Table 1.

Baseline clinicopathologic and demographic characteristics among n=188 patients enrolled in the ColoCare Study.

Age at surgery* (years)	62.7 ± 12.0
Sex, n (%)
Female	59 (31.4)
Male	129 (68.6)
Body mass index* (kg/m2)	26.2 ± 4.16
Smoking history, n (%)
Never smoker	61 (32.4)
Ever smoker	116 (61.7)
Unknown	11 (5.9)
Neoadjuvant treatment, n (%)
None	103 (54.8)
Yes	85 (45.2)
Tumor stage, n (%)
I	32 (17.0)
II	54 (28.7)
III	51 (27.1)
IV	51 (27.1)
Tumor site, n (%)
Colon	71 (38)
Rectum	117 (62)

^*Mean ± standard deviation; AJCC: American Joint Committee on Cancer; kg: kilogram; m: meters