Table 1.
Descriptive characteristics by serum magnesium categories, the ARIC study, 2016-2017.
| Serum magnesium, mmol/L† |
|||||
|---|---|---|---|---|---|
| Overall | <0.75 | 0.75-<0.85 | 0.85-<0.95 | ≥0.95 | |
| N | 2513 | 478 | 986 | 1004 | 45 |
| Serum magnesium, mmol/L‡ | 0.82 (0.37-1.11) | 0.70 (0.37-0.74) | 0.82 (0.78-0.82) | 0.86 (0.86-0.95) | 0.99 (0.99-1.11) |
| Age, y | 79.2±4.6 | 79.0±4.6 | 79.2±4.6 | 79.3±4.7 | 79.9±4.5 |
| Women | 1445 (57.5) | 285 (59.6) | 549 (55.7) | 581 (57.9) | 30 (66.7) |
| Race | |||||
| White | 1893 (75.3) | 330 (69.0) | 734 (74.4) | 796 (79.3) | 33 (73.3) |
| Black | 620 (24.7) | 148 (31.0) | 252 (25.6) | 208 (20.7) | 12 (26.7) |
| Educational attaimnent | |||||
| <High school | 311 (12.4) | 70 (14.6) | 121 (12.3) | 116 (11.6) | 4 (8.9) |
| High school or GED | 1048 (41.7) | 212 (44.4) | 389 (39.5) | 424 (42.2) | 23 (51.1) |
| >High school | 1148 (45.7) | 195 (40.8) | 474 (48.1) | 462 (46.0) | 17 (37.8) |
| Current smoker | 173 (6.9) | 34 (7.1) | 69 (7.0) | 65 (6.5) | 5 (11.1) |
| Current drinker | 1247 (49.6) | 207 (43.3) | 491 (49.8) | 529 (52.7) | 20 (44.4) |
| Body mass index, kg/m2 | 28.3±5.3 | 29.7±5.7 | 28.3±5.2 | 27.6±5.0 | 27.0±4.7 |
| Diabetes | 574 (22.8) | 252 (52.7) | 203 (20.6) | 112 (11.2) | 7 (15.6) |
| Systolic blood pressure, mmHg | 135.0±18.9 | 136.7±19.8 | 134.6±18.3 | 134.7±18.9 | 134.7±20.3 |
| Diastolic blood pressure, mmHg | 67.2±10.6 | 67.7±10.6 | 67.2±10.6 | 67.2±10.4 | 61.9±10.6 |
| Antihypertensive medication use | 1922 (76.5) | 435 (91.0) | 745 (75.6) | 702 (69.9) | 40 (88.9) |
| Diuretics | 662 (26.3) | 179 (37.5) | 261 (26.5) | 207 (20.6) | 15 (33.3) |
| ACEi/ARB | 1195 (47.6) | 314 (65.7) | 466 (47.3) | 393 (39.1) | 22 (48.9) |
| Antiarrhytlunic medication use | 43 (1.7) | 7 (1.5) | 15 (1.5) | 20 (2.0) | 1 (2.2) |
| PPI medication use | 642 (25.6) | 166 (34.7) | 256 (26.0) | 213 (21.2) | 7 (15.6) |
| Digoxin medication use | 25 (1.0) | 9 (1.9) | 11 (1.1) | 5 (0.5) | 0 (0.0) |
| Magnesium supplement use | 57 (2.3) | 4 (0.8) | 19 (1.9) | 32 (3.2) | 2 (4.4) |
| Calcium supplement use | 531 (21.1) | 83 (17.4) | 205 (20.8) | 235 (23.4) | 8 (17.8) |
| Serum potassium, mmol/L | 4.1±0.4 | 4.1±0.4 | 4.1±0.4 | 4.2±0.4 | 4.2±0.4 |
| Prevalent coronary heart disease | 204 (8.1) | 43 (9.0) | 75 (7.6) | 79 (7.9) | 7 (15.6) |
| Prevalent heart failure | 193 (7.7) | 49 (10.3) | 72 (7.3) | 65 (6.5) | 7 (15.6) |
| Prevalent stroke | 100 (4.0) | 15 (3.1) | 40 (4.1) | 44 (4.4) | 1 (2.2) |
Abbreviations: Atherosclerosis Risk in Communities, ARIC; general education development, GED; angiotensin converting enzyme inhibitor / angiotensin receptor blocker, ACEi/ARB; proton pump inhibitor, PPI.
†
N (%) or mean ± standard deviation except where indicated otherwise
‡
Median (Range)