Populations at Risk for Alveolar Echinococcosis, France
Martine Piarroux, Renaud Piarroux, Jenny Knapp, Karine Bardonnet, Jérôme Dumortier, Jérôme Watelet, Alain Gerard, Jean Beytout, Armand Abergel, Solange Bresson-Hadni, Jean Gaudart
, and for the FrancEchino Surveillance Network
Author affiliations: Aix-Marseille University, Marseille, France (M. Piarroux, R. Piarroux, J. Gaudart); University College London, London, UK (J. Gaudart); Franche-Comté University–University Hospital, Besançon, France (K. Bardonnet, J. Knapp, S. Bresson-Hadni); University Hospital, Clermont-Ferrand, France (A, Abergel, J. Beytout); Hospices Civils de Lyon, Lyon, France (J. Dumortier); University Hospital Nancy, Nancy, France (A. Gerard, J. Watelet)
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Figure 2
Figure 2. . Significant results by multivariate analysis using classification and regression tree analysis to determine risk for alveolar echinoccosis in France, 1982–2007. Black indicates patients; gray indicates controls; class number is enclosed in a square. When the last step of analysis was not significant, terminal classes were aggregated at the upper level. Patients appeared predominant in 4 terminal classes: class 1 represented persons who live in an urban (or semiurban) environment in a département (second largest administrative area in France) where persons are at risk for alveolar echinococcosis (DAR) and do not have a kitchen garden, class 2, persons who live in similar areas but have a kitchen garden; class 3, nonfarmers who live in rural areas in a DAR; and class 4, farmers who live in the same environment; class 5, mostly persons who live in départements (second largest administrative areas in France) where humans are not at risk.
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