| |
Tertiles of serum Mg (mmol/L)
|
|---|
|
1 (≤0.86)
|
2 (0.87–0.91)
|
3 (≥0.92)
|
|---|
|
Number
|
4633
|
3720
|
4278
|
|
Median Mg level (mmol/L)
|
0.83
|
0.89
|
0.95
|
|
Sex (female, %)
|
45.3
|
42.5
|
40.9
|
|
Age (years)
|
52.1 ± 8.1
|
52.4 ± 8.1
|
52.5 ± 7.9
|
|
40–49 (%)
|
43.5
|
41.1
|
39.5
|
|
50–59 (%)
|
37.5
|
39.5
|
40.4
|
|
60–69 (%)
|
15.2
|
15.9
|
17.2
|
|
≥70 (%)
|
3.8
|
3.5
|
2.9
|
|
BMI (kg/m2)
|
24.5 ± 3.4
|
24.4 ± 3.3
|
24.4 ± 3.2
|
|
<25 (%)
|
57.6
|
59.2
|
58.6
|
|
≥25 (%)
|
42.4
|
40.8
|
41.4
|
|
Serum iron (μmol/L)
|
18.1 ± 6.5
|
18.4 ± 6.3
|
18.9 ± 6.5
|
|
Serum ferritin (μg/L)
|
78.4 ± 67.3
|
78.3 ± 68.2
|
81.5 ± 62.8
|
|
Serum calcium (mmol/L)
|
2.4 ± 0.1
|
2.4 ± 0.1
|
2.4 ± 0.1
|
|
Serum zinc (μmol/L)
|
13.1 ± 2.5
|
13.5 ± 2.6
|
13.7 ± 3.1
|
|
Serum copper (μmol/L)
|
16.1 ± 3.6
|
16.2 ± 3.4
|
16.8 ± 3.8
|
|
Serum phosphorus (mmol/L)
|
1.2 ± 0.2
|
1.2 ± 0.2
|
1.2 ± 0.2
|
|
Education (high school or above, %)
|
42.3
|
49.8
|
49.0
|
|
Occupation (manual labor, %)
|
20.1
|
17.2
|
17.5
|
-
Mg magnesium, BMI body mass index
