Table 4.

ORs of the association between breast cancer death and attending screening by category of age at index invitation

Age groupNumber of cases/controlsIndex invitationIndex period
OR (95% CI)OR (95% CI) corrected for self-selectionaOR (95% CI)OR (95% CI) corrected for self-selectiona
50–69653/3,2390.58 (0.48–0.70)0.67 (0.52–0.86)0.53 (0.43–0.64)0.61 (0.47–0.79)
50–75728/3,6060.49 (0.41–0.58)0.57 (0.44–0.72)0.45 (0.37–0.54)0.52 (0.41–0.67)
55–74547/2,7020.46 (0.38–0.57)0.53 (0.41–0.69)0.41 (0.33–0.51)0.47 (0.36–0.62)
70–7577/3750.13 (0.07–0.23)0.15 (0.08–0.27)0.14 (0.08–0.25)0.16 (0.09–0.29)

NOTE: CI calculated using conditional logistic regression.

  • aSelf-selection bias factor: 1.11.