Table 6
Age dependent effect of screening
| ⩽28 years | 29–33 years | 34–53 years | 54–61 years | ⩾ = 62 yrs | All | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of histological lesions detected for each 1000 cervical smears taken in the same calendar year, 1990–2000. Bold numbers indicate age categories invited for the population based screening programme. | ||||||||||||||||||
| *In 1996, the CISOE-A classification with formal reporting and referral was introduced and, in addition, three year interval screening for women 34–55 years was changed to five year interval screening for women 30–60 years; †p value for linear test for trend. | ||||||||||||||||||
| CIN, cervical intraepithelial neoplasia; SCC, squamous cell carcinoma. | ||||||||||||||||||
| CIN1 | CIN2–3 | SCC | CIN1 | CIN2–3 | SCC | CIN1 | CIN2–3 | SCC | CIN1 | CIN2–3 | SCC | CIN1 | CIN2–3 | SCC | CIN1 | CIN2–3 | SCC | |
| 1990 | 3.4 | 5.2 | 0.1 | 3.5 | 6.4 | 0.2 | 3.1 | 1.2 | 0.3 | 2.8 | 1.1 | 1.3 | 3.7 | 1.4 | 5.4 | 3.2 | 4.1 | 0.4 |
| 1991 | 3.5 | 5.1 | 0.2 | 3.9 | 5.3 | 0.3 | 2.3 | 1.1 | 0.3 | 2.1 | 1.9 | 1.0 | 7.1 | 1.2 | 4.7 | 2.9 | 3.7 | 0.4 |
| 1992 | 3.9 | 5.0 | 0.1 | 4.6 | 7.8 | 0.4 | 3.8 | 1.1 | 0.6 | 4.3 | 3.1 | 0.4 | 4.3 | 1.3 | 5.4 | 3.9 | 5.0 | 0.6 |
| 1993 | 5.9 | 6.3 | 0.1 | 5.9 | 7.0 | 0.7 | 4.0 | 0.8 | 0.4 | 5.8 | 3.5 | 1.2 | 4.9 | 3.2 | 5.3 | 4.6 | 5.0 | 0.6 |
| 1994 | 5.8 | 6.4 | 0.1 | 6.2 | 8.0 | 0.3 | 3.3 | 0.5 | 0.3 | 3.2 | 1.9 | 0.7 | 3.3 | 4.0 | 7.0 | 4.1 | 4.5 | 0.5 |
| 1995 | 6.5 | 6.8 | 0.3 | 5.8 | 9.5 | 0.5 | 4.0 | 1.9 | 0.5 | 3.9 | 3.1 | 0.7 | 5.0 | 2.0 | 6.4 | 4.6 | 5.7 | 0.6 |
| 1996* | 6.8 | 9.7 | 0.2 | 3.7 | 7.1 | 0.2 | 3.5 | 2.2 | 0.5 | 1.1 | 1.2 | 0.1 | 3.4 | 2.7 | 6.8 | 3.5 | 4.9 | 0.5 |
| 1997 | 8.4 | 11.5 | 0.3 | 5.2 | 10.1 | 0.4 | 4.2 | 4.4 | 0.4 | 1.6 | 1.9 | 0.1 | 2.5 | 0.8 | 5.9 | 4.2 | 6.1 | 0.4 |
| 1998 | 9.2 | 10.5 | 0.6 | 6.6 | 12.7 | 0.4 | 4.2 | 4.8 | 0.3 | 1.8 | 1.7 | 0.2 | 3.6 | 2.7 | 5.0 | 4.6 | 6.9 | 0.4 |
| 1999 | 8.5 | 8.5 | 0.0 | 5.0 | 14.2 | 0.5 | 3.9 | 4.0 | 0.5 | 1.7 | 1.5 | 0.0 | 4.2 | 4.2 | 2.8 | 4.0 | 6.7 | 0.4 |
| 2000 | 9.3 | 11.6 | 0.6 | 7.2 | 14.1 | 0.3 | 3.5 | 5.0 | 0.4 | 1.8 | 2.1 | 0.5 | 2.2 | 3.3 | 8.7 | 3.9 | 6.4 | 0.6 |
| p Value† | <0.001 | <0.001 | 0.082 | 0.040 | <0.001 | 0.569 | 0.080 | 0.003 | 0.449 | 0.101 | 0.531 | 0.008 | 0.057 | 0.096 | 0.610 | 0.180 | <0.001 | 0.508 |
