Table 3 Results of the matched logistic regressions evaluating the association between time since last 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

Time between last screen and diagnosis/pseudodiagnosis

Never screened

1803

1741

1.00

–

–

0 ≤ 3 months

925

1383

1.50 (1.33–1.70)

1.93 (1.68–2.22)

1.91 (1.64–2.24)

3 ≤ 12 months

2172

407

0.15 (0.13–0.18)

0.19 (0.17–0.23)

0.19 (0.15–0.24)

12 ≤ 24 months

2573

788

0.24 (0.22–0.27)

0.31 (0.27–0.35)

0.31 (0.26–0.36)

24 ≤ 36 months

2345

992

0.35 (0.32–0.40)

0.45 (0.39–0.51)

0.45 (0.38–0.52)

36 ≤ 48 months

639

344

0.49 (0.42–0.57)

0.61 (0.51–0.73)

0.63 (0.52–0.75)

48 ≤ 60 months

429

245

0.54 (0.45–0.66)

0.70 (0.57–0.86)

0.69 (0.55–0.86)

>60 months

4316

2388

0.67 (0.60–0.74)

0.85 (0.75–0.96)

0.86 (0.74–0.99)

  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