MyJournals Home  

RSS FeedsComparison of covariate adjustment methods using space-time scan statistics for food animal syndromic surveillance (BMC Veterinary Research)

 
 

18 november 2013 14:01:53

 
Comparison of covariate adjustment methods using space-time scan statistics for food animal syndromic surveillance (BMC Veterinary Research)
 


Background: Abattoir condemnation data show promise as a rich source of data for syndromic surveillance of both animal and zoonotic diseases. However, inherent characteristics of abattoir condemnation data can bias results from space-time cluster detection methods for disease surveillance, and may need to be accounted for using various adjustment methods. The objective of this study was to compare the space-time scan statistics with different abilities to control for covariates and to assess their suitability for food animal syndromic surveillance. Four space-time scan statistic models were used including: animal class adjusted Poisson, space-time permutation, multi-level model adjusted Poisson, and a weighted normal scan statistic using model residuals. The scan statistics were applied to monthly bovine pneumonic lung and `parasitic liver` condemnation data from Ontario provincial abattoirs from 2001--2007. Results: The number and space-time characteristics of identified clusters often varied between space-time scan tests for both `parasitic liver` and pneumonic lung condemnation data. While there were some similarities between isolated clusters in space, time and/or space-time, overall the results from space-time scan statistics differed substantially depending on the covariate adjustment approach used. Conclusions: Variability in results among methods suggests that caution should be used in selecting space-time scan methods for abattoir surveillance. Furthermore, validation of different approaches with simulated or real outbreaks is required before conclusive decisions can be made concerning the best approach for conducting surveillance with these data.


 
92 viewsCategory: Medicine, Zoology
 
Bovine brucellosis trends in Malaysia between 2000 and 2008 (BMC Veterinary Research)
Variation of serum selenium concentrations in German sheep flocks and implications for herd health management consultancy (Acta Veterinaria Scandinavica)
 
 
blog comments powered by Disqus


MyJournals.org
The latest issues of all your favorite science journals on one page

Username:
Password:

Register | Retrieve

Search:

Zoology


Copyright © 2008 - 2024 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Nachrichten