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Spatio-temporal relative survival of breast and colorectal cancer in Queensland, Australia 2001-2011
This study investigated changes in breast and colorectal cancer survival across 478 areas over 11 years (2001-2011), and the influence of early diagnosis on changes. Queensland Cancer Registry data were analysed using an introduced Bayesian spatio-temporal flexible parametric relative survival model. All areas showed survival improvements between 2001-2003 and 2008-2011. The median absolute 5-year survival improvement for localised breast cancer was small (1.8%), compared to advanced (4.8%) and unknown (7.9%) breast cancer, as well as localised (2.6%), advanced (5.0%) and unknown (4.8%) colorectal cancers. Improvements in ...
Source: Spatial and Spatio-temporal Epidemiology - September 5, 2016 Category: Epidemiology Source Type: research

Spatio-temporal variation of mood and anxiety symptom treatments in Christchurch in the context of the 2010/11 Canterbury earthquake sequence
This article explores the spatio-temporal variation of mood and anxiety treatments in the context of a severe earthquake sequence. The aim was to examine a possible earthquake exposure effect, identify populations at risk and areas with particularly large mood and anxiety treatment rate increases or decreases in the affected Christchurch urban area. A significantly stronger increase of mood and anxiety treatments among residents in Christchurch compared to others in New Zealand have been found, as well as children and elderly identified as especially vulnerable. Spatio-temporal cluster analysis and Bayesian spatio-temporal...
Source: Spatial and Spatio-temporal Epidemiology - September 2, 2016 Category: Epidemiology Source Type: research

The Spatio-Temporal Relationship Between Alcohol Outlets And Violence Before And After Privatization: A Natural Experiment, Seattle, Wa 2010-2013
Publication date: Available online 1 September 2016 Source:Spatial and Spatio-temporal Epidemiology Author(s): Loni Philip Tabb, Lance Ballester, Tony H. Grubesic Alcohol-related violence is a well-documented public health concern, where various individual and community-level factors contribute to this relationship. The purpose of this study is to examine the impact of a significant policy change at the local level, which privatized liquor sales and distribution. Specifically, we explored the relationship between alcohol and violence in Seattle, WA, 2010-2013, via hierarchical spatio-temporal disease mapping models. T...
Source: Spatial and Spatio-temporal Epidemiology - September 1, 2016 Category: Epidemiology Source Type: research

Spatial disparities in melanoma incidence and prognosis with consideration to stage at diagnosis, gender and marital status
Publication date: Available online 22 July 2016 Source:Spatial and Spatio-temporal Epidemiology Author(s): Ulf Strömberg, Anders Holmén, Stefan Peterson Screening strategies need to consider differences in late-stage disease detection linked to socio-demographic and geographic factors. We specifically addressed disparity in melanoma stage at diagnosis linked to residential municipality, gender and marital status within the middle- and old-age population of southern and western Sweden. Population-based registers were used to identify the melanoma cases diagnosed in 2004–2013 (n =7,417). Disease mapping for each pop...
Source: Spatial and Spatio-temporal Epidemiology - August 12, 2016 Category: Epidemiology Source Type: research

Editorial for SSTE special issue on Environment and Health
Publication date: August 2016 Source:Spatial and Spatio-temporal Epidemiology, Volume 18 Author(s): Duncan Lee, Sujit Sahu, Gavin Shaddick (Source: Spatial and Spatio-temporal Epidemiology)
Source: Spatial and Spatio-temporal Epidemiology - August 12, 2016 Category: Epidemiology Source Type: research

Spatial variations in cervical cancer prevention in Colombia: Geographical differences and associated socio-demographic factors
We examined spatial variations in the frequencies of women who had not heard of human papillomavirus vaccination (NHrd-Vac) and who had not had Pap testing (NHd-Pap) among Colombian administrative divisions (departments), before and after considering differences in socio-demographic factors. Following global and local tests for clustering, Bayesian Poisson hierarchical models identified department factors associated with NHrd-Vac and NHd-Pap, as well as the extent of the spatially structured and unstructured heterogeneity. Models of spatial variations for both outcomes included the department percentage of women with subsi...
Source: Spatial and Spatio-temporal Epidemiology - August 12, 2016 Category: Epidemiology Source Type: research

Comparing children ’s GPS tracks with geospatial proxies for exposure to junk food
This study conducts a GIS-based analysis of GPS tracks—‘activity spaces’—and 21 proxies for activity spaces (e.g. buffers, container approaches) for a sample of 526 children (ages 9–14) in London, Ontario, Canada. These measures are combined with a validated food environment database (including fast food and convenience stores) to create a series of junk food exposure estimates and quantify the errors resulting from use of different proxy methods. Results indicate that exposure proxies consistently underestimate exposure to junk foods by as much as 68%. This underestimation is important to policy development beca...
Source: Spatial and Spatio-temporal Epidemiology - June 22, 2016 Category: Epidemiology Source Type: research

Space –time airborne disease mapping applied to detect specific behaviour of varicella in Valencia, Spain
Publication date: July–October 2015 Source:Spatial and Spatio-temporal Epidemiology, Volumes 14–15 Author(s): Adina Iftimi, Francisco Montes, Ana Míguez Santiyán, Francisco Martínez-Ruiz Airborne diseases are one of humanity’s most feared sicknesses and have regularly caused concern among specialists. Varicella is an airborne disease which usually affects children before the age of 10. Because of its nature, varicella gives rise to interesting spatial, temporal and spatio-temporal patterns. This paper studies spatio-temporal exploratory analysis tools to detect specific behaviour of varicella in the ci...
Source: Spatial and Spatio-temporal Epidemiology - June 22, 2016 Category: Epidemiology Source Type: research

Space –time mapping of wasting among children under the age of five years in Somalia from 2007 to 2010
Conclusion There was a clear seasonal variation in wasting with minimal year-to-year variability from 2007 to 2010 in Somalia. The prevalence was high during the long dry season, which affects the prevalence in the preceding long rainy season. Understanding the seasonal fluctuations of wasting in different locations and at different times is important to inform timely interventions. (Source: Spatial and Spatio-temporal Epidemiology)
Source: Spatial and Spatio-temporal Epidemiology - June 22, 2016 Category: Epidemiology Source Type: research

Model-based testing for space –time interaction using point processes: An application to psychiatric hospital admissions in an urban area
Publication date: May 2016 Source:Spatial and Spatio-temporal Epidemiology, Volume 17 Author(s): Sebastian Meyer, Ingeborg Warnke, Wulf Rössler, Leonhard Held Spatio-temporal interaction is inherent to cases of infectious diseases and occurrences of earthquakes, whereas the spread of other events, such as cancer or crime, is less evident. Statistical significance tests of space–time clustering usually assess the correlation between the spatial and temporal (transformed) distances of the events. Although appealing through simplicity, these classical tests do not adjust for the underlying population nor can th...
Source: Spatial and Spatio-temporal Epidemiology - June 22, 2016 Category: Epidemiology Source Type: research

Modelling African swine fever presence and reported abundance in the Russian Federation using national surveillance data from 2007 to 2014
Publication date: Available online 16 June 2016 Source:Spatial and Spatio-temporal Epidemiology Author(s): Timothée Vergne, Fedor Korennoy, Lisa Combelles, Andrey Gogin, Dirk U. Pfeiffer African swine fever (ASF) is a viral disease of swine that has been present in the Russian Federation since 2007. Counts of ASF outbreaks reported in the Southern regions of the country (2007-2014) were aggregated to a grid of hexagons, and a zero-inflated Poisson model accounting for spatial dependence between hexagons was used to identify factors associated with the presence of ASF outbreaks and factors associated with the...
Source: Spatial and Spatio-temporal Epidemiology - June 16, 2016 Category: Epidemiology Source Type: research

Geographical variation in a fatal outcome of acute myocardial infarction and association with contact to a general practitioner
Conclusions A fatal outcome of AMI was significantly associated with contact to a GP. A high population to GP ratio and long distance to GP could not explain the increased odds of a fatal outcome of AMI for individuals with no contact to a GP. (Source: Spatial and Spatio-temporal Epidemiology)
Source: Spatial and Spatio-temporal Epidemiology - June 15, 2016 Category: Epidemiology Source Type: research

Investigating trends in asthma and COPD through multiple data sources: a small area study
Publication date: Available online 11 June 2016 Source:Spatial and Spatio-temporal Epidemiology Author(s): Areti Boulieri, Anna Hansell, Marta Blangiardo This paper investigates trends in asthma and COPD by using multiple data sources to help understanding the relationships between disease prevalence, morbidity and mortality. GP drug prescriptions, hospital admissions, and deaths are analysed at clinical commissioning group (CCG) level in England from August 2010 to March 2011. A Bayesian hierarchical model is used for the analysis, which takes into account the complex space and time dependencies of asthma and CO...
Source: Spatial and Spatio-temporal Epidemiology - June 15, 2016 Category: Epidemiology Source Type: research

Joint modeling of Anaemia and Malaria in children under five in Nigeria
Publication date: May 2016 Source:Spatial and Spatio-temporal Epidemiology, Volume 17 Author(s): Samson B. Adebayo, Ezra Gayawan, Christian Heumann, Christian Seiler Malaria and anaemia which jointly account for high proportion of morbidity and mortality among young children in developing countries have been individually studied using binary regression model. We adopt geoadditive latent variable model for binary/ordinal indicators to analyze the influence of variables of different types on the morbidity among young children in Nigeria. Latent variable models allow for the analysis of multidimensional response v...
Source: Spatial and Spatio-temporal Epidemiology - June 3, 2016 Category: Epidemiology Source Type: research

Accelerating the discovery of space-time patterns of infectious diseases using parallel computing
Publication date: Available online 27 May 2016 Source:Spatial and Spatio-temporal Epidemiology Author(s): Alexander Hohl, Eric Delmelle, Wenwu Tang, Irene Casas Infectious diseases have complex transmission cycles, and effective public health responses require the ability to monitor outbreaks in a timely manner. Space-time statistics facilitate the discovery of disease dynamics including rate of spread and seasonal cyclic patterns, but are computationally demanding, especially for datasets of increasing size, diversity and availability. High-performance computing reduces the effort required to identify these pa...
Source: Spatial and Spatio-temporal Epidemiology - June 3, 2016 Category: Epidemiology Source Type: research