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