Table 3.

Cox Regression Predicting Overall Survival

Parameter		HR (95% CI)	P-value
Diagnosis Location	ED	1.89 (1.26–2.85)	0.0023
	Non-ED	Ref
Age (years)	≥18 to <50	0.63 (0.27–1.43)	0.2659
	≥50 to <65	ref	Ref
	≥65 to <80	1.80 (0.93–3.47)	0.0804
	≥80	2.37 (1.20–4.68)	0.013
Number of comorbidities	0	ref	Ref
	1	0.23 (0.07–0.81)	0.0221
	2	0.30 (0.10–0.88)	0.0284
	3+	0.57 (0.21–1.52)	0.2575
	Unknown	0.55 (0.14–2.22)	0.4018
Insurance	Private	ref	Ref
	Medicare	1.99 (1.13–3.51)	0.0176
	Medicaid	2.17 (1.12–4.23)	0.0222
	Other	1.48 (0.33–6.70)	0.6132
Stage	1	Ref	Ref
	2	1.51 (0.70–3.24)	0.2938
	3	1.61 (0.75–3.43)	0.2189
	4	7.90 (3.92–15.93)	<0.0001
Gender	Male	0.81 (0.57–1.13)	0.2093
	Female	Ref	Ref
Race	White	Ref	Ref
	Black	0.78 (0.53–1.15)	0.2037
	Other	0.53 (0.33–0.83)	0.0055
Grade	I and II	Ref	Ref
	III	2.10 (1.38–3.19)	0.0006
	Unknown	1.79 (1.15–2.77)	0.0099
Symptom	yes	0.91 (0.54–1.56)	0.74
	no	ref	Ref
Prior Colonoscopy	Yes	1.14 (0.73–1.78)	0.5726
	No	Ref	Ref
	Unknown	1.31 (0.86–2.00)	0.2092