Table 4 Age-adjusted incidence rate (AAIR) of invasive and in situ breast cancer according to hormone therapy (HT) use at follow-up in 2000-2001 among menopausal women in the California Teachers Study
Period | Never HT | Past HT | Current E | Current EP |
|---|---|---|---|---|
| Â | AAIR (95% CI) | AAIR (95% CI) | AAIR (95% CI) | AAIR (95% CI) |
| Â | Invasive breast cancer | Â | ||
2001-02 | 369.3 (285.6-452.9) | 561.1 (432.4-689.8) | 534.9 (424.7-645.1) | 665.8 (565.9-765.7) |
2003-05 | 343.7 (272.8-414.5) | 340.0 (265.6-414.4) | 406.4 (324.7-488.0) | 461.9 (392.5-531.4) |
% change | -6.9% P = 0.33 | -39.4% P = 0.003 | -24.0% P = 0.030 | -30.6% P = 0.001 |
| Â | In Situ breast cancer | Â | ||
2001-02 | 86.6 (44.0-129.1) | 100.5 (32.4-168.6) | 137.7 (83.2-192.3) | 135.0 (95.2-174.9) |
2003-05 | 107.2 (63.1-151.3) | 99.5 (60.3-138.8) | 123.6 (67.3-179.9) | 115.5 (78.1-152.8) |
% change | 23.8% P = 0.26 | -1.0% P = 0.49 | -10.2% P = 0.35 | -14.4% P = 0.22 |