gutters 0.28 Lack cover 0.51 Defective tap 0.68 Drainage 0.66 Pollution 0.22 Roof type 0.07 Tank opening 0.96 0.44 0.68 0.15 1 0.58 62% 6% 75% 19% 38% 0% 0% 56% 0.70 0.28 0.71 0.64 0.25 - - 0.46 Mean risk score: 58% 45% 32% a Wilcox rank sum test for difference between mean ...