Table 1.
Prevalence (%) of Demographic, Tumor, Treatment and Outcome Characteristics of the Study Population at Diagnosis, by Age and Race, 1988–2003 SEER (N=224,930).
| < 40 yrs(N=13944) | 40–49 yrs(N=43589) | 50–64 yrs(N=74785) | 65+ yrs(N=92612) | |||||
|---|---|---|---|---|---|---|---|---|
| B | W | B | W | B | W | B | W | |
| N (%) | 2196(10.8) | 11748(5.7) | 5020(24.6) | 38569(18.9) | 6846(33.5) | 67939(33.2) | 6362(31.1) | 86250(42.2) |
| Demographics | ||||||||
| Marital Status | ||||||||
| Not Married | 56.7 | 27.0 | 51.7 | 26.3 | 54.9 | 28.0 | 67.9 | 53.7 |
| Married | 38.3 | 68.4 | 42.2 | 68.5 | 39.2 | 67.1 | 26.4 | 41.6 |
| Unknown | 5.0 | 4.6 | 6.2 | 5.2 | 5.9 | 4.9 | 5.7 | 4.7 |
| SEER Registry | ||||||||
| San Fran-Oak | 13.3 | 14.1 | 14.9 | 15.2 | 16.0 | 15.0 | 17.2 | 14.3 |
| Connecticut | 10.0 | 17.0 | 10.9 | 17.5 | 11.2 | 17.3 | 10.4 | 18.7 |
| Metro Detroit | 30.2 | 15.2 | 35.5 | 15.4 | 38.9 | 15.5 | 44.8 | 15.8 |
| Hawaii | 0.9 | 1.9 | 0.2 | 1.8 | 0.3 | 1.7 | 0.2 | 1.3 |
| Iowa | 1.9 | 12.6 | 1.3 | 11.4 | 1.4 | 12.5 | 1.7 | 16.1 |
| New Mexico | 0.5 | 6.9 | 0.6 | 6.4 | 0.8 | 6.5 | 0.7 | 6.0 |
| Seattle | 5.5 | 16.3 | 4.5 | 17.1 | 4.0 | 16.9 | 3.7 | 15.9 |
| Utah | 0.2 | 6.4 | 0.2 | 5.7 | 0.2 | 6.1 | 0.2 | 5.8 |
| Metro Atlanta | 37.6 | 9.7 | 32.0 | 9.4 | 27.1 | 8.6 | 21.1 | 6.0 |
| Tumor Characteristics | ||||||||
| Stage at Diagnosis | ||||||||
| In Situ | 9.1 | 12.0 | 16.3 | 19.5 | 17.0 | 17.3 | 14.2 | 11.6 |
| I | 17.5 | 27.6 | 24.1 | 32.2 | 28.0 | 39.7 | 30.4 | 43.4 |
| II | 48.2 | 44.4 | 40.1 | 35.5 | 34.8 | 30.5 | 30.6 | 28.6 |
| III | 12.4 | 7.7 | 8.8 | 5.8 | 8.3 | 4.6 | 8.3 | 5.0 |
| IV | 6.1 | 3.1 | 5.1 | 2.6 | 6.8 | 3.6 | 7.9 | 4.9 |
| Unstaged | 6.7 | 5.2 | 5.5 | 4.4 | 5.1 | 4.2 | 8.4 | 6.5 |
| Tumor Size | ||||||||
| <2 cm | 27.6 | 40.9 | 36.6 | 49.1 | 41.6 | 55.5 | 40.4 | 52.6 |
| 2–5 cm | 44.4 | 39.1 | 39.0 | 31.8 | 34.2 | 27.3 | 32.9 | 29.8 |
| >5–10 cm | 11.3 | 6.1 | 7.4 | 4.4 | 6.9 | 3.4 | 7.3 | 3.8 |
| >10–25 cm | 1.0 | 0.6 | 1.1 | 0.5 | 1.1 | 0.4 | 1.2 | 0.4 |
| Diffuse | 2.4 | 1.6 | 2.1 | 1.2 | 1.8 | 1.1 | 1.8 | 0.9 |
| Unknown | 13.3 | 11.7 | 13.9 | 13.1 | 14.3 | 12.3 | 16.3 | 12.4 |
| Grade | ||||||||
| 1 | 2.9 | 5.2 | 6.8 | 10.2 | 8.9 | 13.7 | 10.3 | 14.5 |
| 2 | 18.4 | 23.8 | 22.7 | 28.4 | 24.8 | 30.5 | 26.1 | 31.0 |
| 3 | 50.5 | 41.3 | 41.4 | 30.5 | 36.4 | 26.0 | 28.5 | 21.8 |
| Unknown | 28.2 | 29.7 | 29.0 | 30.8 | 29.9 | 29.8 | 35.1 | 32.7 |
| Node Involvement | ||||||||
| No | 47.1 | 55.8 | 57.0 | 65.4 | 59.7 | 68.7 | 57.6 | 66.1 |
| Yes | 44.8 | 38.5 | 36.0 | 30.3 | 32.3 | 26.3 | 26.7 | 21.1 |
| Unknown | 8.0 | 5.7 | 7.1 | 4.3 | 8.0 | 5.0 | 15.7 | 12.8 |
| Laterality | ||||||||
| Right | 48.9 | 49.4 | 48.5 | 49.4 | 47.1 | 48.5 | 48.4 | 48.1 |
| Left | 50.5 | 50.1 | 51.0 | 50.2 | 52.3 | 51.0 | 50.5 | 50.7 |
| Bilateral/Unknown | 0.5 | 0.5 | 0.5 | 0.4 | 0.6 | 0.5 | 1.1 | 1.2 |
| ER status | ||||||||
| Neg | 34.6 | 27.0 | 28.8 | 18.1 | 24.9 | 14.7 | 16.0 | 10.2 |
| Pos | 31.5 | 39.9 | 34.1 | 46.0 | 37.0 | 50.8 | 41.4 | 53.6 |
| Unknown | 33.8 | 33.0 | 37.2 | 35.9 | 38.1 | 34.5 | 42.5 | 36.2 |
| PR status | ||||||||
| Neg | 36.9 | 29.3 | 30.6 | 20.2 | 30.6 | 21.0 | 23.4 | 18.5 |
| Pos | 28.6 | 36.7 | 31.6 | 42.8 | 30.5 | 42.9 | 33.0 | 43.7 |
| Unknown | 34.5 | 34.0 | 37.8 | 37.0 | 38.9 | 36.1 | 43.6 | 37.8 |
| Treatment Characteristics | ||||||||
| Radiation | ||||||||
| No | 56.5 | 54.4 | 55.4 | 52.0 | 54.2 | 50.6 | 65.6 | 64.1 |
| Yes | 39.1 | 42.9 | 40.2 | 45.5 | 41.9 | 47.5 | 32.0 | 34.6 |
| Unknown | 4.5 | 2.7 | 4.4 | 2.5 | 3.9 | 1.9 | 2.4 | 1.3 |
| Surgery | ||||||||
| No | 4.6 | 1.9 | 3.6 | 1.9 | 4.5 | 2.3 | 8.2 | 4.6 |
| Yes | 78.9 | 81.2 | 81.3 | 82.6 | 81.1 | 85.2 | 79.0 | 86.0 |
| Unknown | 16.5 | 16.9 | 15.1 | 15.5 | 14.4 | 12.5 | 12.8 | 9.4 |
| Outcomes | ||||||||
| Died | ||||||||
| Yes | 31.7 | 18.9 | 23.5 | 12.3 | 26.6 | 14.9 | 45.1 | 38.4 |
| No | 68.3 | 81.1 | 76.5 | 87.7 | 73.4 | 85.1 | 54.9 | 61.6 |
| Breast Cancer-Specific Death | ||||||||
| Yes | 27.7 | 17.0 | 19.2 | 10.5 | 19.0 | 10.5 | 19.6 | 13.3 |
| No | 72.3 | 83.0 | 80.8 | 89.5 | 81.0 | 89.5 | 80.4 | 86.7 |
| Other Cause of Death | ||||||||
| Yes | 4.0 | 1.9 | 4.3 | 1.8 | 7.6 | 4.4 | 25.5 | 25.1 |
| No | 96.0 | 98.1 | 95.7 | 98.2 | 92.4 | 95.6 | 74.5 | 74.9 |
Note. B = Black; W = White; All chi-square comparisons were statistically significant except for laterality within each of the age groups, and for other cause of death within the 65+ age group.