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Ten year hazard ratios of developing cervical cancer after negative follow-up test results following histologically confirmed cervical intraepithelial neoplasia (CIN), for grades 1 and 2 lesions compared with grade 3
| Grade of CIN | Woman years at risk | No of cases | Hazard ratio* (95% CI) |
|---|---|---|---|
| 1 | 14 482 | 6 | 1.3 (0.4 to 3.7) |
| 2 | 13 752 | 6 | 1.4 (0.5 to 4.2) |
| 3 | 28 722 | 8 | 1 (reference) |
| Total | 56 956 | 20 | — |
*Corrected for year in follow-up.
