Table 1.
Characteristics of the Study Population
| Total n=9820 | Low n=2351 | Reference n=5170 | High n=2299 | |
|---|---|---|---|---|
| Age, y | 65.1 (9.9) | 65.1 (10.2) | 64.9 (9.7) | 65.6 (10.0) |
| Women, n (%) | 5575 (56.8) | 1368 (58.2) | 2908 (56.2) | 1299 (56.5) |
| Body mass index, kg/m2 | 27.3 (4.2) | 27.8 (4.6) | 27.2 (4.1) | 26.8 (4.0) |
| Systolic blood pressure, mm Hg | 140 (21) | 141 (21) | 139 (21) | 140 (22) |
| Diastolic blood pressure, mm Hg | 79 (12) | 79 (12) | 79 (11) | 79 (12) |
| Smoking, n (%) | ||||
| Never | 2991 (30.8) | 661 (28.4) | 1600 (31.3) | 730 (32.2) |
| Former | 4549 (46.8) | 1094 (47.0) | 2406 (47.0) | 1049 (46.3) |
| Current | 2175 (22.4) | 574 (24.6) | 1112 (21.7) | 489 (21.6) |
| Alcohol use, n (%) | 8274 (85.2) | 1919 (82.5) | 4430 (86.6) | 1925 (84.9) |
| History of diabetes mellitus, n (%) | 1021 (10.4) | 466 (19.9) | 433 (8.4) | 122 (5.3) |
| History of myocardial infarction, n (%) | 494 (5.0) | 134 (5.7) | 237 (4.6) | 123 (5.4) |
| History of stroke, n (%) | 340 (3.5) | 92 (3.9) | 160 (3.1) | 88 (3.8) |
| History of heart failure, n (%) | 257 (2.6) | 69 (2.9) | 118 (2.3) | 70 (3.1) |
| eGFR, mL/min per 1.73 m2 | 81.5 (17.3) | 83.2 (20.0) | 81.8 (16.0) | 79.0 (17.0) |
| Serum magnesium, mmol/L | 0.84 (0.06) | 0.77 (0.04) | 0.85 (0.02) | 0.92 (0.04) |
| Total cholesterol, mmol/L | 5.7 (1.0) | 5.6 (1.0) | 5.7 (1.0) | 5.8 (1.1) |
| HDL cholesterol, mmol/L | 1.40 (0.41) | 1.38 (0.42) | 1.41 (0.40) | 1.40 (0.41) |
| Diuretic use, n (%) | 1017 (10.7) | 325 (14.2) | 418 (8.1) | 233 (10.6) |
Data are shown for nonimputed data, values are counts (valid percentages) or means (SD). Low magnesium group 0.34 to 0.80 mmol/L, reference group 0.81 to 0.88 mmol/L, high magnesium group 0.89 to 1.74 mmol/L. eGFR indicates estimated glomerular filtration rate; HDL, high‐density lipoprotein.