| Variables |
Variable Description |
| 1. Census tract variables |
|
| Poverty |
≥ 20% vs< 20% of households with income below the federal poverty level |
| Education |
≥ 25% vs< 25% of adults with less than a high school education |
| Residence area |
grouped using Beale codes: 100% rural; urban-rural mix; 100% urban |
| Employment |
≥ 66% versus < 66% of population aged 16 and over who are unemployed |
| 2. Demographic variables |
|
| Insurance |
no insurance; Medicaid; Medicare and public; private insurance |
| Marital status |
single-never married; married; separated; widowed; divorced; unknown |
| Age |
age at diagnosis |
| 3. Tumor characteristics |
|
| Stage |
regional; distant; localized |
| Grade |
moderately differentiate; poorly/un-differentiate; well differentiate; unknown |
| Tumor size |
< 1cm; 1:1 ~ 2cm; 2:1 ~ 3cm; > 3cm; unknown |
| Comorbidity |
mild; moderate; severe; none; unknown |
| 4. Treatment indicators |
|
| Surgery |
mastectomy, lumpectomy, no surgery |
| Radiation |
not administered; administered |
| Chemotherapy |
not administered, administered |
| Hormonal therapy |
not administered; administered |
| ER/PR receptor |
either is positive; both are negative; unknown |
