Table 4 Knowledge of key messages among students by grade and study phase

% who were able to accurately state what germs are

24%

37%

p = 0.008

51%

56%

p = 0.27

% identifying “safe” sources of drinking water

79%

74%

P = 0.14

72%

75%

p = 0.49

% identifying “unsafe” sources of drinking water

46%

64%

p < 0.001

84%

91%

p = 0.03

% correctly identifying potential contamination in river

22%

54%

p < 0.001

74%

86%

p = 0.005

Number of observations

254

152

226

158