Table 1.
Characteristics of evaluable prostate cancer cases (1996–2002, n = 17,665) and census tracts (1990, n = 854) during study period
| Variable | Number (%) |
|---|---|
| Individual-level characteristics | |
| Race | |
| African-American (Black) | 5,139 (29) |
| European-American (White) | 12,193 (69) |
| Other/unknown | 333 (2) |
| Disease stage at diagnosis | |
| Localized | 12,894 (73) |
| Regional | 1,793 (10) |
| Distant/metastasized | 827 (5) |
| Unstageable/unknown | 2,151 (12) |
| Disease grade at diagnosis | |
| Well differentiated | 1,177 (7) |
| Moderately differentiated | 11,579 (66) |
| Poorly differentiated | 3,175 (18) |
| Undifferentiated | 98 (1) |
| Not determined | 1,636 (9) |
| Age (mean ± SD)a | 68 ± 9 |
| Census tract-level characteristics | |
| Groundwater use | |
| Low (< 50%) | 682 (80) |
| High (≥50%) | 172 (20) |
| No. of agricultural areas | |
| Low (< 15) | 270 (32) |
| Medium (15–42) | 291 (34) |
| High (> 42) | 293 (34) |
| No. of hazardous waste (CERCLA)b sites | |
| 0 | 491 (57) |
| 1 | 196 (23) |
| 2 | 86 (10) |
| 3 | 40 (5) |
| ≥4 | 41 (5) |
a
Standard deviation
b
Comprehensive Environmental Response, Compensation, and Liability Act