Table 2.

Predictors of adherence to ACOVE-3 preoperative staging guidelines in 37,862 Medicare beneficiaries who underwent colectomy for colon cancer. Odds ratios (ORs) and confidence intervals (CIs) are adjusted for age, gender, SEER registry, rural-urban residence location, tumor location, census-tract median household income, census-tract education, and all of the variables listed in the table.

Variable	Adjusted odds ratio	95% CI
Race/ethnicity
Caucasian	Reference
Black	1.13	1.02–1.25
Other	1.33	1.21–1.45
Marital status
Married	Reference
Widowed	1.03	0.98–1.09
Single, separated or divorced	1.05	0.97–1.13
Unknown	0.94	0.83–1.06
Hospitalization in the previous year	1.35	1.28–1.41
No	Reference
Yes	1.35	1.29–1.42
Stage
Stage I	Reference
Stage II	1.2	1.13–1.27
Stage III	1.2	1.12–1.27
Unstaged	1.23	1.09–1.39
Tumor grade
Well differentiated	Reference
Mod. differentiated	1.10	1.02–1.19
Poorly or undiff.	1.22	1.12–1.34
Unknown	0.83	0.73–0.95
Acuity of admission
Emergent	Reference
Urgent	1.18	1.12–1.25
Others	0.85	0.79–0.91