Table 1 Patient Characteristics by Screening Mammography Use before the Cancer Diagnosis, SEER-Medicare 1996-2002
| Â | Â | Mammography before cancer diagnosis | Â | ||
|---|---|---|---|---|---|
| Â | Â | Yes | No | P value | Total |
N | Â | 1,389 | 1,521 | Â | 2,910 |
Age, in years | Mean (SD) | 73.8 (3.6) | 74.1 (3.6) | 0.03 | 74.0 (3.6) |
Age-group | 67-69 | 228 (16.4%) | 223 (14.7%) | 0.28 | 451 (15.5%) |
| Â | 70-74 | 496 (35.7%) | 531 (34.9%) | Â | 1027 (35.3%) |
| Â | 75-79 | 665 (47.9%) | 767 (50.4%) | Â | 1432 (49.2%) |
Race/ethnicity | White | 1224 (88.1%) | 1286 (84.6%) | 0.02 | 2510 (86.3%) |
| Â | Black | 95 (6.8%) | 133 (8.7%) | Â | 228 (7.8%) |
| Â | Other | 70 (5.0%) | 102 (6.7%) | Â | 172 (5.9%) |
State buy-in status | Yes | 206 (14.8%) | 387 (25.4%) | <0.001 | 593 (20.0%) |
Married | Yes | 694 (50.0%) | 600 (39.5%) | <0.001 | 1294 (44.5%) |
Metropolitan residence | Yes | 1111 (80.0%) | 1259 (82.8%) | 0.05 | 2370 (81.4%) |
Census tract median household income | <$35,000 | 551 (39.7%) | 669 (44.0%) | 0.05 | 1220 (41.9%) |
| Â | $35,000-$60,000 | 503 (34.3%) | 496 (32.6%) | Â | 999 (34.3%) |
| Â | >$60,000 | 335 (23.8%) | 356 (23.4%) | Â | 691 (23.8%) |
Charlson score | 0 | 396 (28.5%) | 539 (35.4%) | <0.001 | 935 (32.1%) |
| Â | 1 | 507 (36.5%) | 426 (28.0%) | Â | 933 (32.1%) |
| Â | 2 | 283 (20.4%) | 235 (15.5%) | Â | 518 (17.8%) |
| Â | 3+ | 203 (14.6%) | 321 (21.1%) | Â | 524 (18.0%) |
Teaching hospital | Â | 792 (57.9%) | 836 (55.0%) | 0.26 | 1628 (56.0%) |
Tumor grade | Well/moderately differentiated | 1051 (75.7%) | 1173 (77.1%) | 0.36 | 2224 (76.4%) |
Extent of disease 1 | invasion through muscularis | 644 (46.4%) | 638 (42.0%) | 0.03 | 1282 (44.1%) |
| Â | extension to adjacent tissue | 550 (39.6%) | 621 (40.8%) | Â | 1171 (40.2%) |
| Â | invasion of/through serosa | 79 (5.7%) | 95 (6.3%) | Â | 174 (6.0%) |
| Â | Other | 116 (8.4%) | 167 (11.0%) | Â | 283 (9.7%) |
Bowel obstruction or perforation | 74 (5.3%) | 134 (8.8%) | <0.001 | 208 (7.2%) | |
More than 12 lymph nodes examined | 670 (48.2%) | 682 (44.8%) | 0.07 | 1352 (46.5%) | |
Oncologist visit | 1078 (77.6%) | 1148 (75.5%) | 0.18 | 2226 (76.5%) | |
Year | 1996-1998 | 341 (24.6%) | 528 (34.7%) | <0.001 | 869 (29.9%) |
| Â | 1999-2000 | 419 (30.2%) | 406 (26.7%) | Â | 825 (28.4%) |
| Â | 2001-2002 | 629 (45.3%) | 587 (38.6%) | Â | 1216 (41.8%) |