Table 2 Results of the matched logistic regression evaluating the association between screening attendance and breast cancer mortality.

From: A case-control study to evaluate the impact of the breast screening programme on mortality in England

Exposure

Category of exposure

Controls (n = 15,202)

Cases (n = 8288)

OR (95% CI)

OR (95% CI) corrected for self-selectiona

OR (95% CI) corrected for self-selectionb

Ever screened

No

1803

1 741

1.00

–

–

Yes

13,399

6 547

0.49 (0.45–0.53)

0.62 (0.56–0.69)

0.63 (0.55–0.71)

  1. aSelf-selection correction performed using our first method (variant of Duffy et al.15), with the OR of 0.78 associated with participation in cervical screening.
  2. bSelf-selection correction performed using our second method (Duffy et al.15).
Back to article page