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. Author manuscript; available in PMC: 2023 Sep 1.
Published in final edited form as: J Surg Oncol. 2022 Jun 14;126(4):748–756. doi: 10.1002/jso.26970

Table 1.

Characteristics of the cohort by receipt of AC.

No Adjuvant Chemotherapy (n=46656) Adjuvant Chemotherapy (n=9268) Chi Square P
n (%)
Age <65 years 15309 (32.8) 6298 (68) <0.001
>65 years 31347 (67.2) 2970 (32)
Sex Male 22246 (47.7) 4737 (51.1) <0.001
Female 24410 (52.3) 4531 (48.9)
Race White 38985 (83.6) 7505 (81) <0.001
Black 5349 (11.5) 1274 (13.7)
Asian/Polynesian 1463 (3.1) 307 (3.3)
Other/Unknown 859 (1.8) 182 (2)
Hispanic No 42876 (94.6) 8306 (92.3) <0.001
Yes 2437 (5.4) 695 (7.7)
Insurance Status Insured 44648 (96.8) 8552 (93.5) <0.001
Uninsured 1454 (3.2) 593 (6.5)
CDC Score 0 30268 (64.9) 6993 (75.5) <0.001
1 10990 (23.6) 1772 (19.1)
2 3531 (7.6) 369 (4)
3 1867 (4) 134 (1.4)
Tumor Size < 5cm 20315 (43.5) 3310 (35.7) <0.001
>= 5cm 19684 (42.2) 4696 (50.7)
Unknown 6657 (14.3) 1262 (13.6)
T Stage T3 42003 (90.3) 5840 (63.5) <0.001
T4A 2811 (6) 1783 (19.4)
T4B 1722 (3.7) 1571 (17.1)
Grade Grade 1–2 39573 (84.8) 7403 (79.9) <0.001
Grade 3–4 7083 (15.2) 1865 (20.1)
Lymphovascular Invasion No 40647 (87.1) 7228 (78) <0.001
Yes 6009 (12.9) 2040 (22)
Perineural Invasion No 43668 (93.6) 8134 (87.8) <0.001
Yes 2988 (6.4) 1134 (12.2)
Lymph Node Harvest >12 nodes 43568 (93.4) 8440 (91.1) <0.001
<12 nodes 3088 (6.6) 828 (8.9)
Margin Negative 45546 (97.6) 8480 (91.5) <0.001
Positive 1110 (2.4) 788 (8.5)
Location Right Colon 24597 (54.2) 3634 (40.4) <0.001
Transverse Colon 5409 (11.9) 966 (10.7)
Left Colon 4690 (10.3) 1216 (13.5)
Sigmoid Colon 10693 (23.6) 3177 (35.3)