Table 2 Detection rate (per 10−4 person-years) of CIN2+ by age class

From: Do women ⩾50 years of age need as much screening as women <50 years after they have had negative screening results?

Age class (years)

No. of cases ( N =1110)

Person-years ( N =1 714 550)

DR (95% CI) (per 10 −4 person-years)

25–29

205

145 296

14.11 (12.30–16.18)

30–34

252

229 902

10.96 (9.69–12.40)

35–39

217

245 243

8.85 (7.75–10.11)

40–44

192

259 391

7.40 (6.43–8.53)

45–49

111

265 922

4.17 (3.47–5.03)

50–54

57

249 725

2.28 (1.76–2.96)

55–59

52

213 905

2.43 (1.85–3.19)

60–64

24

105 166

2.28 (1.53–3.41)

  1. CI=confidence interval; CIN=cervical intraepithelial neoplasia; DR=detection rate.
  2. Score test for trend of rates: P-value<0.0001.
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