ap<0.05 compared between incomplete TZ and TZ type I.
bp<0.05 compared with each AUC with 0.5.
PPV: positive predictive value. NPV: negative predictive value. AUC: area under the curve. ASCUS: atypical squamous cells of undetermined significance. LSIL: low-grade squamous intraepithelial lesion. ASC-H: atypical squamous cells cannot exclude high-grade squamous intraepithelial lesion. TS: TruScreen. TZ: transformation zone. CIN: cervical intraepithelial neoplasia.