Table 5 Annual incidence of new cases of CIN3+ in women with a screening interval of less than 5 years following a normal smear

From: Cervical HPV infection and neoplasia in a large population-based prospective study: the Manchester cohort

Age at mid-point of interval No. of CIN3+ diagnosed at next smear Woman-years from last smear to next smear Incidence per 1000 per year Cumulative CIN3+ risk at start of interval (%)
15–19 8 5129 1.56 0.0
20–24 50 22 487 2.22 0.8
25–29 94 23 074 4.07 1.9
30–34 72 19 623 3.67 3.9
35–39 42 17 239 2.44 5.8
40–44 23 15 065 1.53 7.0
45–49 10 11 785 0.85 7.8
50–54 7 9257 0.76 8.2
55–59 4 6861 0.58 8.6
60–64 1 5253 0.19 8.9
65–69 2 1437 1.39 9.0