Table 4 Relative risk (hazard ratios) of CIN2+ and 95% CI, adjusted for screening programme and interval between index and last screening episode

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

Factors

Level

Relative risk (95% CI)

No. of previous screening episodes

1 (referent)

1

 

2

1.10 (0.95–1.28)

 

3

0.96 (0.78–1.19)

 

4

0.70 (0.51–0.97)

 

5

0.65 (0.45–0.92)

Age

25–49 years (referent)

1

 

50–64 years

0.29 (0.24–0.35)

  1. CI=confidence interval; CIN=cervical intraepithelial neoplasia.
  2. Test for trend on risks referring to n screening episodes: P-value>0.5.
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