Fig. 3

Mean response rates (1–3) and estimated diarrhoea rates (4–6) over all eight rounds to the SMS Survey, broken down by treatment. Legend: 1 and 4: daily (circle points) Vs Fortnightly (square points) surveys; 2 and 5: 3-Question (circle points) Vs 1-Question (square points) surveys; and 4 and 6: Incentive (circle points) Vs No Incentive (square points). Trend lines are displayed with corresponding 95%CI