Table 6.
Cancer and the Estrogen-Alone Arm of the Women's Health Initiative[11]
| Estrogen Alone(ET) (N = 5310) | Placebo (N = 5429) | |||||||
|---|---|---|---|---|---|---|---|---|
| Cancer | Significance | Decreased or increased per 10,000 per year |
Number ET |
Per 10,000/yr ET |
Number placebo |
Per 10,000/yr placebo |
Percent (%) reduction or increased |
Hazard ratio/95% nCI |
| Invasive breast | None P=0.06 | 7 Decreased | 94 | 26 | 124 | 33 | 23 % decreased | 0.77/ 059 – 1.01 |
| Colorectal | None | 1 Increased | 61 | 17 | 58 | 16 | 5 % increased | 1.08/ 0.75 – 1.55 |
| Total | None | 7 | ND | 103 | ND | 110 | 6 % decreased | 0.93/ 0.81 – 1.07 |
ND = no data