Table 1. Water and environmental factors associated with cholera, Nabua, Camarines Sur, Philippines, 10 March to 28 June 2012.
| Factors | Case (n = 55) | Control (n = 110) | Odds ratio | P-value |
|---|---|---|---|---|
| Drinking from free-flow wells | 20 (37%) | 16 (15%) | 3.62 | 0.001 |
| Drinking from open dug wells | 25 (45%) | 43 (39%) | 2.81 | 0.028 |
| Toilets located within 20 m of water sources | 38 (69%) | 50 (45%) | 2.68 | 0.002 |
| Drinking from piped water system | 8 (14%) | 48 (44%) | 0.22 | < 0.001 |
| Female (sex) | 32 (58%) | 63 (57%) | 1.04 | 0.960 |
| Boiling water | 16 (29%) | 35 (32%) | 0.88 | 0.860 |
| Owning a toilet | 41 (74%) | 94 (86%) | 0.50 | 0.140 |
| Using ice in drinking-water | 40 (77%) | 78 (71%) | 1.09 | 0.950 |
| Washing hands after using toilet | 54 (98%) | 110 (100%) | 0.00 | 0.720 |