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.

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)

^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.