineral content (BMC). In general, DXA is ideal for pediatric use. However, the development of specific standards for particular geographic regions limits its use and application for certain socio-cultural contexts. Additionally, the anthropometry may be a low cost and easy to use alternative method in epidemiological contexts. The goal of our study was to develop regression equations for predicting bone health of children and adolescents based on anthropometric indicators to propose reference values based on age and sex...
2017: PloS One
https://www.readbyqxmd.com/read/28756314/incorporating-twitter-based-human-activity-information-in-spatial-analysis-of-crashes-in-urban-areas
#4
Jie Bao, Pan Liu, Hao Yu, Chengcheng Xu
The primary objective of this study was to investigate how to incorporate human activity information in spatial analysis of crashes in urban areas using Twitter check-in data. This study used the data collected from the City of Los Angeles in the United States to illustrate the procedure. The following five types of data were collected: crash data, human activity data, traditional traffic exposure variables, road network attributes and social-demographic data. A web crawler by Python was developed to collect the venue type information from the Twitter check-in data automatically...
July 27, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28732016/maternal-residential-proximity-to-unconventional-gas-development-and-perinatal-outcomes-among-a-diverse-urban-population-in-texas
#5
Kristina W Whitworth, Amanda K Marshall, Elaine Symanski
OBJECTIVE: To assess associations between unconventional natural gas development (UGD) and perinatal outcomes. METHODS: We conducted a retrospective birth cohort study among 158,894 women with a birth or fetal death from November 30, 2010-November 29, 2012 in the Barnett Shale, in North Texas. We constructed three UGD-activity metrics by calculating the inverse distance-weighted sum of active wells within three separate geographic buffers surrounding the maternal residence: ≤½, 2, or 10-miles...
2017: PloS One
https://www.readbyqxmd.com/read/28728351/analysis-of-the-relationship-between-community-characteristics-and-depression-using-geographically-weighted-regression
#6
Hyungyun Choi, Ho Kim
No abstract text is available yet for this article.
June 21, 2017: Epidemiology and Health
https://www.readbyqxmd.com/read/28724371/association-between-full-service-and-fast-food-restaurant-density-dietary-intake-and-overweight-obesity-among-adults-in-delhi-india
#7
Opal Patel, Safraj Shahulhameed, Roopa Shivashankar, Mohammad Tayyab, Atiqur Rahman, Dorairaj Prabhakaran, Nikhil Tandon, Lindsay M Jaacks
BACKGROUND: The food environment has been implicated as an underlying contributor to the global obesity epidemic. However, few studies have evaluated the relationship between the food environment, dietary intake, and overweight/obesity in low- and middle-income countries (LMICs). The aim of this study was to assess the association of full service and fast food restaurant density with dietary intake and overweight/obesity in Delhi, India. METHODS: Data are from a cross-sectional, population-based study conducted in Delhi...
July 19, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28709033/vegetated-land-cover-near-residence-is-associated-with-reduced-allostatic-load-and-improved-biomarkers-of-neuroendocrine-metabolic-and-immune-functions
#8
Andrey I Egorov, Shannon M Griffin, Reagan R Converse, Jennifer N Styles, Elizabeth A Sams, Anthony Wilson, Laura E Jackson, Timothy J Wade
BACKGROUND: Greater exposure to urban green spaces has been linked to reduced risks of depression, cardiovascular disease, diabetes and premature death. Alleviation of chronic stress is a hypothesized pathway to improved health. Previous studies linked chronic stress with a biomarker-based composite measure of physiological dysregulation known as allostatic load. OBJECTIVE: This study's objective was to assess the relationship between vegetated land cover near residences and allostatic load...
July 11, 2017: Environmental Research
https://www.readbyqxmd.com/read/28683394/national-trend-survey-of-hospitalized-patients-with-febrile-seizure-in-the-united-states
#9
Yusuke Okubo, Atsuhiko Handa
PURPOSE: Several studies have reported the prevalence and incidence of febrile seizure (FS) among children in the USA and other countries. However, recent trends in FS among hospitalized children, hospital course, and risk factors for its severity remain unknown at a national level in the USA. METHOD: Hospital discharge records of patients with FS aged <6years were obtained for the years 2003, 2006, 2009, and 2012 from the Kid's Inpatient Database. Data were weighted to estimate the annual hospitalization rates with respect to gender and race/ethnicity in the United States...
June 24, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28679233/multifractal-temporally-weighted-detrended-cross-correlation-analysis-to-quantify-power-law-cross-correlation-and-its-application-to-stock-markets
#10
Yun-Lan Wei, Zu-Guo Yu, Hai-Long Zou, Vo Anh
A new method-multifractal temporally weighted detrended cross-correlation analysis (MF-TWXDFA)-is proposed to investigate multifractal cross-correlations in this paper. This new method is based on multifractal temporally weighted detrended fluctuation analysis and multifractal cross-correlation analysis (MFCCA). An innovation of the method is applying geographically weighted regression to estimate local trends in the nonstationary time series. We also take into consideration the sign of the fluctuations in computing the corresponding detrended cross-covariance function...
June 2017: Chaos
https://www.readbyqxmd.com/read/28666446/estimating-the-prevalence-of-26-health-related-indicators-at-neighbourhood-level-in-the-netherlands-using-structured-additive-regression
#11
Jan van de Kassteele, Laurens Zwakhals, Oscar Breugelmans, Caroline Ameling, Carolien van den Brink
BACKGROUND: Local policy makers increasingly need information on health-related indicators at smaller geographic levels like districts or neighbourhoods. Although more large data sources have become available, direct estimates of the prevalence of a health-related indicator cannot be produced for neighbourhoods for which only small samples or no samples are available. Small area estimation provides a solution, but unit-level models for binary-valued outcomes that can handle both non-linear effects of the predictors and spatially correlated random effects in a unified framework are rarely encountered...
July 1, 2017: International Journal of Health Geographics
https://www.readbyqxmd.com/read/28660163/effective-environmental-factors-on-geographical-distribution-of-traffic-accidents-on-pedestrians-downtown-tehran-city
#12
Ali Moradi, Hamid Soori, Amir Kavousi, Farshid Eshghabadi, Shahrzad Nematollahi, Salahdien Zeini
INTRODUCTION: In most countries, occurrence of traffic causalities is high in pedestrians. The aim of this study is to geographically analyze the traffic casualties in pedestrians in downtown Tehran city. METHODS: The study population consisted of traffic injury accidents in pedestrians occurred during 2015 in Tehran city. Data were extracted from offices of traffic police and municipality. For analysis of environmental factors and site of accidents, ordinary least square regression models and geographically weighted regression were used...
April 2017: International Journal of Critical Illness and Injury Science
https://www.readbyqxmd.com/read/28652819/patient-reported-prevalence-and-symptomatic-burden-of-uterine-fibroids-among-women-in-the-united-states-findings-from-a-cross-sectional-survey-analysis
#13
Mahesh J Fuldeore, Ahmed M Soliman
PURPOSE: To estimate the prevalence of women diagnosed with uterine fibroids and the associated symptom burden in the US. PATIENTS AND METHODS: Responses of women aged 18-54 years, who completed an online survey, were analyzed. Data were weighted based on age, education, race, geographic region, income, and propensity score to derive national estimates of the prevalence of women diagnosed with uterine fibroids and associated symptom burden. Weighted means and percentages were reported...
2017: International Journal of Women's Health
https://www.readbyqxmd.com/read/28647486/geographically-weighted-negative-binomial-regression-applied-to-zonal-level-safety-performance-models
#14
Marcos José Timbó Lima Gomes, Flávio Cunto, Alan Ricardo da Silva
Generalized Linear Models (GLM) with negative binomial distribution for errors, have been widely used to estimate safety at the level of transportation planning. The limited ability of this technique to take spatial effects into account can be overcome through the use of local models from spatial regression techniques, such as Geographically Weighted Poisson Regression (GWPR). Although GWPR is a system that deals with spatial dependency and heterogeneity and has already been used in some road safety studies at the planning level, it fails to account for the possible overdispersion that can be found in the observations on road-traffic crashes...
June 22, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28623074/geographic-variability-in-gestational-weight-gain-a-multilevel-population-based-study-of-women-having-term-births-in-florida-2005-2012
#15
Maya Tabet, Erik Nelson, Mario Schootman, Lung-Chang Chien, Jen Jen Chang
PURPOSE: We examined the extent of geographic variability in gestational weight gain (GWG), identified areas where women have suboptimal GWG, and evaluated whether individual- and area-level factors account for such variability. METHODS: We conducted a population-based cohort study including 1,385,574 women delivering term, singleton, and live births in Florida. We used a Bayesian, structured additive regression with a spatial function to analyze data from Florida's birth certificates (2005-2012) and ZIP code tabulation areas (ZCTAs; 2010 Census)...
June 1, 2017: Annals of Epidemiology
https://www.readbyqxmd.com/read/28617348/urban-ecological-security-simulation-and-prediction-using-an-improved-cellular-automata-ca-approach-a-case-study-for-the-city-of-wuhan-in-china
#16
Yuan Gao, Chuanrong Zhang, Qingsong He, Yaolin Liu
Ecological security is an important research topic, especially urban ecological security. As highly populated eco-systems, cities always have more fragile ecological environments. However, most of the research on urban ecological security in literature has focused on evaluating current or past status of the ecological environment. Very little literature has carried out simulation or prediction of future ecological security. In addition, there is even less literature exploring the urban ecological environment at a fine scale...
June 15, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28608606/waist-to-height-ratio-and-its-association-with-tv-viewing-in-a-sample-of-portuguese-children-aged-7-9-years
#17
Aristides M Machado-Rodrigues, João Valente-Dos-Santos, Romulo Fernandes, Augusta Gama, Isabel Mourao, Helena Nogueira, Vitor Marques, Cristina Padez
INTRODUCTION: During the past decades, increased TV viewing and reduced physical activity (PA) levels may have contributed to the increased prevalence of pediatric obesity. This study aimed to analyze the association between TV viewing and central adiposity risk in Portuguese children. METHODS: The sample comprised 3987 children (1997 girls and 1990 boys) aged 7-9 years. Height, weight, and waist circumference (WC) were measured. Waist-to-height ratio (WHtR) was calculated as the ratio of waist/height with a cut-off of 0...
June 13, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/28589236/geographic-variation-in-mental-health-care-disparities-among-racially-ethnically-diverse-adults-with-psychiatric-disorders
#18
Giyeon Kim, Natalie Dautovich, Katy-Lauren Ford, Daniel E Jimenez, Benjamin Cook, Richard M Allman, Patricia Parmelee
PURPOSE: The main purpose of this paper is to examine geographic variation in unmet need for mental health care among racially/ethnically diverse adults with psychiatric disorders in the US. METHODS: Drawn from the Collaborative Psychiatric Epidemiology Surveys (CPES; 2001-2003), adults with any past year psychiatric disorder diagnosis (n = 3211) from diverse racial/ethnic backgrounds were selected for analyses. Using weighted data, descriptive analyses and logistic regression analyses were conducted...
August 2017: Social Psychiatry and Psychiatric Epidemiology
https://www.readbyqxmd.com/read/28580392/a-genome-wide-association-study-meta-analysis-of-clinical-fracture-in-10-012-african-american-women
#19
Kira C Taylor, Daniel S Evans, Digna R Velez Edwards, Todd L Edwards, Tamar Sofer, Guo Li, Youfang Liu, Nora Franceschini, Rebecca D Jackson, Ayush Giri, Macarius Donneyong, Bruce Psaty, Jerome I Rotter, Andrea Z LaCroix, Joanne M Jordan, John A Robbins, Beth Lewis, Marcia L Stefanick, Yongmei Liu, Melissa Garcia, Tamara Harris, Jane A Cauley, Kari E North
BACKGROUND: Osteoporosis is a major public health problem associated with excess disability and mortality. It is estimated that 50-70% of the variation in osteoporotic fracture risk is attributable to genetic factors. The purpose of this hypothesis-generating study was to identify possible genetic determinants of fracture among African American (AA) women in a GWAS meta-analysis. METHODS: Data on clinical fractures (all fractures except fingers, toes, face, skull or sternum) were analyzed among AA female participants in the Women's Health Initiative (WHI) (N = 8155), Cardiovascular Health Study (CHS) (N = 504), BioVU (N = 704), Health ABC (N = 651), and the Johnston County Osteoarthritis Project (JoCoOA) (N = 291)...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28573469/geographic-epidemiology-of-hepatocellular-carcinoma-viral-hepatitis-and-socioeconomic-position-in-new-york-city
#20
Mary M Ford, Elena Ivanina, Payal Desai, Linda Highfield, Baozhen Qiao, Maria J Schymura, Fabienne Laraque
PURPOSE: Liver cancer (hepatocellular carcinoma (HCC)) incidence and mortality rates are increasing in the United States. New York City (NYC) has a high burden of liver cancer risk factors, including hepatitis C (HCV) and hepatitis B (HBV) infection, which disproportionately affect persons of low socioeconomic position. Identifying neighborhoods with HCC disparities is essential to effectively define targeted cancer control strategies. METHODS: New York State Cancer Registry data from 1 January 2001 through 31 December 2012 were matched with NYC HCV and HBV surveillance data...
June 1, 2017: Cancer Causes & Control: CCC
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