Volume 10, Number 12—December 2004
Research
Risk Factors for Alveolar Echinococcosis in Humans
Petra Kern*
, Andrea Ammon†, Martina Kron*, Gabriele Sinn†‡, Silvia Sander*, Lyle R. Petersen†§, Wilhelm Gaus*, and Peter Kern*
, Andrea Ammon†, Martina Kron*, Gabriele Sinn†‡, Silvia Sander*, Lyle R. Petersen†§, Wilhelm Gaus*, and Peter Kern*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.
