Table 1.
Breast Cancer, Patient, and Area-Level Characteristics of the Study Population at 5 SEER Program Sites, 1992–1999
| Detroit, Michigan | Atlanta, Georgia | Seattle, Washington | San Francisco, California | Connecticut | |
| Breast cancer characteristics | |||||
| Breast cancers, no. | 7,867 | 2,920 | 5,504 | 4,090 | 7,555 |
| Breast cancer deaths, no. (%) | 837 (10.6) | 310 (10.6) | 500 (9.1) | 349 (8.5) | 821 (10.9) |
| 5-year survival rate | 85.8 | 85.9 | 88.1 | 89.5 | 85.3 |
| Patient characteristics | |||||
| Aged ≥85 years, % | 9.2 | 10.0 | 10.2 | 12.4 | 12.4 |
| African American, % | 16.5 | 19.0 | 1.1 | 7.4 | 3.1 |
| Stage at diagnosis, % | |||||
| In situ | 14.5 | 12.7 | 11.7 | 13.0 | 12.1 |
| Stage I | 42.0 | 43.1 | 48.6 | 44.3 | 42.5 |
| Stage II | 28.0 | 27.8 | 23.6 | 29.4 | 27.8 |
| Stage III | 5.3 | 5.5 | 7.4 | 4.3 | 4.4 |
| Stage IV | 4.6 | 4.4 | 3.6 | 3.4 | 4.4 |
| Stage unknown | 5.7 | 6.5 | 5.1 | 5.6 | 8.9 |
| Ductal carcinoma, % | 65.7 | 71.6 | 61.7 | 67.4 | 70.5 |
| Two or more comorbid conditions, % | 26.9 | 18.1 | 16.1 | 16.1 | 18.6 |
| Ambulatory-care–sensitive hospitalization, % | 13.6 | 11.9 | 8.9 | 10.0 | 10.5 |
| Area-level characteristics | |||||
| Census tracts, no. | 1,088 | 368 | 754 | 842 | 838 |
| Census tracts with at least 1 breast cancer patient, no. | 1,031 | 345 | 699 | 744 | 779 |
| Unknown census tract, % | 0.1 | 0.3 | 0.0 | 1.5 | 1.8 |
| Median census-tract poverty rate (minimum–maximum) | 6.9 (0.0–80.2) | 8.2 (0.0–93.9) | 7.7 (0.0–79.4) | 6.1 (0.0–100.0) | 3.8 (0.0–100.0) |
| Median census-tract percent African American (minimum–maximum) | 1.5 (0.0–100.0) | 17.8 (0.0–100.0) | 1.2 (0.0–74.8) | 3.8 (0.0–94.1) | 2.2 (0.0–96.0) |
| Correlation between census-tract poverty rate and percent African American | 0.771* | 0.716* | 0.450* | 0.621* | 0.613* |
Abbreviation: SEER, Surveillance, Epidemiology, and End Results.
*
P < 0.001.