Table 2.

Univariate and multivariate analyses of risk factors for psychiatric disorders

	Crude HR (95% CI)	p-value	Adjusted HR (95% CI)	p-value
IDA	1.36 (1.31–1.41)	<  0.001	1.52 (1.45–1.59)	<  0.001
Age
≦ 50	1.00		1.00
> 50	1.04 (1.01–1.08)	0.017	1.04 (1.00–1.09)	0.081
Gender
Female	1.00		1.00
Male	0.71 (0.68–0.74)	<  0.001	0.65 (0.62–0.68)	<  0.001
Income level
Low	1.00		1.00
Intermediate	0.99 (0.96–1.02)	0.543	1.00 (0.96–1.03)	0.846
High	0.87 (0.81–0.93)	<  0.001	0.90 (0.84–0.97)	0.005
Comorbidity
Hypertension	1.20 (1.15–1.25)	<  0.001	1.13 (1.07–1.19)	<  0.001
DM	1.07 (1.02–1.13)	0.013	0.88 (0.82–0.94)	<  0.001
Dyslipidemia	1.30 (1.24–1.37)	<  0.001	1.23 (1.16–1.30)	<  0.001
Hyperthyroidism	1.34 (1.21–1.49)	<  0.001	1.19 (1.07–1.33)	0.001
Hypothyroidism	1.33 (1.11–1.60)	0.002	1.11 (0.92–1.33)	0.272
COPD	1.26 (1.20–1.32)	<  0.001	1.21 (1.16–1.27)	<  0.001
Stroke	1.11 (1.04–1.19)	0.003	0.95 (0.88–1.03)	0.205
CAD	1.27 (1.21–1.34)	<  0.001	1.13 (1.06–1.21)	<  0.001
CKD	1.05 (0.93–1.18)	0.466	0.87 (0.77–0.98)	0.024
Cirrhosis	0.87 (0.74–1.03)	0.108	0.82 (0.70–0.97)	0.023
Iron supplementation	1.14 (1.10–1.18)	<  0.001	0.82 (0.78–0.86)	<  0.001
Area
Urban	1.00		1.00
Suburban	0.98 (0.95–1.02)	0.347	0.98 (0.94–1.02)	0.263
Rural	0.92 (0.86–0.99)	0.034	0.90 (0.84–0.97)	0.009
Remote area	0.98 (0.90–1.08)	0.689	0.96 (0.87–1.05)	0.383

DM Diabetes mellitus, CAD Coronary artery disease, CKD Chronic kidney disease, COPD Chronic Obstructive Pulmonary Disease