Table 4. 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.
| Endemicity | Treatment Strategies | No. of Cs Egg Negative Changed First Treatment | Recurrence Rates (%) | RR (95% CI) 1 | p-Value 2 | |
| 2003 | 2004 | |||||
| Heavy | MT2 | 782 | — 4 | 5.1 | 0.4 (0.3–0.7) | <0.01 |
| MT1 | 322 | 7.0 | 5.2 | 0.4 (0.2–0.8) | 0.04 | |
| ST1 | 348 | 9.2 | 12.5 | 1.0 (reference) | Reference | |
| ST1R | 487 | 4.2 | 10.8 | 0.8 (0.5–1.2) | 1.0 | |
| ST6M 3 | 639 | 7.4 | 4.3 | 0.4 (0.2–0.6) | <0.01 | |
| Moderate | ST2-mod | 279 | — 4 | 0.7 | 0.1 (0.01–0.2) | <0.01 |
| ST1-mod | 514 | 4.1 | 1.6 | 0.1 (0.06–0.3) | <0.01 |
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.
1
The 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.
2
Age and sex adjusted p-value corrected by Bonferroni's multiple comparison method.
3
Mean numbers for each year.
4
Not available.