Table 1.
Nonbiopsy and incorrect selection of biopsy site according to the colposcopic impression formulated by the committee.
| Committee decision on biopsy according to colposcopic impression | Total | |||||
|---|---|---|---|---|---|---|
| Biopsy: no (negative) |
Biopsy: yes | |||||
| G1 | G2 | Cancer | Subtotal | |||
| Colposcopist decision on biopsy | ||||||
| No | 803 | 64 | 12 | 0 | 76 | 879 |
| Yes, incorrect site | NA | 58 | 85 | 2 | 145 | 145 |
| Yes, correct site | NA | 468 | 1024 | 234 | 1726 | 1726 |
| Yes, subtotal | 200 | 526 | 1109 | 236 | 1871 | 2071 |
| Total | 1003 | 590 | 1121 | 236 | 1947 | 2950 |
| Nonbiopsy rate | NA | 0.11 (0.08–0.13) | 0.01 (0.01-0.02) | 0.00 (0.00–0.02) | 0.04 (0.03–0.05) | NA |
| Incorrect biopsy site rate | NA | 0.10 (0.08–0.12) | 0.08 (0.06–0.09) | 0.01 (0.00–0.03) | 0.07 (0.06–0.09) | NA |
| Total biopsy failure rate | NA | 0.21 (0.17–0.24) | 0.09 (0.07–0.11) | 0.01 (0.00–0.03) | 0.11 (0.10–0.13) | NA |
G1: abnormal, grade 1; G2: abnormal, grade 2; Cancer: suspected invasive cancer.