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Volume 21, Number 10—October 2015

Spatiotemporal Patterns of Schistosomiasis-Related Deaths, Brazil, 20002011

Francisco Rogerlândio Martins-Melo, Marta Cristhiany Cunha Pinheiro, Alberto Novaes Ramos, Carlos Henrique Alencar, Fernando Schemelzer de Moraes Bezerra, and Jorg HeukelbachComments to Author 
Author affiliations: Federal Institute of Education, Science and Technology of Ceará, Caucaia, Brazil (F.R. Martins-Melo); Federal University of Ceará, Fortaleza, Brazil (F.R. Martins-Melo, M.C.C. Pinheiro, A.N. Ramos Jr, C.H. Alencar, F.S.M. Bezerra, J. Heukelbach); James Cook University, Townsville, Queensland, Australia (J. Heukelbach)

Main Article


Significant spatiotemporal clusters of schistosomiasis-related deaths as defined by space-time scan statistic, by municipality of residence, Brazil, 2000–2011*

No. munis.
Radius, km
Death rate‡
No. observed/no. expected
p value
1 2001–2006 191 Paraiba, Pernambuco, Alagoas Northeast 179.3 4.0 2,150/214.6 3,257.52 12.96 <0.001
2 2006–2011 996 Sergipe, Bahia, Goiás, Minas Gerais, Espírito Santo, Rio de Janeiro Northeast, Central-West, Southeast 688.8 0.6 1,161/734.2 116.79 1.69 <0.001
3 2000–2005 27 São Paulo Southeast 38.7 0.5 572/427.9 23.16 1.36 <0.001

*Space-time scan statistic is described in the online technical appendix ( LLR, log- likelihood ratio test; munis, municipalities; RR, relative risk for the cluster compared with the rest of the country.
†The most likely or primary clusters (1) and secondary clusters (2 and 3) were detected by the LLR. The most likely cluster was defined as the one with the maximum LLR.
‡Average annual rate of death for schistosomiasis per 100,000 inhabitants during the cluster period.

Main Article

Page created: September 22, 2015
Page updated: September 22, 2015
Page reviewed: September 22, 2015
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