SaTScan

SaTScan
  • 文章类型: Journal Article
    结块性皮肤病是一种病毒性疾病,会影响属于Capropoxvirus属(Poxviridae)的牛,并导致重大的经济损失。
    这项研究的目的是评估块状皮肤病(LSD)暴发的分布,并根据埃塞俄比亚的回顾性暴发报告预测未来的模式。
    数据是通过与区域实验室的直接沟通以及从农民协会到农业部的分层报告系统收集的。使用经典的加性时间序列分解和STL分解分析了LSD爆发的时间序列数据。四种型号(ARIMA,SARIMA,ETS,STLF)还用于预测进行模型准确性测试后的年份(2021-2025年)每月发生的LSD爆发次数。此外,时空排列模型(STP)也用于研究埃塞俄比亚LSD暴发的回顾性时空聚类分析.
    这项研究调查了2008年至2020年埃塞俄比亚LSD爆发的地理和时间分布,共报告了3,256次LSD爆发,14,754例LSD阳性病例,7758人死亡,还有289次屠杀.它还覆盖了埃塞俄比亚大约68%的地区,奥罗米亚报告的LSD爆发次数最高。在LSD的时间分布中,据报道,9月至12月的雨季之后是最高峰,而4月和5月的干旱月份是最高峰。在为预测而测试的四个模型中,SARIMA(3,0,0)(2,1,0)[12]模型对验证数据表现良好,而STLF随机游走对训练数据有很强的预测。因此,SARIMA和STLF随机游走模型对2020年至2025年之间的LSD爆发进行了更准确的预测。从LSD的回顾性时空聚类分析,还确定了八个可能的集群,其中五个位于埃塞俄比亚中部。
    该研究的时间序列和对LSD爆发数据的ST聚类分析为埃塞俄比亚疾病的时空动态提供了有价值的见解。这些见解可以帮助制定控制和预防疾病传播的有效策略,并具有改善该国抗击LSD的努力的巨大潜力。
    UNASSIGNED: Lumpy skin disease is a viral disease that affects cattle belonging to genus Capripoxvirus (Poxviridae) and lead to significant economic losses.
    UNASSIGNED: The objective of this study was to evaluate the distribution of lumpy skin disease (LSD) outbreaks and predict future patterns based on retrospective outbreak reports in Ethiopia.
    UNASSIGNED: Data were collected through direct communication with regional laboratories and a hierarchical reporting system from the Peasant Associations to Ministry of Agriculture. Time-series data for the LSD outbreaks were analyzed using classical additive time-series decomposition and STL decomposition. Four models (ARIMA, SARIMA, ETS, STLF) were also used to forecast the number of LSD outbreaks that occurred each month for the years (2021-2025) after the models\' accuracy test was performed. Additionally, the space-time permutation model (STP) were also used to study retrospective space-time cluster analysis of LSD outbreaks in Ethiopia.
    UNASSIGNED: This study examined the geographical and temporal distribution of LSD outbreaks in Ethiopia from 2008 to 2020, reporting a total of 3,256 LSD outbreaks, 14,754 LSD-positive cases, 7,758 deaths, and 289 slaughters. It also covered approximately 68% of Ethiopia\'s districts, with Oromia reporting the highest LSD outbreaks. In the LSD\'s temporal distribution, the highest peak was reported following the rainy season in September to December and its lowest peak in the dry months of April and May. Out of the four models tested for forecasting, the SARIMA (3, 0, 0) (2, 1, 0) [12] model performed well for the validation data, while the STLF+Random Walk had a robust prediction for the training data. Thus, the SARIMA and STLF+Random Walk models produced a more accurate forecast of LSD outbreaks between 2020 and 2025. From retrospective Space-Time Cluster Analysis of LSD, eight possible clusters were also identified, with five of them located in central part of Ethiopia.
    UNASSIGNED: The study\'s time series and ST-cluster analysis of LSD outbreak data provide valuable insights into the spatial and temporal dynamics of the disease in Ethiopia. These insights can aid in the development of effective strategies to control and prevent the spread of the disease and holds great potential for improving efforts to combat LSD in the country.
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  • 文章类型: Journal Article
    2019年冠状病毒病(COVID-19)是由严重急性呼吸道综合征冠状病毒2(SARS-CoV-2)引起的。美国(U.S.)报告的COVID-19感染和相关死亡人数是世界上最高的,截至2021年8月,占全球确诊病例总数的17.8%。随着COVID-19在美国各地的社区传播,很明显,不同的人口结构之间会出现不平等。几位研究人员认为,某些种族和少数族裔群体可能受到COVID-19传播的不成比例的影响。在本研究中,我们使用了堪萨斯城的COVID-19病例的每日数据,密苏里州,为了观察COVID-19集群在性别方面的差异,种族,和种族。具体来说,我们利用人口统计因素的回顾性Poisson空间扫描统计量,在2020年3月至11月在堪萨斯城以邮政编码水平检测COVID-19的每日聚集性.我们的统计结果表明,男性群体比女性群体更分散。西班牙裔人口的集群患病率最高,并且分布范围也更广泛。这种人口统计学聚类分析可以为减少与COVID-19大流行相关的社会不平等提供指导。此外,对新兴集群采取更强有力的预防和控制措施,可以减少另一波流行病感染的可能性。
    Coronavirus disease 2019 (COVID-19) is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The United States (U.S.) has the highest number of reported COVID-19 infections and related deaths in the world, accounting for 17.8% of total global confirmed cases as of August 2021. As COVID-19 spread throughout communities across the U.S., it became clear that inequities would arise among differing demographics. Several researchers have suggested that certain racial and ethnic minority groups may have been disproportionately impacted by the spread of COVID-19. In the present study, we used the daily data of COVID-19 cases in Kansas City, Missouri, to observe differences in COVID-19 clusters with respect to gender, race, and ethnicity. Specifically, we utilized a retrospective Poisson spatial scan statistic with respect to demographic factors to detect daily clusters of COVID-19 in Kansas City at the zip code level from March to November 2020. Our statistical results indicated that clusters of the male population were more widely scattered than clusters of the female population. Clusters of the Hispanic population had the highest prevalence and were also more widely scattered. This demographic cluster analysis can provide guidance for reducing the social inequalities associated with the COVID-19 pandemic. Moreover, applying stronger preventive and control measures to emerging clusters can reduce the likelihood of another epidemic wave of infection.
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  • 文章类型: Journal Article
    The Quebec Public Health Institute (INSPQ) was mandated to develop an automated tool for detecting space-time COVID-19 case clusters to assist regional public health authorities in identifying situations that require public health interventions. This article aims to describe the methodology used and to document the main outcomes achieved.
    New COVID-19 cases are supplied by the \"Trajectoire de santé publique\" information system, geolocated to civic addresses and then aggregated by day and dissemination area. To target community-level clusters, cases identified as residents of congregate living settings are excluded from the cluster detection analysis. Detection is performed using the space-time scan statistic and Poisson statistical model, and implemented in the SaTScan software. Information on detected clusters is disseminated daily via an online interactive mapping interface.
    The number of clusters detected tracked with the number of new cases. Slightly more than 4900 statistically significant (p ≤ 0.01) space-time clusters were detected over 14 health regions from May to October 2020. The Montréal region was the most affected.
    Considering the objective of timely cluster detection, the use of near-real-time health surveillance data of varying quality over time and by region constitutes an acceptable compromise between timeliness and data quality. This tool serves to supplement the epidemiologic investigations carried out by regional public health authorities for purposes of COVID-19 management and prevention.
    RéSUMé: OBJECTIFS: L’Institut national de santé publique du Québec (INSPQ) a reçu le mandat d’élaborer un outil de détection automatisé des agrégats spatio-temporels des cas de COVID-19 afin d’aider les régions à détecter des situations nécessitant des interventions de santé publique. Cet article vise à décrire la méthodologie utilisée et à présenter les principaux résultats obtenus. MéTHODE: Les nouveaux cas de COVID-19 proviennent du Système d’information Trajectoire de santé publique, ils sont géolocalisés à l’adresse civique, puis agrégés par jour et par aire de diffusion. Afin d’isoler la transmission communautaire, les cas identifiés comme résidents d’un milieu de vie fermé sont exclus des analyses de détection des agrégats. La méthode de détection est la statistique de balayage spatio-temporel basée sur le modèle de Poisson et implantée dans le logiciel SaTScan . Les agrégats détectés sont diffusés quotidiennement dans une interface cartographique web interactive. RéSULTATS: Le nombre d’agrégats détectés varie en fonction du nombre de nouveaux cas. Un peu plus de 4 900 agrégats spatio-temporels statistiquement significatifs (p ≤ 0,01) ont été détectés dans 14 régions sociosanitaires entre mai et octobre 2020. La région de Montréal est la plus touchée. CONCLUSION: Considérant l’objectif d’une détection d’agrégats en temps opportun, l’utilisation des données de vigie sanitaire en temps quasi réel, dont la qualité est variable dans le temps et selon les régions, constitue un compromis acceptable. Il s’agit d’un outil complémentaire aux enquêtes épidémiologiques menées par les autorités régionales de santé publique dans la gestion et la prévention des impacts populationnels de la COVID-19.
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