From: Selenium level and depressive symptoms in a rural elderly Chinese cohort
N | Mean | SD | p-value | |
---|---|---|---|---|
Age group | ||||
65-74 | 1002 | 7.68 | 5.83 | <0.0001 |
75-84 | 652 | 9.02 | 5.86 | |
85+ | 83 | 9.38 | 5.55 | |
Gender | ||||
Male | 815 | 7.52 | 5.77 | <0.0001 |
Female | 922 | 8.92 | 5.87 | |
Ever attended school | ||||
Yes | 676 | 7.05 | 5.73 | <0.0001 |
No | 1061 | 9.04 | 5.82 | |
Marital status | ||||
Married | 1016 | 7.65 | 5.71 | <0.0001* |
Widowed | 704 | 9.08 | 5.91 | |
Other | 17 | 11.47 | 8.18 | |
Living arrangement# | ||||
With spouse | 828 | 7.39 | 5.69 | <0.0001 |
With children | 585 | 8.85 | 5.58 | |
Living alone | 311 | 9.60 | 6.51 | |
Body Mass Index tertiles | ||||
< 20.45 | 578 | 8.80 | 5.94 | 0.0025 |
[20.45, 23.24) | 577 | 8.38 | 6.02 | |
≥ 23.24 | 582 | 7.62 | 5.57 | |
Ever drink alcohol | ||||
Yes | 697 | 7.59 | 5.73 | <0.0001 |
No | 1040 | 8.72 | 5.91 | |
Smoking | ||||
Current smoker | 553 | 7.72 | 5.89 | 0.0013 |
Former smoker | 148 | 7.39 | 5.57 | |
Non-smoker | 1036 | 8.68 | 5.85 | |
History of Cancer | ||||
Yes | 33 | 8.85 | 6.51 | 0.5634 |
No | 1704 | 8.25 | 5.85 | |
History of Parkinson’s | ||||
Yes | 36 | 8.67 | 6.04 | 0.6774 |
No | 1701 | 8.26 | 5.86 | |
History of diabetes | ||||
Yes | 75 | 8.25 | 5.83 | 0.5435 |
No | 1662 | 8.67 | 6.64 | |
History of hypertension^ | ||||
Yes | 1029 | 8.36 | 5.83 | 0.4141 |
No | 708 | 8.13 | 5.91 | |
History of stroke# | ||||
Yes | 45 | 10.20 | 6.97 | 0.0245 |
No | 1690 | 8.21 | 5.83 | |
History of heart attack | ||||
Yes | 52 | 12.00 | 6.42 | >0.0001 |
No | 1685 | 8.15 | 5.81 | |
History of head injury | ||||
Yes | 66 | 11.42 | 6.44 | <0.0001 |
No | 1671 | 8.14 | 5.81 | |
History of fracture | ||||
Yes | 30 | 12.47 | 6.00 | <0.0001 |
No | 1707 | 8.19 | 5.83 | |
APOE e4 carriers | ||||
Yes | 291 | 8.51 | 5.69 | 0.4360 |
No | 1446 | 8.22 | 5.90 | |
Selenium tertiles, μg/g | 0.0132 | |||
Low (<0.32) | 561 | 8.83 | 5.64 | |
Medium [0.32, 0.47) | 582 | 8.16 | 5.79 | |
High (≥ 0.47) | 594 | 7.83 | 6.10 | |
Quartile groups defined by composite cognitive score | <0.0001 | |||
Q4 (75 % to 100 %) | 434 | 5.5 | 4.8 | |
Q3 (50 % to 75 %) | 434 | 7.7 | 5.7 | |
Q2 (25 % to 50 %) | 435 | 9.1 | 5.7 | |
Q1 (0 to 25 %) | 434 | 10.7 | 5.9 |