Table 3.

OR for ER-negative tumor development by age group

Age groupBreast cancersER/PR-negative tumors (%)OR (95% CI) of ER/PR-negative tumor with ≥1 y* statin use
<407825 (32)0
40-4935062 (18)0.77 (0.17-3.52)
50-59564128 (23)0.76 (0.35-1.69)
60-6953583 (16)0.70 (0.36-1.35)
70-7942449 (12)0.62 (0.29-1.32)
>8019027 (14)0.47 (0.13-1.67)
All ages2,141374 (17)0.63 (0.43-0.92)
  • NOTE: P values based on OR from a 2 × 2 table.

  • * Referenced to statin users <1 y (including nonusers) within each age group.

  • No patients under 40 used statins >1 y.

  • Age-adjusted OR of developing an ER/PR-negative tumor referenced to statin users <1 y (including nonusers).