Table 1. Baseline Characteristicsa of HANDLS Study Participants by Tertile of Dietary Intake of Magnesium.
| Tertile of Dietary Intake of Magnesium (minimum-maximum, mg/1,000 kcal) | ||||
|---|---|---|---|---|
|
| ||||
| Tertile 1 (46.9-101.4) | Tertile 2 (101.4-131.8) | Tertile 3 (131.9-468.2) | P-value | |
| N | 418 | 417 | 417 | |
| Age, years | 45.8 (8.9) | 47.4 (9.0) | 49.1 (9.1) | <0.001 |
| African-American | 275 (65.8%) | 243 (58.3%) | 196 (46.0%) | <0.001 |
| Male | 190 (45.5%) | 187 (44.8%) | 134 (32.1%) | <0.001 |
| Education level, yearsb | 12 (11, 12) | 12 (11, 14) | 12 (12, 17) | <0.001 |
| Health insurance status | 254 (60.8%) | 292 (70.0%) | 317 (76.0%) | <0.001 |
| Poverty status | 183 (43.8%) | 178 (42.7%) | 112 (26.9%) | <0.001 |
| Smoking status | ||||
| Never smoker | 121 (28.9%) | 143 (34.3%) | 182 (43.6%) | |
| Former smoker | 60 (14.4%) | 82 (19.7%) | 119 (28.5%) | <0.001 |
| Current smoker | 237 (56.7%) | 192 (46.0%) | 116 (27.8%) | |
| Prevalent CAD | 7 (1.8%) | 21 (5.1%) | 10 (2.5%) | 0.01 |
| eGFR, mL/min/1.73 m2 | 99.8 (17.2) | 96.3 (17.1) | 94.3 (16.7) | <0.001 |
| Diabetes | 46 (11.0%) | 78 (18.7%) | 75 (18.0%) | 0.004 |
| HbA1c, %b | 5.7 (5.4, 6.0) | 5.7 (5.4, 6.1) | 5.6 (5.4, 6.0) | 0.36 |
| Hypertension | 69 (16.5%) | 63 (15.1%) | 67 (16.1%) | 0.85 |
| Systolic blood pressure, mm Hg | 119.1 (18.7) | 119.3 (19.2) | 119.4 (19.3) | 0.98 |
| Diuretic use | 19 (4.5%) | 32 (7.7%) | 32 (7.7%) | 0.11 |
| Body mass index, kg/m2 | 29.3 (7.4) | 30.0 (7.4) | 30.5 (8.1) | 0.06 |
| Dietary fiber, g/1,000 kcalb | 4.1 (3.3, 5.2) | 5.6 (4.4, 6.9) | 8.3 (6.2, 10.9) | <0.001 |
| Dietary sodium, mg/1,000 kcal | 1,516 (383) | 1,619 (424) | 1,642 (524) | <0.001 |
| Diet quality scorec | 35.2 (7.4) | 41.2 (8.3) | 52.8 (12.1) | <0.001 |
a
Mean (standard deviation) for continuous variables and n (%) for categorical variable, unless otherwise stated
b
Median (25th percentile, 75th percentile)
c
Diet quality was assessed using the Healthy Eating Index-2010.
CAD, coronary artery disease; eGFR, estimated glomerular filtration rate, HANDLS, Healthy Aging in Neighborhoods of Diversity across the Life Span