New incidence rates from egg negative to egg positive status by treatment strategies among initial negative subjects for Clonorchis sinensis (Cs), 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 confidence interval (CI) were estimated by Cox's proportional hazard model, adjusted for age and sex.2Age and sex adjusted p-values corrected by Bonferroni's multiple comparison method.3Mean numbers of every year.4Not available.