Table 2.

Logistic regression models.

	Univariable			Multivariable
Variables (Categories)	Odds Ratios	[95% Conf Interval]		Adjusted Odds Ratios	[95% Conf Interval]
Sex	AUC = 0.52			AUC = 0.84
Male	[Ref]			[Ref]
Female	1.19	1.03	1.37	0.96	0.81	1.13
Age	AUC = 0.41
≤25	[Ref]			[Ref]
26–50	0.91	0.75	1.10	0.78	0.62	0.98
51–75	0.56	0.46	0.68	0.68	0.54	0.87
≥76	0.29	0.20	0.42	0.54	0.35	0.85
Race	AUC = 0.52
Non-Hispanic White	[Ref]			[Ref]
Non-Hispanic Black	1.61	1.29	2.01	1.23	0.95	1.60
Hispanic	0.99	0.73	1.35	0.76	0.54	1.09
Asian/Pacific Islander	1.03	0.62	1.70	1.29	0.71	2.32
Other	0.81	0.42	1.54	0.62	0.31	1.26
Charlson–Deyo Score	AUC = 0.48
0–1	[Ref]			[Ref]
≥2	0.44	0.31	0.63	0.74	0.49	1.12
Insurance status	AUC = 0.56
Not insured	0.96	0.66	1.38	0.91	0.59	1.40
Medicaid/Medicare/OG	0.54	0.46	0.63	0.78	0.64	0.95
Private	[Ref]			[Ref]
Unknown	0.42	0.20	0.88	0.39	0.17	0.88
Tumor differentiation	AUC = 0.56
Well differentiated	[Ref]			[Ref]
Moderately differentiated	2.07	1.67	2.61	1.25	0.96	1.64
Unknown	1.74	1.44	2.11	1.13	0.90	1.43
LVI	AUC = 0.70
Lymph vascular (−)	[Ref]			[Ref]
Lymph vascular (+)	7.43	6.23	8.86	4.09	3.37	4.97
Unknown	3.48	2.92	4.16	2.42	1.95	3.01
Tumor depth	AUC = 0.55
Confined to the appendiceal wall	[Ref]			[Ref]
Invading the subserosa and beyond	1.01	0.82	1.23	1.07	0.84	1.37
Unknown	0.68	0.57	0.81	0.79	0.64	0.97
Tumor size	AUC = 0.79
<1 cm	[Ref]			[Ref]
≥1 cm but <2 cm	6.21	4.81	8.01	4.16	3.18	5.43
≥2 cm	21.45	16.91	27.22	14.43	11.27	18.49
Surgical margins	AUC = 0.53
Negative margins	[Ref]			[Ref]
Positive margins	4.21	2.96	5.98	2.52	1.67	3.89
Unknown margins	2.26	1.39	3.67	2.32	1.29	4.20
All patients were included in the model (n = 5353).