In situ breast cancer | Invasive breast cancer | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
NSAID use | Number of cancers | Person-years | Relative riska | 95% confidence interval | P value for trend | Number of cancers | Person-years | Relative riska | 95% confidence interval | P value for trend |
Aspirin useb | ||||||||||
Never | 298 | 280,077 | 1.00 (referent) | 0.02 | 1,254 | 283,247 | 1.00 (referent) | 0.37 | ||
<1/week | 233 | 261,641 | 0.80 | 0.67 to 0.96 | 1,166 | 264,821 | 0.99 | 0.91 to 1.07 | ||
1–6/week | 124 | 131,305 | 0.85 | 0.69 to 1.05 | 589 | 132,899 | 0.98 | 0.88 to 1.08 | ||
1+/day | 122 | 143,137 | 0.78 | 0.63 to 0.96 | 648 | 144,854 | 0.96 | 0.87 to 1.06 | ||
Non-aspirin NSAID useb | ||||||||||
Never | 292 | 324,890 | 1.00 (referent) | 0.45 | 1,463 | 328,884 | 1.00 (referent) | 0.88 | ||
<1/week | 269 | 258,097 | 1.14 | 0.96 to 1.35 | 1,140 | 261,013 | 0.97 | 0.90 to 1.05 | ||
1–6/week | 122 | 124,433 | 1.06 | 0.85 to 1.31 | 569 | 125,934 | 1.01 | 0.92 to 1.12 | ||
1+/day | 91 | 107,466 | 0.87 | 0.69 to 1.10 | 494 | 108,757 | 0.98 | 0.89 to 1.09 |