Table 1. Baseline characteristics between anxiety disorder group and non-anxiety disorder group in 2000–2002.

Variables	Anxiety disorder
	No N = 96,104		Yes N = 24,066
	n	%	n	%	p-value
Sex					0.86
Women	61,768	64.3	15,482	64.3
Men	34,336	35.7	8,584	35.7
Age, years					1.00
30–44	29,292	27.0	7,323	26.9
45–54	24,764	22.8	6,191	22.8
55–64	18,029	16.6	4,524	16.6
≥65	24,019	22.1	6,028	22.2
Mean (SD)†	54.0	(14.3)	54.1	(13.9)	0.94
Urbanization level					<0.0001
1	28,742	29.9	6,374	26.5
2	27,506	28.6	6,785	28.2
3	16,749	17.4	3,959	16.5
4	12,966	13.5	4,020	16.7
5	10,140	10.6	2,928	12.2
Co-morbidity
Hypertension	25,678	26.7	10,732	44.6	<0.0001
Diabetes mellitus	9,089	9.5	2,798	11.6	<0.0001
Hyperlipidemia	12,401	12.9	5,932	24.7	<0.0001

Urbanization level: 1 indicate the highest level of urbanization and 5 the lowest

Chi-square test,

^†student T-test.

Hypertension: ICD-9-CM (A-code): 401–405 (A260 and A269), admission more than three times.

Diabetes mellitus: ICD-9-CM (A-code): 250 (A181), admission more than twice in the first year.

Hyperlipidemia: ICD-9-CM (A-code): 272 (A182), admission more than three times.