Table 2 Unadjusted Chemotherapy Rate among Female Patients with Stage II Colon Cancer, SEER-Medicare 1996-2002
| Â | Â | Mammography use before cancer diagnosis | Â | ||
|---|---|---|---|---|---|
| Â | Â | Yes (N = 1,389) | No (N = 1,521) | P value | Total |
Total | Â | 392 (28.2%) | 338 (22.2%) | <0.001 | 730 (25.1%) |
Age-group | 67-69 | 78 (34.2%) | 65 (29.2%) | <0.001 | 143 (31.7%) |
| Â | 70-74 | 163 (32.7%) | 155 (29.2%) | Â | 318 (31.0%) |
| Â | 75-79 | 151 (22.7%) | 118 (15.4%) | Â | 269 (18.8%) |
Race/ethnicity | White | 348 (28.4%) | 294 (22.9%) | 0.28 | 642 (25.6%) |
| Â | Black | 24 (25.3%) | 24 (18.0%) | Â | 48 (21.1%) |
| Â | Other | 20 (28.6%) | 10 (19.6%) | Â | 40 (23.3%) |
State buy-in status | No | 350 (29.6%) | 285 (25.1%) | <0.001 | 635 (27.4%) |
| Â | Yes | 42 (20.4%) | 53 (13.7%) | Â | 95 (16.0%) |
Marriage status | Single | 169 (24.3%) | 164 (17.8%) | <0.001 | 333 (20.6%) |
| Â | Married | 223 (32.1%) | 174 (29.0%) | Â | 397 (30.7%) |
Metropolitan residence | No | 64 (23.0%) | 38 (14.5%) | <0.001 | 102 (18.9%) |
| Â | Yes | 328 (29.5%) | 300 (23.8%) | Â | 628 (26.5%) |
Census tract median household income | <35,000 | 136 (24.7%) | 123 (18.4%) | <0.001 | 259 (21.2%) |
| Â | 35,000-60,000 | 151 (30.0%) | 123 (24.8%) | Â | 274 (27.4%) |
| Â | >60,000 | 105 (31.3%) | 92 (25.8%) | Â | 197 (25.1%) |
Charlson score | 0 | 114 (28.8%) | 137 (25.4%) | <0.001 | 251 (26.8%) |
| Â | 1 | 156 (30.8%) | 109 (25.6%) | Â | 265 (28.4%) |
| Â | 2 | 78 (27.6%) | 40 (17.0%) | Â | 118 (22.8%) |
| Â | 3+ | 44 (21.7%) | 52 (16.2%) | Â | 96 (18.3%) |
Hospital type | Non-teaching | 171 (28.6%) | 139 (20.3%) | 0.35 | 310 (24.2%) |
| Â | Teaching | 221 (27.9%) | 199 (23.8%) | Â | 420 (25.8%) |
Tumor grade | Well/moderately differentiated | 292 (27.8%) | 249 (21.2%) | 0.10 | 541 (24.3%) |
| Â | Poorly differentiated/other | 100 (29.6%) | 89 (25.6%) | Â | 189 (27.6%) |
Extent of diseases | invasion through muscularis | 143 (22.2%) | 103 (16.1%) | <0.001 | 246 (19.2%) |
| Â | extension to adjacent tissue | 173 (31.5%) | 148 (23.8%) | Â | 321 (27.4%) |
| Â | invasion of/through serosa | 22 (27.9%) | 21 (22.1%) | Â | 43 (24.7%) |
| Â | Other | 54 (46.6%) | 66 (39.5%) | Â | 120 (42.4%) |
Bowel obstruction or perforation | No | 356 (27.1%) | 293 (21.1%) | <0.001 | 649 (24.0%) |
| Â | Yes | 36 (48.7%) | 45 (33.6%) | Â | 81 (38.9%) |
More than 12 lymph nodes examined | No | 187 (26.0%) | 180 (21.5%) | 0.05 | 367 (23.6%) |
| Â | Yes | 205 (30.6%) | 158 (23.2%) | Â | 363 (26.9%) |
Oncologist visit | No | 20 (6.4%) | 15 (4.0%) | <0.001 | 35 (5.1%) |
| Â | Yes | 372 (34.5%) | 323 (28.1%) | Â | 695 (31.2%) |
Year | 1996-1998 | 82 (24.1%) | 112 (21.2%) | 0.07 | 194 (22.3%) |
| Â | 1999-2000 | 125 (29.8%) | 88 (21.7%) | Â | 213 (25.8%) |
| Â | 2001-2002 | 185 (29.4%) | 138 (23.5%) | Â | 323 (26.6%) |