Table 1.
Study population characteristics by metastatic pattern to the liver, lungs, or other site, SEER of the Seattle-Puget Sound region, 2010–2014
| Pattern of Metastasis | ||||
|---|---|---|---|---|
|
| ||||
| Liver Only [N=700] n (%) |
Lungs Only [N=83] n (%) |
Liver and Lungs [N=208] n (%) |
Other [N=211] n (%) |
|
| Primary Tumor Site | ||||
| Proximal colon | 267 (38) | 23 (28) | 49 (24) | 99 (47) |
| Distal colon | 213 (30) | 18 (22) | 68 (33) | 55 (26) |
| Rectum | 220 (31) | 42 (51) | 91 (44) | 57 (27) |
| T-stage* | ||||
| T1 – T2 | 44 (6) | 3 (4) | 12 (6) | 5 (2) |
| T3 | 273 (39) | 26 (31) | 49 (24) | 61 (29) |
| T4 | 160 (23) | 28 (34) | 47 (23) | 106 (50) |
| TX | 223 (32) | 26 (31) | 100 (48) | 39 (18) |
| N-stage* | ||||
| N0 | 141 (20) | 20 (24) | 33 (16) | 42 (20) |
| N1 | 242 (35) | 28 (34) | 72 (35) | 60 (28) |
| N2 | 192 (27) | 18 (22) | 43 (21) | 79 (37) |
| NX | 125 (18) | 17 (20) | 60 (29) | 30 (14) |
| M-stage* | ||||
| M1a | 525 (75) | 46 (55) | 3 (1) | 78 (37) |
| M1b | 170 (24) | 36 (43) | 204 (98) | 126 (60) |
| M1NOS | 5 (<1) | 1 (1) | 1 (<1) | 7 (3) |
| Age, in years | ||||
| <50 | 116 (17) | 14 (17) | 29 (14) | 35 (17) |
| 50 – 59 | 174 (25) | 14 (17) | 62 (30) | 50 (24) |
| 60 – 69 | 249 (36) | 29 (35) | 85 (41) | 64 (30) |
| ≥70 | 161 (23) | 26 (31) | 32 (15) | 62 (29) |
| Mean in years (SD) | 61 (10.9) | 62 (10.8) | 60 (10.2) | 62 (11.3) |
| Sex | ||||
| Male | 439 (63) | 48 (58) | 128 (62) | 107 (51) |
| Female | 261 (37) | 35 (42) | 80 (38) | 104 (49) |
| Race | ||||
| White | 577 (82) | 61 (73) | 173 (83) | 183 (87) |
| Non-white | 120 (17) | 20 (24) | 33 (16) | 27 (13) |
| Unknown | 3 (<1) | 2 (2) | 2 (1) | 3 (<1) |
| Ethnicity | ||||
| Hispanic | 27 (4) | 0 (0) | 6 (3) | 5 (2) |
| Non-Hispanic | 671 (96) | 83 (100) | 202 (97) | 206 (98) |
| Unknown * [7] | 2 (<1) | 0 (0) | 0 (0) | 0 (0) |