TABLE 3.

Univariate and multivariate logistic regression analyses of risk factors for patients with DM

Variable	Univariate			Multivariate
	OR	95% CI	p value	OR	95% CI	p value
Age			0.850
<65	Reference
≥65	0.990	0.893–1.098	0.850
Race			0.027			0.151
White	Reference			Reference
Black	0.777	0.626–0.965	0.023	0.861	0.675–1.100	0.231
Other	1.222	0.936–1.346	0.214	1.161	0.947–1.424	0.150
Sex			<0.001			0.234
Male	Reference			Reference
Female	0.675	0.605–0.752	<0.001	0.928	0.821–1.049	0.234
Grade a			<0.001			<0.001
Grade I	Reference			Reference
Grade II	1.862	1.360–2.550	<0.001	1.315	0.951–1.820	0.098
Grade III	6.908	5.079–9.394	<0.001	2.538	1.838–3.504	<0.001
Grade IV	24.848	18.139–34.037	<0.001	4.694	3.355–6.566	<0.001
Laterality			0.087
Left	Reference
Right	0.917	0.830–1.013	0.087
T stage			<0.001			<0.001
T1	Reference			Reference
T2	9.991	8.349–11.955	<0.001	7.177	5.965–8.636	<0.001
T3	15.203	13.071–17.683	<0.001	7.964	6.763–9.379	<0.001
T4	93.577	73.210–119.612	<0.001	34.118	26.023–44.733	<0.001
N stage			<0.001			<0.001
N0	Reference			Reference
N1	20.801	17.852–24.237	<0.001	5.873	4.959–6.957	<0.001
Insurance status			0.280
Insured	Reference
Uninsured	1.160	0.886–1.519	0.280
Marital status			0.347
Married	Reference
Previous married	0.959	0.840–1.094	0.533
Never married	0.904	0.785–1.040	0.158
Household income b			0.664
Low	Reference
High	0.978	0.885–1.081	0.664

The bold value means that the corresponding p of the variable is less than 0.05, with statistical significance.

Abbreviations: CI, confidence interval; DM, distant metastasis; OR, odds ratio.

^aGrade I = Well differentiated; Grade II = Moderately differentiated; Grade III = Poorly differentiated; Grade IV = Undifferentiated

^bMedian household income: defined by earnings above the median of the median household income in this sample.