Development and Application of the Flow Cluster Detection Method: A Case of Public Transit Trips in Seoul

2021 ◽  
Vol 21 (2) ◽  
pp. 129-144
Author(s):  
Seungmin Lee ◽  
◽  
Gunhak Lee
Keyword(s):  
Detection Method ◽  
Public Transit ◽  
Cluster Detection

scholarly journals Comparing Automated Cluster Detection Methods for Carbapenem-Resistant Enterobacteriaceae (CRE): Rule-Based Versus Statistical

2020 ◽  
Vol 41 (S1) ◽  
pp. s27-s27
Author(s):  
Rany Octaria ◽  
Hannah Griffith ◽  
Matthew Estes ◽  
Caleb Wiedeman ◽  
Allison Chan ◽  
...  
Keyword(s):  
Public Health ◽  
Detection Method ◽  
Space Time ◽  
Cluster Detection ◽  
Detection Methods ◽  
Onset Date ◽  
Time Interval ◽  
Outbreak Response ◽  
Rule Based ◽  
Zip Code

Background: The Tennessee (TN) Department of Health (TDH) has been identifying clusters of reportable conditions using the Electronic Surveillance System for Early Notification of Community-Based Epidemics (ESSENCE), a cluster detection method using space-time scan permutation statistics based on patient ZIP code. CRE are reportable in Tennessee; isolate submission is required for carbapenemase (CP) production and resistance mechanism (eg, KPC gene) testing. The Council for Outbreak Response: Healthcare-Associated Infections (HAI) and Antimicrobial-Resistant (AR) Pathogens (CORHA) released proposed thresholds of reporting CRE to public health. Thresholds vary by healthcare facility type and regional epidemiology. The TDH HAI/AR program currently runs a daily automated SAS code using the CORHA reporting threshold to help public health identify suspect KPC clusters. We evaluated our rule-based CORHA method against 2 space-time statistic-based methods for KPC cluster detection in Tennessee. Methods: Simulations for each cluster detection method were performed using retrospective CP-CRE surveillance data for 2018. Simulations were conducted using (1) CORHA reporting thresholds by facility case count to flag clusters of 2 or more cases within 28 days, (2) ESSENCE using patient residence ZIP code and the earliest of collection date or symptom onset date as is used for other reportable conditions in Tennessee, and (3) a modified space-time statistical method using SaTScan in which reporting facility, rather than a geographic location, was used as space variable to detect within-facility clusters within 1–28 days. We compared the number and overlap of cases and clusters identified with each method. Univariate logistic regression with CORHA flagging as predictor and flagging by each ESSENCE or CORHA method as outcome variables, were used to compare cases tagged by each method pair, respectively. Results: Of 183 KPC CP-CRE cases, 54 (30.6%) were flagged as part of suspect clusters by at least 1 method. Simulations generated 16 alerts (36 cases) using CORHA, 10 clusters (25 cases) using modified SaTScan, and 10 clusters (20 cases) using standard ESSENCE protocol. Among KPC CP-CRE cases flagged by CORHA, 12 (33.3%) were also flagged by modified SaTScan and 2 (5%) by ESSENCE. A case flagged using CORHA method has 5.15 (95% CI, 2.10–12.64) times higher odds of also being flagged by the modified SaTScan method compared to cases not flagged by CORHA. Conclusions: An algorithm based on CORHA thresholds for reporting CRE to public health had strong agreement with modified SaTScan, a space-time method. We intend to explore the extension of the time interval for ESSENCE.Funding: NoneDisclosures: None

scholarly journals A Density-Based Spatial Flow Cluster Detection Method

2016 ◽  
Vol 1 ◽  
Author(s):  
Ran Tao ◽  
Jean-Claude Thill
Keyword(s):  
Detection Method ◽  
Cluster Detection

scholarly journals A semiparametric cluster detection method — a comprehensive power comparison with Kulldorff's method

2009 ◽  
Vol 8 (1) ◽  
pp. 73 ◽  
Author(s):  
Shihua Wen ◽  
Benjamin Kedem
Keyword(s):  
Detection Method ◽  
Cluster Detection ◽  
Power Comparison

An evaluation of SaTScan for the prospective detection of space-timeCampylobacterclusters in the North East of England

2013 ◽  
Vol 141 (11) ◽  
pp. 2354-2364 ◽  
Author(s):  
G. J. HUGHES ◽  
R. GORTON
Keyword(s):  
Detection Method ◽  
Space Time ◽  
Cluster Detection ◽  
Routine Laboratory ◽  
Epidemiological Investigation ◽  
Circular Window ◽  
North East ◽  
The North ◽  
Laboratory Surveillance ◽  
Sporadic Cases

SUMMARYCampylobacteriosis is the commonest cause of bacterial enteritis in England yet the epidemiology of apparently sporadic cases is not well understood. Here we evaluated the feasibility of applying a space-time cluster detection method to routine laboratory surveillance data in the North East of England by simulating prospective weekly space-time cluster detection using SaTScan as if it had been performed for 2008–2011. From the 209 simulated weekly runs using a circular window, 20 distinct clusters were found which contained a median of 30 cases (interquartile range 15–66) from a median population of ∼134 000 persons. This corresponds to detection of a new cluster every 10 weeks. We found significant differences in age, sex and deprivation score distributions between areas within clusters compared to those without. The results of this study suggest that space-time detection ofCampylobacterclusters could be used to find groups of cases amenable to epidemiological investigation.

scholarly journals Spatial multiresolution cluster detection method

2013 ◽  
Vol 6 (1) ◽  
pp. 65-77
Author(s):  
Lingsong Zhang ◽  
Zhengyuan Zhu
Keyword(s):  
Detection Method ◽  
Cluster Detection

Solid-phase immunoelectron microscopy for rapid diagnosis of enteroviruses

1984 ◽  
Vol 42 ◽  
pp. 226-227 ◽  
Author(s):  
K. Pegg-Feige ◽  
F. W. Doane
Keyword(s):  
Electron Microscopy ◽  
Cell Culture ◽  
Immunoelectron Microscopy ◽  
Detection Method ◽  
Solid Phase ◽  
Protein A ◽  
Plant Viruses ◽  
Rapid Diagnosis ◽  
Virus Diagnosis ◽  
Antiviral Antibody

Immunoelectron microscopy (IEM) applied to rapid virus diagnosis offers a more sensitive detection method than direct electron microscopy (DEM), and can also be used to serotype viruses. One of several IEM techniques is that introduced by Derrick in 1972, in which antiviral antibody is attached to the support film of an EM specimen grid. Originally developed for plant viruses, it has recently been applied to several animal viruses, especially rotaviruses. We have investigated the use of this solid phase IEM technique (SPIEM) in detecting and identifying enteroviruses (in the form of crude cell culture isolates), and have compared it with a modified “SPIEM-SPA” method in which grids are coated with protein A from Staphylococcus aureus prior to exposure to antiserum.

Detection method and stage in BRCA1/2 mutation carriers

2002 ◽  
Vol 38 (11) ◽  
pp. S163
Author(s):  
R Kaas
Keyword(s):  
Detection Method ◽  
Mutation Carriers

A Study on the Public Transit Transfer Behavior in New Rail Cities Based on Travelers’ Cognition

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Shenghui Zhao ◽  
Lishan Sun ◽  
Dewen Kong ◽  
Jinghan Cao ◽  
Yan Wang
Keyword(s):  
Public Transit ◽  
The Public ◽  
Transfer Behavior
Sign in / Sign up

Export Citation Format

Share Document