Table 1.
Characteristics | Tumor Location | p-value | ||
---|---|---|---|---|
Low N=162 (%) |
Mid N=160 (%) |
High N=92 (%) |
||
Total | ||||
Age >65 years old | 55 (34.0) | 44 (27.5) | 33 (35.9) | 0.300 |
Female Sex | 54 (33.3) | 71 (44.4) | 31 (33.7) | 0.083 |
Non-white Race | 5 (3.1) | 5 (3.1) | 5 (5.4) | 0.574 |
Married | 104 (64.2) | 104 (65.0) | 68 (73.9) | 0.244 |
Public Insurance | 90 (55.6) | 76 (47.5) | 45 (48.9) | 0.318 |
Rurality | 0.421 | |||
Small rural | 60 (37.0) | 68 (42.5) | 29 (31.5) | |
Large rural | 24 (14.8) | 18 (11.3) | 16 (17.4) | |
Urban | 78 (48.2) | 74 (46.3) | 47 (51.1) | |
Income | 0.366 | |||
$35000 to 50000 | 46 (28.6) | 49 (30.8) | 22 (24.2) | |
$50001 to 75000 | 101 (62.7) | 92 (57.9) | 54 (59.3) | |
>$75000 | 14 (8.7) | 18 (11.3) | 15 (16.5) | |
Bachelor’s Degree | 0.436 | |||
<1st quartile | 42 (25.9) | 39 (24.4) | 19 (20.9) | |
1st-3rd quartile | 75 (46.3) | 88 (55.0) | 47 (51.7) | |
>3rd quartile | 45 (27.8) | 33 (20.6) | 25 (27.5) | |
Nodal stage | 0.125 | |||
N0 | 43 (2.6.5) | 50 (31.3) | 38 (41.3) | |
N1 | 90 (55.6) | 87 (54.4) | 45 (48.9) | |
N2 | 29 (17.9) | 23 (14.4) | 9 (9.8) | |
Overall Stage | 0.052 | |||
II | 43 (26.5) | 50 (31.3) | 38 (41.3) | |
III | 119 (73.5) | 110 (68.8) | 54 (58.7) | |
Nodal Yield ≥12 | 127 (78.4) | 117 (73.1) | 84 (91.3) | 0.003 |
Surgical Volume | 0.491 | |||
Low | 16 (10.5) | 22 (14.3) | 16 (17.8) | |
Medium | 35 (22.9) | 32 (20.8) | 15 (16.7) | |
High | 102 (66.7) | 100 (64.9) | 59 (65.6) | |
Surgery | <.001 | |||
Abdominoperineal Resection | 100 (64.5) | 22 (13.8) | * | |
Low Anterior Resection | 62 (35.5) | 138 (86.2) | 90 (97.8) | |
National Cancer Institute designated | 44 (28.6) | 40 (26.0) | 16 (17.6) | 0.150 |
Preoperative chemoradiation | 129 (79.6) | 124 (77.5) | 43 (46.7) | 0.001 |
Bolded p-values meet statistical significance (p <.05). Variables with cell counts below 5 were omitted and replaced with a “*” per Iowa Cancer Registry privacy policies.