Re-infection rates changes from Clonorchis sinensis (Cs) egg positive to negative status by treatment and egg positive again by treatment strategies among initial Cs positive subjects, 2001–2004.

MT2, mass treatment every 2 year; MT1, mass treatment every year; ST1, selective treatment every year; ST1R, selective treatment and reservoir control every year; ST6M, selective treatment every 6 month; ST2-mod, selective treatment every 2 year; ST1-mod, selective treatment every year.1The relative risk (RR) and 95% confidence interval (CI) in 2004 recurrence rates were estimated by Cox's proportional hazard model, adjusted for age and sex.2Age and sex adjusted p-value corrected by Bonferroni's multiple comparison method.3Mean numbers for each year.4Not available.