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Volume 10, Number 12—December 2004

Research

Risk Factors for Alveolar Echinococcosis in Humans

Petra Kern*Comments to Author , Andrea Ammon†, Martina Kron*, Gabriele Sinn†‡, Silvia Sander*, Lyle R. Petersen†§, Wilhelm Gaus*, and Peter Kern*
Author affiliations: *University of Ulm, Ulm, Germany; †Robert Koch-Institut, Berlin, Germany; ‡Health Authorities (Gesundheitsamt) of Charlottenburg-Wilmersdorf, Berlin, Germany; §Centers for Disease Control and Prevention, Fort Collins, Colorado; USA

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Table

Characteristics of the study population

Demographic characteristics Patients
N = 40
Controls
N = 120
n (%) n (%)
Age (in y) at time of interviewa
<20 1 (2)
20–29 2 (5)
30–39 4 (10)
40–49 2 (5)
50–59 10 (25)
60–69 10 (25)
70–79 9 (23)
>79 2 (5)
Sex
Male 18 (45) 41 (34)
Female 22 (55) 78 (65)
Data not available 1 (1)
School education
Secondary school 28 (70) 74 (62)
Intermediate level 7 (18) 29 (24)
Grammar school 4 (10) 14 (11)
Left school early 0 1 (1)
Still in school 1 (2) 1(1)
Data not available 0 1(1)
Completed vocational training
  Yes 27 (68) 87 (73)
  No 13 (32) 30 (25)
  Data not available 3 (2)
Population of hometowna
  <200 4 (10)
  200–<600 10 (25)
  600–<7,000 21 (53)
  7,000–<20,000 2 (5)
  >20,000 3 (7)
House at town outskirts
Yes 26 (65) 85 (71)
No 14 (35) 34 (28)
Data not available 1 (1)
Duration of residence at assumed place of exposure
>30 y 31 (78)
20–29 y 5 (13)
10–19 y 3 (7)
<10 y 1 (2)

aControls were matched to patients by age and hometown.

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