Table 3.

ORs of the association between cervical cancer and screening participation

Age at invitationCases screened Y/NaControls screened Y/NaCrude ORbCorrected OR (95% CI)c
Overall366/4943,469/1,8130.370.53 (0.46–0.62)
25–2911/1877/770.650.95 (0.36–2.49)
30–3450/75422/3510.540.79 (0.53–1.16)
35–3961/80529/3770.500.73 (0.50–1.06)
40–4444/87527/2960.260.38 (0.26–0.58)
45–4950/66514/2160.280.41 (0.27–0.62)
50–5453/57486/1830.300.44 (0.29–0.68)
55–5949/63497/1650.230.34 (0.22–0.52)
60–6440/39350/1280.330.49 (0.28–0.84)
65–698/967/200.330.49 (0.10–2.41)
  • aNumber of cases and controls with invitation and exposed to screening yes/no.

  • bEstimated using conditional logistic regression.

  • cCorrected using self-selection bias factor 1.29 and attendance rate 0.71.