| 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 |