Figure 3.

Intervention effects on Giardia infection intensity (cycle threshold [Ct] values) among children living in index households approximately 2.5 years after intervention initiation. Relative reduction of infection intensity is defined as CR – 1, where CR is the ratio of Ct values between arms. Nondetects were imputed as a Ct value of 40. Abbreviations: CI, confidence interval; Ct, cycle threshold; H, handwashing; S, sanitation; W, water treatment; WSH, combined water treatment, sanitation, and handwashing.