Selenium level and depressive symptoms in a rural elderly Chinese cohort

BMC Psychiatry

Table 3 Results of analysis of covariance (ANCOVA) models between selenium tertile groups and depressive symptoms measured by GDS score adjusting for other factors (n = 1735) ^a

	Without Cognitive Score			With Cognitive Score
Variable	Estimate	Std Err	p-value	Estimate	Std Err	p-value
Age, years	0.10	0.03	0.0002	0.01	0.03	0.6132
Attended school vs no school	−1.39	0.29	<0.0001	−0.49	0.29	0.0932
Live alone	1.35	0.36	0.0002	1.47	0.34	<0.0001
Ever drink alcohol	−1.03	0.29	0.0005	−0.74	0.29	0.0095
Body mass index	−0.12	0.04	0.0016	−0.05	0.04	0.1311
History of stroke	1.98	0.86	0.0209	1.73	0.83	0.0364
History of heart attack	3.34	0.80	<0.0001	3.59	0.78	<0.0001
History of head injury	2.67	0.72	0.0002	2.43	0.69	0.0005
History of fracture	2.92	1.05	0.0054	2.64	1.01	0.0091
Selenium tertile group, μg/g
<0.32	0.96	0.35	0.0063	0.58	0.34	0.0876
[0.32, 0.47)	0.42	0.34	0.2143	0.29	0.32	0.3712
≥ 0.47	reference	--	--	reference	--	--
Cognitive score quartile groups
Q4 (75 % to 100 %)				−4.61	0.42	<0.0001
Q3 (50 % to 75 %)				−2.64	0.39	<0.0001
Q2 (25 % to 50 %)				−1.43	0.38	0.0001
Q1 (0 to 25 %)				reference	--	--

ISSN: 1471-244X