Volume 5, Number 6—December 1999
Dispatch
Computer-Generated Dot Maps as an Epidemiologic Tool: Investigating an Outbreak of Toxoplasmosis
Table
Linear trend analysis of acute and nonacute infections with Toxoplasma gondii among screened pregnant women, by degree of exposure to Humpback Reservoir water
Rank of exposure | Exposure score | Infected (cases) | Never infected (controls) | Odds ratio (relative to baseline) | Trend test p valuea | |
---|---|---|---|---|---|---|
Acute | No | 1 | 4 | 983 | 1.00 | |
(recent | ||||||
infection) | ||||||
Intermediate | 2 | 10 | 1,078 | 2.28 | ||
High | 3 | 22 | 1,497 | 3.61 | 0.01 | |
Nonacute | No | 1 | 64 | 983 | 1.00 | |
(past | ||||||
infection) | ||||||
Intermediate | 2 | 71 | 1,078 | 1.01 | ||
High | 3 | 81 | 1,497 | 0.83 | 0.25 |
aExtended Mantel-Haenszel chi-square, Schlesselmann JJ. Case-control studies, New York, Oxford University Press, 1982.
Page created: December 16, 2010
Page updated: December 16, 2010
Page reviewed: December 16, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.