Volume 20, Number 4—April 2014
Dispatch
Clinical Malaria along the China–Myanmar Border, Yunnan Province, China, January 2011–August 2012
Table 2
Association between travel history and malaria for participants in a study of clinical malaria along the China–Myanmar border, Yunnan Province, China, January 2011–August 2012*
Travel history | No malaria | Plasmodium vivax |
Plasmodium falciparum |
|||||
---|---|---|---|---|---|---|---|---|
No. cases | Odds ratio (95% CI) | Adjusted odds ratio (95% CI)† | No. cases | Odds ratio (95% CI) | Adjusted odds ratio (95% CI)† | |||
None | 297 | 175 | 1 | 1 | 63 | 1 | 1 | |
Local‡ | 32 | 14 | 0.7 (0.4%–1.4%) | 0.9 (0.5%–1.8%) | 1 | 0.1 (0.0%–1.1%) | 0.8 (0.2%–2.0%) | |
In Myanmar§ | 24 | 19 | 1.3 (0.7%–2.5%) | 1.9 (0.8%–4.9%) | 20 | 3.9 (2.0%– 7.5%) | 15.0 (2.9%–175.0%) |
*Travel within 2 weeks before study participants sought care at a surveillance site health center or hospital. Twelve case-patients with missing travel histories were excluded from the analysis.
†Adjusted odds ratios were adjusted for age and sex obtained from logistic regression.
‡Included local travel within China and to border towns in Myanmar (<1 km inside Myanmar).
§Travel to areas within Myanmar (>1 km), excluding border towns.
1These authors contributed equally to this article.