. 2013 Mar 7;7(3):e2098. doi: 10.1371/journal.pntd.0002098

Table 2. S. japonicum infection prevalence and intensity at follow-up.

	Cohort 1^*		Cohort 2^†
	T₁	T₂	T₁	T₂
S. japoincum infection prevalence^‡	33.1	10.3	7.7	7.8
Mean S. japonicum infection intensity^‡	8.7	3.1	4.3	1.3

Cohort 1 is composed of people from 10 villages where schistosomiasis is endemic. Participants were tested for S. japonicum infection in 2000 (T₀), 2002 (T₁) and 2006 (T₂).

^†

Cohort 2 is composed of people from 27 villages in two counties where schistosomiasis reemerged following reduction of S. japonicum infection prevalence below 1%. Participants were tested for S. japonicum infection in 2007 (T₀), 2008 (T₁) and 2010 (T₂).

^‡

Infection prevalence and intensity were estimated for the source population, accounting for the stratified sampling used in enrolling cohort participants. Each individual in the cohort was assigned a weight equal to the inverse probability of being sampled.