TABLE 1.
Cardiovascular disease risk factors and selected nutrient intakes in 88,375 women in the Nurses’ Health Study in 1980 according to quartile (Q) of magnesium intake1
| Magnesium intake (mg/d) |
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| Q1 | Q2 | Q3 | Q4 | |
| Range of magnesium (mg/d) | <261 | 261–300 | 301–345 | >345 |
| Median magnesium (mg/d) | 235 | 281 | 321 | 383 |
| No. of subjects | 30,071 | 21,415 | 19,182 | 17,707 |
| Age (y) | 46 ± 72 | 47 ± 7 | 47 ± 7 | 48 ± 7 |
| Current smoker (%) | 27 | 28 | 30 | 31 |
| Parental history of MI (%) | 13 | 12 | 13 | 14 |
| History of hypertension (%) | 18 | 16 | 15 | 16 |
| History of diabetes (%) | 2 | 2 | 2 | 3 |
| History of high cholesterol (%) | 5 | 5 | 6 | 7 |
| BMI (kg/m2) | 24.6 ± 4.8 | 24.3 ± 4.4 | 24.3 ± 4.2 | 24.3 ± 4.2 |
| Physical activity (MET-h/wk) | 3.6 ± 2.8 | 3.8 ± 2.9 | 4.0 ± 2.9 | 4.4 ± 2.9 |
| Current use of postmenopausal hormones (%) | 8 | 8 | 8 | 8 |
| Current aspirin use >22 d/mo (%) | 15 | 14 | 15 | 15 |
| Current use of thiazide diuretics (%) | 10 | 10 | 10 | 11 |
| Nutrients | ||||
| Potassium (mg/d) | 2209 ± 349 | 2690 ± 320 | 2996 ± 371 | 3488 ± 527 |
| Calcium (mg/d) | 574 ± 236 | 717 ± 272 | 804 ± 308 | 940 ± 341 |
| Vitamin D ( IU/d) | 274 ± 252 | 323 ± 279 | 354 ± 290 | 403 ± 322 |
| Long-chain omega-3 fatty acids (% of total energy) | 0.06 ± 0.04 | 0.08 ± 0.08 | 0.09 ± 0.07 | 0.11 ± 0.10 |
| Saturated fat (% of total energy) | 16.7 ± 3.6 | 15.9 ± 3.3 | 15.2 ± 3.3 | 13.7 ± 3.4 |
| Fiber (g/d) | 11.2 ± 3.6 | 13.2 ± 3.8 | 14.6 ± 4.3 | 17.5 ± 5.5 |
| Alcohol (g/d) | 5.8 ± 10.6 | 6.4 ± 10.2 | 6.8 ± 10.7 | 6.8 ± 10.7 |
1
All nutrients, except alcohol, were energy adjusted. MI, myocardial infarction; MET-h, metabolic equivalent task hours.
2
Mean ± SD (all such values).