Table 2

 Prevalence of preinvasive lesions (dysplasia II–III and CIS) in 2907 evaluable biopsy samples analysed from a biopsy related perspective

Evaluable biopsies (n)Dyplasia II–IIICISTotal
RR (95% CI), relative risk (with 95% confidence intervals).
Arm B (WLB)137614 (1.0%)5 (0.4%)19 (1.4%)
Arm A (WLB+AFB)153127 (1.8%)7 (0.5%)34 (2.2%)
RR (95% CI)1.73 (0.92 to 3.26)1.26 (0.42 to 3.75)1.61 (0.93 to 2.79)