Fig. 4

Spatial odds ratio for the prevalence of (a) type of toilet, (b) house floor (c) household susceptibility to flooding during rain. Crude odds ratio surface estimated by a GAM model. Black dots represents (a) latrine or no toilet, (b) wood or ground floor, (c) flooding during rain, and white dots represents (a) flushed toilet, (b) tiled floor, (c) no flooding during rain. The darker areas are where odds ratio is higher than 2