TABLE 1.
Patient characteristics by socioeconomic status (SES)
| Lowest SES (0‐19th percentile) | Lower SES (20‐39th percentile) | Moderate SES (40‐59th percentile) | Higher SES (60‐79th percentile) | Highest SES (80‐99th percentile) | |
|---|---|---|---|---|---|
| Number (%) | 4667 (17.3) | 5155 (19.2) | 5493 (20.4) | 5752 (21.4) | 5828 (21.7) |
| Age (median) | 62 | 63 | 63 | 63 | 63 |
| Age | |||||
| >75 years | 709 (15.2) | 907 (17.6) | 1000 (18.2) | 1056 (18.4) | 1093 (18.8) |
| ≤75 years | 3948 (84.8) | 4248 (82.4) | 4493 (81.8) | 4696 (81.6) | 4735 (81.2) |
| Sex | |||||
| Female | 2385 (51.2) | 2563 (49.7) | 2696 (49.1) | 2870 (49.9) | 2844 (48.8) |
| Male | 2272 (48.8) | 2592 (50.3) | 2797 (50.9) | 2882 (50.1) | 2984 (51.2) |
| Race/Ethnicity | |||||
| White | 2324 (50.0) | 3302 (64.1) | 3765 (68.8) | 4029 (70.2) | 4247 (73.2) |
| Black | 1271 (27.3) | 685 (13.3) | 524 (9.6) | 417 (7.3) | 259 (4.5) |
| Hispanic | 797 (17.1) | 781 (15.2) | 657 (12) | 547 (9.5) | 364 (6.3) |
| Asian | 222 (4.8) | 353 (6.9) | 502 (9.2) | 728 (12.7) | 916 (15.8) |
|
American Indian Alaska Native |
39 (0.8) | 28 (0.5) | 28 (0.5) | 17 (0.3) | 13 (0.2) |
| Insurance | |||||
| Insured | 2517 (54.1) | 3194 (62.0) | 3613 (65.8) | 3913 (68.0) | 4055 (69.6) |
| Medicaid | 779 (16.7) | 473 (9.2) | 397 (7.2) | 329 (5.7) | 197 (3.4) |
| Uninsured | 250 (5.4) | 193 (3.7) | 153 (2.8) | 117 (2.0) | 88 (1.5) |
| Prior to 2007 | 1072 (23.0) | 1256 (24.4) | 1281 (23.3) | 1341 (23.3) | 1437 (24.7) |
| Unknown | 39 (0.8) | 39 (0.8) | 49 (0.9) | 52 (0.9) | 51 (0.9) |
| Urban/Rural | |||||
| Rural | 620 (13.3) | 729 (14.1) | 433 (7.9) | 166 (2.9) | 40 (0.7) |
| Mostly Rural | 353 (7.6) | 462 (9) | 472 (8.6) | 310 (5.4) | 208 (3.6) |
| Mostly Urban | 871 (18.7) | 914 (17.7) | 1100 (20) | 1098 (19.1) | 1239 (21.3) |
| Urban | 2813 (60.4) | 3050 (59.2) | 3488 (63.5) | 4178 (72.6) | 4341 (74.5) |
| Primary Site | |||||
| Cecum | 1072 (23.0) | 1222 (23.7) | 1240 (22.6) | 1306 (22.7) | 1328 (22.8) |
| Ascending Colon | 819 (17.6) | 902 (17.5) | 1007 (18.3) | 1032 (17.9) | 1022 (17.5) |
| Hepatic Flexure | 212 (4.6) | 240 (4.7) | 251 (4.6) | 278 (4.8) | 256 (4.4) |
| Transverse Colon | 371 (8.0) | 444 (8.6) | 449 (8.2) | 486 (8.5) | 494 (8.5) |
| Splenic Flexure | 199 (4.3) | 194 (3.8) | 178 (3.2) | 216 (3.8) | 205 (3.5) |
| Descending Colon | 344 (7.4) | 368 (7.1) | 373 (6.8) | 394 (6.9) | 420 (7.2) |
| Sigmoid | 1555 (33.4) | 1693 (32.8) | 1904 (34.7) | 1952 (33.9) | 2027 (34.8) |
| Large Intestine NOS | 85 (1.8) | 92 (1.8) | 91 (1.7) | 88 (1.5) | 76 (1.3) |
| T Stage | |||||
| T1 | 198 (4.3) | 226 (4.4) | 270 (4.9) | 311 (5.4) | 375 (6.4) |
| T2 | 408 (8.8) | 398 (7.7) | 479 (8.7) | 558 (9.7) | 573 (9.8) |
| T3 | 3198 (68.7) | 3596 (69.8) | 3704 (67.4) | 3856 (67) | 3888 (66.7) |
| T4a | 541 (11.6) | 601 (11.7) | 687 (12.5) | 688 (12) | 700 (12) |
| T4b | 312 (6.7) | 334 (6.5) | 353 (6.4) | 339 (5.9) | 292 (5) |
| N Stage | |||||
| N1a | 1501 (32.2) | 1613 (31.3) | 1746 (31.8) | 1814 (31.5) | 1880 (32.3) |
| N1b | 1551 (33.3) | 1707 (33.1) | 1743 (31.7) | 1904 (33.1) | 1825 (31.3) |
| N2a | 940 (20.2) | 1015 (19.7) | 1139 (20.7) | 1145 (19.9) | 1201 (20.6) |
| N2b | 665 (14.3) | 820 (15.9) | 865 (15.8) | 889 (15.5) | 922 (15.8) |
| Lymph Node Evaluation | |||||
| 12 or more | 3765 (80.9) | 4228 (82.0) | 4635 (84.4) | 4814 (83.7) | 4969 (85.3) |
| <12 or unknown | 892 (19.1) | 927 (18) | 858 (15.6) | 938 (16.3) | 859 (14.7) |
| Grade | |||||
| Well‐differentiated | 265 (5.69) | 269 (5.22) | 256 (4.66) | 237 (4.12) | 297 (5.1) |
| Moderately‐differentiated | 3317 (71.23) | 3555 (68.96) | 3807 (69.31) | 3970 (69.02) | 3893 (66.8) |
| Poorly/undifferentiated | 1008 (21.64) | 1276 (24.75) | 1371 (24.96) | 1474 (25.63) | 1559 (26.75) |
| Unknown | 67 (1.44) | 55 (1.07) | 59 (1.07) | 71 (1.23) | 79 (1.36) |