Risk factors, prognostic factors, and nomograms for distant metastasis in patients with diagnosed duodenal cancer: A population-based study

Table 2 Univariate and multivariate logistic analyses of distant metastasis in duodenal cancer patients

	Univariate analysis			Multivariate analysis
	OR	95%CI	P value	OR	95%CI	P value
Age, yr
< 60	Reference
60-70	1.164	0.939-1.445	0.246
> 70	1.266	1.032-1.554	0.058
Race
Black	Reference
White	1.013	0.817-1.265	0.92
Other	1.014	0.722-1.413	0.946
Sex
Female	Reference			Reference
Male	1.245	1.050-1.477	0.035	1.165	0.965-1.408	0.183
Marital status
Married	Reference
Single	1.056	0.888-1.254	0.603
Income
$50000-$70000	Reference
< $50000	0.789	0.603-1.021	0.137
> $70000	1.279	1.065-1.536	0.027
PRCDA
No	Reference
Yes	1.118	0.925-1.347	0.330
T
T1-T2	Reference			Reference
T3-T4	5.926	4.832-7.316	< 0.001	1.779	1.360-2.336	< 0.001
N
N0	Reference			Reference
N1-N2	2.719	2.289-3.233	< 0.001	1.306	1.070-1.595	0.027
Grade
I	Reference			Reference
II	4.119	3.072-5.579	< 0.001	2.174	1.560-3.053	< 0.001
III-IV	16.616	12.710-22.039	< 0.001	7.819	5.689-10.870	< 0.001
Tumor size, mm
< 25	Reference			Reference
≥ 25	5.976	4.822-7.469	< 0.001	1.649	1.249-2.186	0.003
Histological type
Adenocarcinoma	Reference
Carcinoid tumor	0.106	0.078-0.142	< 0.001
Other	0.740	0.612-0.894	0.009

PRCDA: Purchased Referred Care Delivery Area.