Table 2 Risk factors for E. histolytica infection in Hanam province, Vietnam (multivariable conditional logistic regression analysis).
Risk factors | Matched OR | 95% CI | P-value |
|---|---|---|---|
Household's socioeconomic status (versus good) | Â | Â | Â |
   - average | 4.3 | 1.3-14.0 | 0.02 |
   - poor | 2.2 | 0.6-7.4 | 0.22 |
Household's sanitary conditions (versus good) | Â | Â | Â |
   - average | 0.8 | 0.3-2.3 | 0.68 |
   - poor | 1.6 | 0.6-4.6 | 0.38 |
Household with tap water (yes versus no) | 1.3 | 0.5-3.1 | 0.57 |
Close contact with domestic animals in household (yes versus no) | 5.9 | 1.9-18.9 | 0.003 |
Handling animal excreta in field work (yes versus no) | 0.2 | 0.1-0.7 | 0.01 |
Direct contact with Nhue river water during field work (yes versus no) | 0.4 | 0.1-1.1 | 0.07 |
Use of Nhue river water to irrigate fields (yes versus no) | 3.7 | 0.4-33.1 | 0.24 |
Washing hands with soap after field work (versus frequently) | Â | Â | Â |
   - sometimes | 1.7 | 0.5-5.8 | 0.40 |
   - rarely | 3.4 | 1.1-10.0 | 0.03 |