Open Access. Powered by Scholars. Published by Universities.®

Medicine and Health Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Veterinary Medicine

Selected Works

GIS and Spatial Epidemiology

Articles 1 - 8 of 8

Full-Text Articles in Medicine and Health Sciences

Socioeconomic Determinants Of Geographic Disparities In Campylobacteriosis Risk: A Comparison Of Global And Local Modeling Approaches, Jennifer Weisent, Barton Rohrbach, John Dunn, Agricola Odoi Oct 2012

Socioeconomic Determinants Of Geographic Disparities In Campylobacteriosis Risk: A Comparison Of Global And Local Modeling Approaches, Jennifer Weisent, Barton Rohrbach, John Dunn, Agricola Odoi

Agricola Odoi

Background: Socioeconomic factors play a complex role in determining the risk of campylobacteriosis. Understanding the spatial interplay between these factors and disease risk can guide disease control programs. Historically, Poisson and negative binomial models have been used to investigate determinants of geographic disparities in risk. Spatial regression models, which allow modeling of spatial effects, have been used to improve these modeling efforts. Geographically weighted regression (GWR) takes this a step further by estimating local regression coefficients, thereby allowing estimations of associations that vary in space. These recent approaches increase our understanding of how geography influences the associations between determinants and …


Does Place Of Residence Affect Risk Of Suicide? A Spatial Epidemiologic Investigation In Kentucky From 1999 To 2008, Daniel M. Saman, Sabrina Walsh, Anna Borowko, Agricola Odoi Feb 2012

Does Place Of Residence Affect Risk Of Suicide? A Spatial Epidemiologic Investigation In Kentucky From 1999 To 2008, Daniel M. Saman, Sabrina Walsh, Anna Borowko, Agricola Odoi

Agricola Odoi

Background: Approximately 32,000 people take their own lives every year in the United States. In Kentucky, suicide mortality rates have been steadily increasing since 1999. Few studies in the United States have assessed spatial clustering of suicides. The purpose of this study was to identify high-risk clusters of suicide at the county level in Kentucky and assess the characteristics of those suicide cases within the clusters. Methods: A spatial epidemiological study was undertaken using suicide data for the period January 1, 1999 to December 31, 2008, obtained from the Kentucky Office of Vital Statistics. Descriptive analyses using Pearson's chi-square test …


A Spatial Cluster Analysis Of Tractor Overturns In Kentucky From 1960 To 2002, Daniel M. Saman, Henry P. Cole, Agricola Odoi, Melvin L. Myers, Daniel I. Carey, Susan C. Westneat Jan 2012

A Spatial Cluster Analysis Of Tractor Overturns In Kentucky From 1960 To 2002, Daniel M. Saman, Henry P. Cole, Agricola Odoi, Melvin L. Myers, Daniel I. Carey, Susan C. Westneat

Agricola Odoi

Background: Agricultural tractor overturns without rollover protective structures are the leading cause of farm fatalities in the United States. To our knowledge, no studies have incorporated the spatial scan statistic in identifying high-risk areas for tractor overturns. The aim of this study was to determine whether tractor overturns cluster in certain parts of Kentucky and identify factors associated with tractor overturns. Methods: A spatial statistical analysis using Kulldorff’s spatial scan statistic was performed to identify county clusters at greatest risk for tractor overturns. A regression analysis was then performed to identify factors associated with tractor overturns. Results: The spatial analysis …


Neighborhood Disparities In Stroke And Myocardial Infarction Mortality: A Gis And Spatial Scan Statistics Approach, Agricola Odoi Aug 2011

Neighborhood Disparities In Stroke And Myocardial Infarction Mortality: A Gis And Spatial Scan Statistics Approach, Agricola Odoi

Agricola Odoi

Background: Stroke and myocardial infarction (MI) are serious public health burdens in the US. These burdens vary by geographic location with the highest mortality risks reported in the southeastern US. While these disparities have been investigated at state and county levels, little is known regarding disparities in risk at lower levels of geography, such as neighborhoods. Therefore, the objective of this study was to investigate spatial patterns of stroke and MI mortality risks in the East Tennessee Appalachian Region so as to identify neighborhoods with the highest risks. Methods: Stroke and MI mortality data for the period 1999-2007, obtained free …


Assessing Risk In Focal Arboviral Infections: Are We Missing The Big Or Little Picture?, A D. Haddow, Agricola Odoi, C J. Jones Sep 2009

Assessing Risk In Focal Arboviral Infections: Are We Missing The Big Or Little Picture?, A D. Haddow, Agricola Odoi, C J. Jones

Agricola Odoi

BACKGROUND: Focal arboviral infections affecting a subset of the overall population present an often overlooked set of challenges in the assessment and reporting of risk and the detection of spatial patterns. Our objective was to assess the variation in risk when using different at-risk populations and geographic scales for the calculation of incidence risk and the detection of geographic hot-spots of infection. We explored these variations using a pediatric arbovirus, La Crosse virus (LACV), as our model. METHODS AND FINDINGS: Descriptive and cluster analyses were performed on probable and confirmed cases of LACV infections reported to the Tennessee Department of …


Inequalities In Neighbourhood Socioeconomic Characteristics: Potential Evidence-Base For Neighbourhood Health Planning., Agricola Odoi, R Wray, M Emo, S Birch, B Hutchison, J Eyles, T Abernathy Aug 2005

Inequalities In Neighbourhood Socioeconomic Characteristics: Potential Evidence-Base For Neighbourhood Health Planning., Agricola Odoi, R Wray, M Emo, S Birch, B Hutchison, J Eyles, T Abernathy

Agricola Odoi

BACKGROUND: Population health planning aims to improve the health of the entire population and to reduce health inequities among population groups. Socioeconomic factors are increasingly being recognized as major determinants of many aspects of health and causes of health inequities. Knowledge of socioeconomic characteristics of neighbourhoods is necessary to identify their unique health needs and enhance identification of socioeconomically disadvantaged populations. Careful integration of this knowledge into health planning activities is necessary to ensure that health planning and service provision are tailored to unique neighbourhood population health needs. In this study, we identify unique neighbourhood socioeconomic characteristics and classify the …


Investigation Of Clusters Of Giardiasis Using Gis And A Spatial Scan Statistic., Agricola Odoi, S W. Martin, P Michel, D Middleton, J Holt, J Wilson Jun 2004

Investigation Of Clusters Of Giardiasis Using Gis And A Spatial Scan Statistic., Agricola Odoi, S W. Martin, P Michel, D Middleton, J Holt, J Wilson

Agricola Odoi

BACKGROUND: Giardia lamblia is the most frequently identified human intestinal parasite in Canada with prevalence estimates of 4-10%. However, infection rates vary by geographical area and localized 'pockets' of high or low infection rates are thought to exist. Water-borne transmission is one of the major routes of infection. Sources of contamination of drinking water include humans, domestic and wild animals. A previous study in southern Ontario, Canada, indicated a bivariate association between giardiasis rates and livestock density and/or manure use on agricultural land; however these variables were not significant when the variable 'rural' was added to the model. In that …


Geographical And Temporal Distribution Of Human Giardiasis In Ontario, Canada., Agricola Odoi, S W. Martin, P Michel, J Holt, D Middleton, J Wilson Aug 2003

Geographical And Temporal Distribution Of Human Giardiasis In Ontario, Canada., Agricola Odoi, S W. Martin, P Michel, J Holt, D Middleton, J Wilson

Agricola Odoi

BACKGROUND: Giardia is the most frequently identified intestinal parasite in North America. Although information on geographical distribution of giardiasis is critical in identifying communities at high risk, little has been done in this area. Therefore, the objective of this study was to investigate the geographical and temporal distribution of human giardiasis in Ontario in order to identify possible high risk areas and seasons. Two spatial scales of analyses and two disease measures were used with a view to identifying the best of each in assessing geographical patterns of giardiasis in Ontario. Global Moran's I and Moran Local Indicators of Spatial …