Table 2.
Characteristicsa of Study Participants With Metastatic Prostate Cancer—SEER-Medicare, 1991–1999
| Characteristics | n | No ADT | Orchiectomy | LHRH Agonist |
|---|---|---|---|---|
| n | 5,273 | 1,494 (28.3) | 1,528 (29.0) | 2,251 (42.7) |
| Age, n (%) | ||||
| 65–69 | 1,249 | 373 (29.9) | 276 (22.1) | 600 (48.0) |
| 70–74 | 1,361 | 356 (26.2) | 367 (27.0) | 638 (46.9) |
| 75–79 | 1,152 | 295 (25.6) | 377 (32.7) | 480 (41.7) |
| 80+ | 1,511 | 470 (31.1) | 508 (33.6) | 533 (35.3) |
| Race, n (%) | ||||
| White | 4,140 | 1,054 (25.5) | 1,238 (29.9) | 1,848 (44.6) |
| African American | 1,133 | 440 (38.8) | 290 (25.6) | 403 (35.6) |
| Marital status, n (%) | ||||
| Married | 3,298 | 850 (25.8) | 964 (29.2) | 1,484 (45.0) |
| Not married | 1,737 | 576 (33.2) | 515 (29.6) | 646 (37.2) |
| Data missing | 238 | 68 (28.6) | 49 (20.6) | 121 (50.8) |
| Diagnosis year, n (%) | ||||
| 1991 | 875 | 216 (24.7) | 421 (48.1) | 238 (27.2) |
| 1992 | 974 | 264 (27.1) | 358 (36.8) | 352 (36.1) |
| 1993 | 702 | 174 (24.8) | 221 (31.5) | 307 (43.7) |
| 1994 | 546 | 145 (26.6) | 150 (27.5) | 251 (46.0) |
| 1995 | 536 | 156 (29.1) | 136 (25.4) | 244 (45.5) |
| 1996 | 420 | 145 (34.5) | 89 (21.2) | 186 (44.3) |
| 1997 | 410 | 123 (30.0) | 65 (15.9) | 222 (54.1) |
| 1998 | 431 | 160 (37.1) | 50 (11.6) | 221 (51.3) |
| 1999 | 379 | 111 (29.3) | 38 (10.0) | 230 (60.7) |
| SEER site, n (%) | ||||
| Atlanta | 444 | 116 (26.1) | 133 (30.0) | 195 (43.9) |
| Connecticut | 960 | 222 (23.1) | 284 (29.6) | 454 (47.3) |
| Detroit | 1,360 | 454 (33.4) | 383 (28.2) | 523 (38.5) |
| Los Angeles | 780 | 225 (28.8) | 182 (23.3) | 373 (47.8) |
| San Francisco | 663 | 201 (30.3) | 201 (30.3) | 261 (39.4) |
| San Jose | 273 | 57 (20.9) | 91 (33.3) | 125 (45.8) |
| Seattle-Puget Sound | 793 | 219 (27.6) | 254 (32.0) | 320 (40.4) |
| Histologic grade, n (%) | ||||
| Well differentiated | 150 | 38 (25.3) | 41 (27.3) | 71 (47.3) |
| Moderately differentiated | 1,619 | 447 (27.6) | 438 (27.1) | 734 (45.3) |
| Poorly differentiated | 2,319 | 513 (22.1) | 781 (33.7) | 1,025 (44.2) |
| Data missing | 1,185 | 496 (41.9) | 268 (22.6) | 421 (35.5) |
| Charlson comorbidity score, n (%) | ||||
| 0 | 3,159 | 706 (22.3) | 957 (30.3) | 1,496 (47.4) |
| 1 | 942 | 251 (26.6) | 313 (33.2) | 378 (40.1) |
| 2 | 378 | 124 (32.8) | 100 (26.5) | 154 (40.7) |
| 3+ | 248 | 94 (37.9) | 72 (29.0) | 82 (33.1) |
| Data missing | 546 | 319 (58.4) | 86 (15.8) | 141 (25.8) |
| Census tract % high-school education, n (%) | ||||
| Lowest tertile: 24%–79% | 1,463 | 502 (34.3) | 415 (28.4) | 546 (37.3) |
| Middle tertile: 80%–89% | 1,350 | 359 (26.6) | 426 (31.6) | 565 (41.9) |
| Highest tertile: 90%–100% | 1,588 | 384 (24.2) | 433 (27.3) | 771 (48.6) |
| Data missing | 872 | 249 (28.6) | 254 (29.1) | 369 (42.3) |
| Census tract median household income, n (%) | ||||
| Lowest tertile: $7,657–40,111 | 1,454 | 505 (34.7) | 410 (28.2) | 539 (37.1) |
| Middle tertile: $40,112–57,972 | 1,453 | 388 (26.7) | 458 (31.5) | 607 (41.8) |
| Highest tertile: $57,973–200,008 | 1,494 | 352 (23.6) | 406 (27.2) | 736 (49.3) |
| Data missing | 872 | 249 (28.6) | 254 (29.1) | 369 (42.3) |
a
All pairwise comparisons of percentages for each non-missing level were statistically significant (P < 0.05) except for orchiectomy vs. no ADT for San Francisco, using Tukey’s multiple comparison test.