Bivariate analysis of factors associated with Schistosoma hematobium, Blantyre schistosomiasis survey, Malawi, 2006.

*Base population are the 657 pupils with knowledge of open water source.?Infection characterized by parasitological examination of urine.?Odds ratios and 95% confidence intervals are weighted and account for stratification and clustering.

* 本研究的基础人群为657名知晓露天水源（open water source）的小学生。
* 本次研究涉及的感染以尿液寄生虫学检查作为诊断依据。
* 本报告中的比值比（Odds Ratio）与95%置信区间（95% Confidence Interval）均经过加权处理，且校正了分层与聚类效应。