Table 3.
Percent frequency distribution of IBC cases compared to all breast cancer cases for each SEER Tumor Registry, during the years 1992 to 2002
| SEER Registry | All breast cancer cases | Comprehensive IBC | ||||||
|---|---|---|---|---|---|---|---|---|
| n | Rate | Count (n) | % of total breast cases | Rate | RR | 95% CI | ||
| Los Angeles | 57,161 | 124.821 | 1,401 | 2.45% | 3.042 | 1.00 | LL | UL |
| Rural Georgia | 763 | 2.979 | 21 | 2.75% | 2.979 | 0.98 | 0.60 | 1.52 |
| Atlanta (Metropolitan) | 17,050 | 133.937 | 372 | 2.18% | 2.844 | 0.93 | 0.83 | 1.05 |
| Utah | 10,228 | 115.758 | 233 | 2.28% | 2.622 | 0.86 | 0.75 | 0.99 |
| Iowa | 24,216 | 129.963 | 459 | 1.90% | 2.547 | 0.84 | 0.75 | 0.93 |
| New Mexico | 10,993 | 115.665 | 229 | 2.08% | 2.419 | 0.80 | 0.69 | 0.92 |
| Seattle (Puget Sound) | 31,048 | 146.153 | 512 | 1.65% | 2.413 | 0.79 | 0.72 | 0.88 |
| San Francisco-Oakland | 32,070 | 139.585 | 549 | 1.71% | 2.392 | 0.79 | 0.71 | 0.87 |
| Hawaii | 8,565 | 126.277 | 148 | 1.73% | 2.192 | 0.72 | 0.60 | 0.86 |
| Detroit (Metropolitan) | 31,934 | 134.413 | 515 | 1.61% | 2.19 | 0.72 | 0.65 | 0.80 |
| Alaska Natives | 444 | 124.031 | 10 | 2.25% | 2.183 | 0.72 | 0.33 | 1.55 |
| Connecticut | 30,128 | 141.093 | 449 | 1.49% | 2.12 | 0.70 | 0.62 | 0.78 |
| San Jose-Monterey | 15,524 | 135.755 | 239 | 1.54% | 2.064 | 0.68 | 0.59 | 0.78 |
| All SEER Registries | 270,124 | 132.429 | 5,137 | 1.90% | 2.120 | 0.70 | 0.62 | 0.78 |
Key: n, sample size; Comprehensive IBC (i.e., IBC=ICD-O 8530 or EOD-E 70 or EOD-S 998); Rate, age-adjusted incidence rate expressed per 100,000 woman-years: RR, rate ratio where the rate for a given registry is compared to the Los Angeles Tumor Registry with an assigned RR of 1.00; 95% CI, 95% confidence intervals with lower and upper limits (LL and UL); ∼, not calculated.