Table 1.
The baseline demographic, clinicopathological and surgery features of mucinous adenocarcinoma (MAC) and non-specific adenocarcinoma (AC) of right colon cancer (RCC) patients.
| Variables | MAC (3,413) | AC (24,497) | P value |
|---|---|---|---|
| Race | |||
| White | 2,839(83.2%) | 19,457(79.4%) | |
| Black | 356(10.4%) | 3,054(12.5%) | |
| Others | 218(6.4%) | 1,986(8.1%) | <0.001 |
| Age (years) | |||
| ≤60 | 795(23.3%) | 5572(22.7%) | |
| >60 | 2618(76.7%) | 18,925(77.3%) | 0.475 |
| Sex | |||
| Female | 1,869(54.8%) | 13,050(53.3%) | |
| Male | 1,544(45.2%) | 11,447(46.7%) | 0.102 |
| Surgery type | |||
| RHC | 2,752(80.6%) | 19,583(79.9%) | |
| PC | 661(19.4%) | 4,914(20.1%) | 0.343 |
| CEA | |||
| Normal | 1,773(50.7%) | 14,186(57.9%) | |
| Elevated | 1,640(48.1%) | 10,311(42.1%) | <0.001 |
| PNI | |||
| Absent | 3,100(90.8%) | 21,398(87.3%) | |
| Present | 313(9.2%) | 3,099(12.7%) | <0.001 |
| Size (cm) | |||
| ≤5 | 1,485(43.5%) | 14,776(60.3%) | |
| >5 | 1,928(56.5%) | 9,721(39.7%) | <0.001 |
| Tumor number | |||
| Solitary | 2,396(70.2%) | 17,583(71.8%) | |
| Multiple | 1,017(29.8%) | 6,914(28.2%) | 0.056 |
| Location | |||
| Cecum | 1,417(41.5%) | 9,373(38.3%) | |
| Ascending Colon | 1,185(34.7%) | 8,688(35.5%) | |
| Hepatic Flexure | 274(8.0%) | 2,068(8.4%) | |
| Transverse Colon | 537(15.7%) | 4,368(17.8%) | 0.001 |
| Differentiation | |||
| Grade I/II | 2,603(76.3%) | 18,372(75.0%) | |
| Grade III/IV | 810(23.7%) | 6,125(25.0%) | 0.108 |
| Stage (TNM 7ed) | |||
| I | 381(11.2%) | 3,954(16.1%) | |
| II | 1,364(40.0%) | 8,961(36.6%) | |
| III | 1,185(34.7%) | 8,005(32.7%) | |
| IV | 483(14.2%) | 3,577(14.6%) | <0.001 |
| Bone metastases | |||
| No | 3,386(99.2%) | 24,324(99.3%) | |
| Yes | 8(0.2%) | 73(0.3%) | |
| Unknown | 19(0.6%) | 100(0.4%) | 0.374 |
| Brain metastases | |||
| No | 3,396(99.5%) | 24,372(99.5%) | |
| Yes | 1(0.0%) | 16(0.1%) | |
| Unknown | 16(0.5%) | 109(0.4%) | 0.713 |
| Liver metastases | |||
| No | 3,134(91.8%) | 21,839(89.1%) | |
| Yes | 273(8.0%) | 2,593 (10.6%) | |
| Unknown | 6(0.2%) | 65 (0.3%) | <0.001 |
| Lung metastases | |||
| No | 3,338(97.8%) | 23,841(97.3%) | |
| Yes | 57(1.7%) | 539(2.2%) | |
| Unknown | 18(0.5%) | 117(0.5%) | 0.124 |
| Perioperative mortality | |||
| Yes | 82(2.4%) | 680(2.8%) | |
| No | 3,331(97.6%) | 23,817(97.2%) | 0.210 |
| Postoperative chemotherapy | |||
| Yes | 1,278(37.4%) | 8,523(34.8%) | |
| No/Unknown | 2,135(62.6%) | 15,974(65.2%) | 0.002 |
| Dissected lymph nodes | 21.08 ± 10.120 | 20.72 ± 9.996 | 0.059 |
| Positive lymph nodes | 2.41 ± 4.690 | 2.01 ± 3.923 | <0.001 |
CEA, carcinoembryonic antigen; PNI, perineural invasion; TNM, tumor-node-metastasis; RHC, right hemicolectomy; PC, partial colectomy.