<i>Schistosoma japonicum</i> infection in humans in intervention and control groups^*.

*CI denote 95% confidence intervals. §As compared with 2008 in the intervention group, there was a statistically significant change in the rate of infection in 2010 and 2011 (P<0.001), and there was no statistically significant change in 2009 (P = 0.101). #As compared with 2008 in the control group, there was no statistically significant change in the rate of infection from 2009 to 2011 (P = 0.328, P = 0.204, P = 0.055, respectively).