Table 1.
Univariate analysis of the association between clinicopathologic variables and age in patients of different races
| Patient characteristics | African-American
|
White
|
Asian/Pacific Islander
|
||||||
|---|---|---|---|---|---|---|---|---|---|
| n | Mean age (years) |
P-value | n | Mean age (years) |
P-value | n | Mean age (years) |
P-value | |
| Sex | <0.001 | <0.001 | <0.001 | ||||||
| <0.001 | |||||||||
| Male | 15,078 | 63±12 | 112,370 | 68±13 | 10,706 | 65±13 | |||
| Female | 15,827 | 65±13 | 106,125 | 71±13 | 10,284 | 67±14 | |||
| T stage | 0.989 | <0.001 | 0.974 | ||||||
| Tis, T0, T1, T2 | 8,842 | 65±12 | 66,115 | 69±12 | 6.068 | 66±12 | |||
| T3–T4 (4, 5) | 22,063 | 64±13 | 152,380 | 69±13 | 14,922 | 66±14 | |||
| N stage | <0.001 | <0.001 | <0.001 | ||||||
| N0 | 16,873 | 65±12 | 127,545 | 71±13 | 11,254 | 67±13 | |||
| N1 | 8,648 | 64±13 | 54,227 | 68±13 | 5,805 | 65±13 | |||
| N2 | 5,384 | 62±12 | 36,723 | 66±14 | 3,931 | 63±14 | |||
| Distant metastasis | <0.001 | <0.001 | <0.001 | ||||||
| M0 | 25,865 | 65±13 | 190,352 | 70±13 | 18,208 | 66±13 | |||
| M1 | 5,040 | 62±13 | 28,143 | 65±14 | 2,782 | 63±14 | |||
| Chemotherapy | <0.001 | <0.001 | <0.001 | ||||||
| No | 19,025 | 67±12 | 139,239 | 74±12 | 12,261 | 70±13 | |||
| Yes | 11,880 | 59±12 | 79,256 | 62±13 | 8,729 | 60±13 | |||
| Radiotherapy | <0.001 | <0.001 | <0.001 | ||||||
| No | 64 | 67±13 | 623 | 74±13 | 66 | 70±14 | |||
| Yes | 2,907 | 59±12 | 26,112 | 61±12 | 2,959 | 59±13 | |||
| Unknown | 27,934 | 65±13 | 191,760 | 71±13 | 17,965 | 67±13 | |||
| Pathology grade | <0.001 | <0.001 | <0.001 | ||||||
| Well differentiated | 2,735 | 65±12 | 18,756 | 69±13 | 1,475 | 65±13 | |||
| Moderately differentiated | 21,740 | 64±13 | 146,085 | 69±13 | 14,931 | 66±13 | |||
| Poorly differentiated | 4,364 | 64±13 | 38,025 | 71±14 | 3,392 | 65±15 | |||
| Undifferentiated | 539 | 63±14 | 5,434 | 71±14 | 309 | 65±15 | |||
| Unknown | 1,527 | 63±12 | 10,195 | 66±13 | 882 | 63±13 | |||
| Pathologic type | 0.010 | <0.001 | <0.001 | ||||||
| Adenocarcinoma | 30, 522 | 64±12 | 215,169 | 69±12 | 20,774 | 66±13 | |||
| Mucinous carcinoma | 383 | 63±13 | 3,326 | 68±13 | 216 | 67±14 | |||
| Number of lymph nodes | <0.001 | <0.001 | <0.001 | ||||||
| <12 | 8,618 | 66±12 | 72,386 | 70±12 | 7,235 | 68±13 | |||
| ≥12 | 22,287 | 64±13 | 146,109 | 69±13 | 13,755 | 65±14 | |||
| Tumor site | <0.001 | <0.001 | <0.001 | ||||||
| RCC | 16,413 | 66±12 | 107,706 | 73±12 | 7,572 | 70±13 | |||
| LCC | 9,129 | 63±12 | 60,004 | 67±13 | 7,635 | 65±13 | |||
| Rectum | 5,363 | 61±12 | 50,785 | 64±13 | 5,783 | 62±13 | |||
| Tumor sizes (mm) | <0.001 | <0.001 | <0.001 | ||||||
| ≤40 | 12,958 | 65±12 | 97,720 | 70±13 | 10.009 | 67±13 | |||
| 40–70 | 11,227 | 64±13 | 73,224 | 70±14 | 6,941 | 66±14 | |||
| ≥70 | 6,720 | 63±13 | 47,551 | 67±14 | 4,040 | 64±14 | |||
Abbreviations: LCC, left-sided colon cancer; RCC, right-sided colon cancer.