Table 2.

Relative risk of prevalent cases of SLE in Taiwan from 2001 to 2011 by using multiple Poisson regression*.

	All		Female		Male
	RR (95% C.I.)	p value	RR (95% C.I.)	p value	RR (95% C.I.)	p value
Year (per 1 year)	1.05(1.05–1.06)	< .0001	1.05(1.04–1.06)	< .0001	1.05(1.02–1.08)	0.0002
Sex (ref: Male)
Female	9.14(8.36–9.98)	< .0001	–	–	–	–
Age(ref: 10–19 years old)
20–29	3.63(3.17–4.14)	< .0001	3.55(3.08–4.09)	< .0001	4.45(2.98–6.63)	< .0001
30–39	4.45(3.91–5.08)	< .0001	4.56(3.97–5.24)	< .0001	3.44(2.29–5.17)	< .0001
40–49	4.72(4.14–5.39)	< .0001	4.86(4.23–5.58)	< .0001	3.49(2.32–5.24)	< .0001
50–59	3.73(3.25–4.28)	< .0001	3.85(3.33–4.44)	< .0001	2.62(1.69–4.04)	< .0001
60–69	2.66(2.28–3.11)	< .0001	2.67(2.26–3.15)	< .0001	2.60(1.61–4.20)	< .0001
70–79	2.04(1.70–2.46)	< .0001	1.85(1.51–2.26)	< .0001	3.63(2.25–5.87)	< .0001
Residential urbanization (ref: urban)
Sub-urban	0.95(0.90–1.01)	0.1046	0.96(0.90–1.02)	0.1813	0.91(0.75–1.10)	0.3244
Rural	0.99(0.89–1.09)	0.7691	0.95(0.85–1.05)	0.3272	1.36(1.03–1.79)	0.0303
Income (ref: < 30,000)
30,000–60,000	0.96(0.90–1.03)	0.2593	0.96(0.89–1.04)	0.2966	1.03(0.82–1.28)	0.8259
≥ 60,000	0.83(0.71–0.97)	0.0197	0.78(0.65–0.93)	0.0070	1.19(0.86–1.66)	0.2964

*Models were adjusted for calendar year, sex, age groups, urbanization and income levels.