Table 1.
Sociodemographic and Clinical Characteristics of the Sample*
| Breast Cancer | Prostate Cancer | ||||
|---|---|---|---|---|---|
| Variable | Value | N | % | N | % |
| Age | 66–69 | 6,534 | 21 | 14,388 | 25 |
| 70–74 | 9,232 | 30 | 19,817 | 34 | |
| 75–79 | 7,805 | 25 | 14,199 | 24 | |
| 80–84 | 4,918 | 16 | 6,993 | 12 | |
| ≥85 | 2,574 | 8 | 3,166 | 5 | |
| Race | White | 28,306 | 91 | 50,151 | 86 |
| Black | 1,537 | 5 | 5,156 | 9 | |
| Other | 1,129 | 4 | 2,433 | 4 | |
| Unknown | 91 | <1 | 823 | 1 | |
| Hispanic ethnicity | No | 30,003 | 97 | 55,268 | 94 |
| Yes | 927 | 3 | 2,387 | 4 | |
| Unknown | 133 | <1 | 908 | 2 | |
| Marital status | Married | 13,849 | 45 | 42,323 | 72 |
| Prior cancer | Prior other cancer | 2,473 | 8 | 5,150 | 9 |
| Modified AJCC*stage | Stage 1 | 18,747 | 60 | — | — |
| Stage 2 | 12,316 | 40 | — | — | |
| Grade | Well differentiated | 5,555 | 18 | 7,593 | 13 |
| Moderately differentiated | 12,102 | 39 | 36,369 | 62 | |
| Poorly differentiated | 7,713 | 25 | 11,433 | 20 | |
| Undifferentiated | 609 | 2 | 243 | <1 | |
| Unknown | 5,084 | 16 | 2,925 | 5 | |
| Breast cancer turnor size | ≤10 | 9,215 | 30 | — | — |
| 11–15 | 7,448 | 24 | — | — | |
| 16–20 | 5,281 | 17 | — | — | |
| 21–30 | 5,628 | 18 | — | — | |
| >30 | 3,229 | 10 | — | — | |
| Unknown | 262 | 1 | — | — | |
| Year of diagnosis | 1993 | 4,552 | 15 | 10,159 | 17 |
| 1994 | 4,435 | 14 | 8,752 | 15 | |
| 1995 | 4,524 | 15 | 8,084 | 14 | |
| 1996 | 4,321 | 14 | 7,866 | 13 | |
| 1997 | 4,446 | 14 | 8,112 | 14 | |
| 1998 | 4,397 | 14 | 7,649 | 13 | |
| 1999 | 4,388 | 14 | 7,941 | 14 | |
| Median household income for census tract of residence† | Mean (SD) | 30,553 | $39,220 (18,262) | 57,316 | $39,261 (19,097) |
| Proportion of nonhigh school graduates in the census tract of residence† | Mean (SD) | 30,553 | 19.1 (11.9) | 57,316 | 19.8 (12.8) |
| Comorbidity score | Mean (SD) | 31,063 | 0.75 (1.28) | 58,563 | 0.77 (1.32) |
| Market share of managed care(%)‡ | <1 | 6,833 | 22 | 13,275 | 23 |
| 1–10 | 9,326 | 30 | 19,389 | 33 | |
| >10–30 | 6,560 | 21 | 12,078 | 21 | |
| >30 | 8,344 | 27 | 13,821 | 24 | |
*
AJCC, American Joint Committee on Cancer. AJCC stage was not available for men with prostate cancer because many men did not undergo complete staging evaluations.
†
Data on Census tract variables were missing for 1.6% of breast cancer patients and 2.1% of prostate cancer patients. For models, patients were assigned to quartiles for the census-level variables within registry to account for regional differences in median income and education levels, and quartiles were then grouped across registries.
‡
Patients were assigned to a category of managed care market share based on the category of managed care market share for the county where they resided in the year they were diagnosed.