Risk of cervical cancer at age 65–83 y by screening history at age 50–64 y and histological type.

a Adequate negative: last three tests were negative (at least one at age 60–64 y) and no high-grade (HSIL) or worse cytology since age 50. Sub-optimal but negative: not satisfying “adequate negative” but with either at least one negative test and no abnormal tests, or with three consecutive negatives and no HSIL but with the last test before age 60. Abnormal: HSIL cytology or a low-grade result (ASC-US or LSIL) not followed by three negatives. No screening: no test at age 50–64 y.