Table 1.
Patient Demographic and Tumor and Treatment Characteristics
| Characteristic | No. of Patients (N = 10,197) | % |
|---|---|---|
| Patient factors | ||
| Age, years | ||
| < 40 | 1,055 | 10.3 |
| 40-49 | 2,397 | 23.5 |
| 50-59 | 3,162 | 31.0 |
| 60-69 | 1,968 | 19.3 |
| ≥ 70 | 1,615 | 15.4 |
| Race | ||
| White | 8,436 | 82.7 |
| Black | 1,371 | 13.5 |
| Other | 277 | 2.7 |
| Unknown | 113 | 1.1 |
| Charlson-Deyo Score | ||
| 0 | 5,271 | 51.7 |
| 1 | 808 | 7.9 |
| 2 | 159 | 1.6 |
| Unknown | 3,959 | 38.8 |
| Primary payer | ||
| Not insured | 462 | 4.5 |
| Private insurance | 5,862 | 57.5 |
| Public insurance | 3,608 | 35.4 |
| Unknown | 265 | 2.6 |
| Geographic location | ||
| Atlantic | 1,499 | 14.7 |
| Great Lakes | 1,790 | 17.6 |
| Midwest | 900 | 8.8 |
| Mountain | 478 | 4.7 |
| Northeast | 529 | 5.2 |
| Pacific | 1,404 | 13.8 |
| South | 669 | 6.6 |
| Southeast | 2,031 | 19.9 |
| West | 897 | 8.8 |
| Income | ||
| < $30,000 | 1,410 | 13.8 |
| $30,000-$34,900 | 1,787 | 17.5 |
| $35,000-$45,900 | 2,641 | 25.9 |
| > $46,000 | 3,872 | 38.0 |
| Unknown | 487 | 4.8 |
| Community | ||
| Urban/metro: population > 1,000,000 | 537 | 5.3 |
| Urban/metro: population 250,000-1,000,000 | 5,040 | 49.4 |
| Urban/metro: population < 250,000 | 1,896 | 18.6 |
| Urban: population > 20,000 adjacent to metro area | 1,080 | 10.6 |
| Urban: population > 20,000 not adjacent to metro area | 445 | 4.4 |
| Urban: population 2,500-19,999 adjacent to metro area | 176 | 1.7 |
| Urban: population 2,500-19,999 not adjacent to metro area | 543 | 5.3 |
| Rural: population < 2,500 adjacent to metro area | 301 | 3.0 |
| Rural: population < 2,500 not adjacent to metro area | 84 | 0.8 |
| Tumor factors | ||
| Grade | ||
| Well differentiated | 223 | 2.2 |
| Moderately differentiated | 2,189 | 21.5 |
| Poorly differentiated | 5,923 | 58.1 |
| Undifferentiated | 246 | 2.4 |
| Unknown | 1,616 | 15.9 |
| Nodal stage | ||
| 0 | 1,707 | 16.7 |
| 1 | 2,845 | 27.9 |
| 2 | 1,642 | 16.1 |
| 3 | 957 | 9.4 |
| Unknown | 3,046 | 29.9 |
| Treatment factors | ||
| Treatment facility type | ||
| Academic/research program | 3,240 | 31.8 |
| Community cancer program | 1,538 | 15.1 |
| Comprehensive community cancer program | 5,242 | 51.4 |
| Other | 177 | 1.7 |
| Operation performed | ||
| Segmental mastectomy | 536 | 5.3 |
| Unilateral mastectomy | 1,079 | 10.6 |
| Ipsilateral mastectomy + CPM | 224 | 2.2 |
| Unilateral MRM | 6,890 | 67.6 |
| Ipsilateral MRM + CPM | 1,131 | 11.1 |
| Unilateral RM | 162 | 1.6 |
| Ipsilateral RM + CPM | 38 | 0.4 |
| Other/Unknown | 137 | 1.3 |
| Treatment received | ||
| Surgery alone | 500 | 4.9 |
| Surgery + chemo | 2,728 | 26.8 |
| Surgery + RT | 158 | 1.6 |
| Surgery + RT + chemo | 6,811 | 66.8 |
Abbreviations: chemo, chemotherapy; CPM, contralateral prophylactic mastectomy; MRM, modified radical mastectomy; RM, radical mastectomy; RT, radiation therapy.