[Estimation of risk areas for hepatitis A].
This study estimated hepatitis A risk areas in a region of Duque de Caxias, Rio de Janeiro State, Brazil. A cross-sectional study consisting of a hepatitis A serological survey and a household survey were conducted in 19 census tracts. Of these, 11 tracts were selected and 1,298 children from one to ten years of age were included in the study. Geostatistical techniques allowed modeling the spatial continuity of hepatitis A, non-use of filtered drinking water, time since installation of running water, and number of water taps per household and their spatial estimation through ordinary and indicator kriging. Adjusted models for the outcome and socioeconomic variables were isotropic; risk maps were constructed; cross-validation of the four models was satisfactory. Spatial estimation using the kriging method detected areas with increased risk of hepatitis A, independently of the urban administrative area in which the census tracts were located.
Braga
Ricardo Cerqueira Campos
RC
Serviço de Epidemiologia, Hospital dos Servidores do Estado, Rio de Janeiro, Brasil. rbiobraga@globo.com
Valencia
Luís Iván Ortiz
LI
Medronho
Roberto de Andrade
Rde A
Escosteguy
Claudia Caminha
CC
D001938:Brazil / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D040362:Geographic Information Systems; D006306:Health Surveys; D006506:Hepatitis A / Q000453:epidemiology* / Q000209:etiology; D030041:Hepatitis A virus / Q000302:isolation & purification; D006801:Humans; D007223:Infant; D008297:Male; D011156:Population Density; D012111:Residence Characteristics; D018570:Risk Assessment / Q000379:methods; D016036:Seroepidemiologic Studies; D012959:Socioeconomic Factors; D014881:Water Supply / Q000592:standards