Table 2.

Univariate and multivariable Cox proportional hazard models of prostate cancer incidence

Variables	Univariate Models			Model 1			Model 2			Model 3			Model 4
	HR	(95% CI)	p-value	HR	(95% CI)	p-value	HR	(95% CI)	p-value	HR	(95% CI)	p-value	HR	(95% CI)	p-value
Group
Insured	1.00	(reference)		1.00	(reference)		1.00	(reference)		1.00	(reference)		1.00	(reference)
Dependents	1.89	(1.80–1.98)	< 0.001	1.04	(0.99–1.09)	0.149	0.96	(0.90–1.01)	0.118	1.01	(0.96–1.07)	0.711	0.98	(0.93–1.04)	0.515
Age, yrs
50–59	1.00	(reference)		1.00	(reference)		1.00	(reference)		1.00	(reference)		1.00	(reference)
60–69	5.38	(5.01–5.77)	< 0.001	5.32	(4.95–5.72)	< 0.001	5.51	(5.12–5.92)	< 0.001	5.47	(5.08–5.89)	< 0.001	5.48	(5.09–5.90)	< 0.001
70–79	12.02	(11.22–12.89)	< 0.001	11.89	(11.08–12.77)	< 0.001	12.61	(11.71–13.58)	< 0.001	12.43	(11.52–13.41)	< 0.001	12.44	(11.53–13.42)	< 0.001
Occupation
Labor	1.00	(reference)		–	–	–	1.00	(reference)		–	–	–	1.00	(reference)
Enterprise employee	0.81	(0.76–0.86)	< 0.001	–	–	–	1.17	(1.10–1.24)	< 0.001	–	–	–	1.14	(1.05–1.23)	0.002
Government employee	1.13	(1.03–1.23)	0.008	–	–	–	1.33	(1.21–1.46)	< 0.001	–	–	–	1.23	(1.10–1.39)	< 0.001
Income, TWD
17,881–21,900	1.00	(reference)		–	–	–	–	–	–	1.00	(reference)		1.00	(reference)
21,901–40,100	0.55	(0.51–0.58)	< 0.001	–	–	–	–	–	–	0.96	(0.90–1.03)	0.212	0.89	(0.82–0.96)	0.003
> 40,100	0.72	(0.68–0.76)	< 0.001	–	–	–	–	–	–	1.25	(1.18–1.33)	< 0.001	1.11	(1.02–1.21)	0.019

Models 1–4 are multivariable Cox proportional hazard models