Table 5. Magnitude and direction of associations between most important variables from random forest analysis and using basic drinking water which is always available (Outcome 2), adjusted for wealth, by site. Associations are odds ratios and 95% confidence intervals comparing the highest quartile/category to the lowest quartile/category of each variable. When, in tests for linearity, no difference was seen between adjacent categories, quartiles were collapsed and we provide ORs comparing the highest to lowest category (detailed descriptions of variable specification are provided in supplemental tables 6 - 9). Colors indicate direction and strength of association: red = decreased basic drinking water use; blue = increased basic drinking water use. Grey indicates association untested because the variable was not identified as an important predictor in random forests. White cells indicate the association was tested but was not statistically significant.