Table 4 Results of the matched logistic regressions evaluating the association between time since last screening attendance and breast cancer mortality, stratified by age at diagnosis/pseudodiagnosis.

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

Exposure

Category of exposure

Age 47–59 (n = 7834)

Age 60–64 (n = 4313)

Age 65–89 (n = 11,343)

All ages (n = 23 490)

OR (95% CI)

OR (95% CI) corrected for self-selectiona

OR (95% CI)

OR (95% CI) corrected for self-selectiona

OR (95% CI)

OR (95% CI) corrected for self-selectiona

OR (95% CI)

OR (95% CI) corrected for self-selectiona

Time between last screen and diagnosis/pseudodiagnosis

Never screened

1.00

–

1.00

–

1.00

–

1.00

–

0 ≤ 3 months

1.64 (1.39–1.94)

2.11 (1.76–2.52)

1.98 (1.52–2.57)

2.50 (1.91–3.28)

1.22 (0.93–1.60)

1.60 (1.21–2.13)

1.50 (1.33–1.69)

1.93 (1.67–2.22)

3 ≤ 6 months

0.19 (0.14–0.25)

0.24 (0.18–0.32)

0.18 (0.12–0.27)

0.26 (0.17–0.39)

0.05 (0.03–0.10)

0.07 (0.04–0.12)

0.14 (0.11–0.17)

0.18 (0.15–0.23)

6 ≤ 18 months

0.27 (0.23–0.32)

0.33 (0.28–0.40)

0.22 (0.17–0.29)

0.29 (0.22–0.38)

0.09 (0.07–0.12)

0.11 (0.08–0.15)

0.19 (0.17–0.22)

0.24 (0.21–0.28)

18 ≤ 36 months

0.41 (0.35–0.47)

0.51 (0.44–0.61)

0.38 (0.30–0.48)

0.48 (0.38–0.61)

0.22 (0.18–0.26)

0.27 (0.22–0.34)

0.32 (0.29–0.36)

0.40 (0.36–0.46)

36 ≤ 54 months

0.66 (0.51–0.85)

0.83 (0.64–1.07)

0.72 (0.51–1.01)

0.82 (0.58–1.16)

0.34 (0.27–0.42)

0.43 (0.34–0.54)

0.50 (0.43–0.58)

0.62 (0.53–0.73)

54 ≤ 72 months

0.80 (0.56–1.13)

1.01 (0.71–1.45)

0.95 (0.65–1.40)

1.16 (0.78–1.71)

0.35 (0.28–0.44)

0.51 (0.40–0.65)

0.54 (0.46–0.64)

0.74 (0.62–0.88)

>72 months

0.87 (0.57–1.35)

1.07 (0.70–1.64)

1.02 (0.72–1.44)

1.34 (0.94–1.90)

0.57 (0.50–0.64)

0.71 (0.62–0.82)

0.69 (0.62–0.76)

0.86 (0.76–0.98)

0–36 months

0.50 (0.44–0.56)

0.63 (0.55–0.73)

0.47 (0.39–0.57)

0.60 (0.49–0.74)

0.27 (0.23–0.32)

0.34 (0.29–0.41)

0.40 (0.37–0.44)

0.51 (0.46–0.57)

  1. aSelf-selection correction performed using our first method (variant of Duffy et al15), with the OR of 0.78 associated with participation in cervical screening.
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