Table 2.
Accuracy rates for transformation zone, colposcopic diagnosis, and biopsy
| All participants | Annual colposcopy examination number | |||
|---|---|---|---|---|
| ≤ 50 | > 50 | P | ||
| Transformation Zone | ||||
| Overall accuracy rate | 0.47 (0.45, 0.49) | 0.45 (0.42, 0.48) | 0.49 (0.46, 0.53) | 0.034 |
| Accuracy rate for Type I/II | 0.57 (0.54, 0.61) | 0.56 (0.52, 0.60) | 0.59 (0.54, 0.64) | 0.163 |
| Accuracy rate for Type III | 0.22 (0.19, 0.25) | 0.19 (0.15, 0.23) | 0.26 (0.22, 0.31) | 0.015 |
| Colposcopic Diagnosis | ||||
| Overall accuracy rate | 0.53 (0.51, 0.55) | 0.50 (0.48, 0.53) | 0.56 (0.53, 0.59) | 0.005 |
| Accuracy rate for Benign/normal | 0.44 (0.40, 0.48) | 0.42 (0.37, 0.48) | 0.47 (0.41, 0.53) | 0.138 |
| Accuracy rate for LSIL | 0.54 (0.51, 0.58) | 0.54 (0.49, 0.58) | 0.55 (0.50, 0.60) | 0.346 |
| Accuracy rate for HSIL+ | 0.59 (0.56, 0.63) | 0.54 (0.49, 0.59) | 0.65 (0.60, 0.71) | 0.001 |
| Over diagnosis rate | 0.22 (0.21, 0.24) | 0.22 (0.19, 0.24) | 0.23 (0.21, 0.25) | 0.213 |
| Miss diagnosis rate | 0.15 (0.14, 0.17) | 0.16 (0.15, 0.18) | 0.14 (0.12, 0.16) | 0.027 |
| Biopsy | ||||
| Accuracy rate | 0.73 (0.71, 0.74) | 0.71 (0.69, 0.73) | 0.75 (0.72, 0.77) | 0.013 |
| Over biopsy rate | 0.09 (0.07, 0.10) | 0.09 (0.07, 0.10) | 0.08 (0.07, 0.10) | 0.269 |
| Miss biopsy rate | 0.15 (0.13, 0.16) | 0.16 (0.14, 0.18) | 0.14 (0.11, 0.16) | 0.070 |
Data are presented as means with 95% confidence intervals
Abbreviations LSIL, Low-grade squamous intraepithelial lesion; HSIL+, High-grade squamous intraepithelial lesion or worse