Table 1.
Baseline characteristics according to quintile of dietary magnesium intake.
| Quintile of Dietary Magnesium Intake (mg/day) | ||||||
|---|---|---|---|---|---|---|
| Q1 (<225.89 mg/day) |
Q2 (225.89~256.12 mg/day) |
Q3 (256.12~287.23 mg/day) |
Q4 (287.23~329.91 mg/day) |
Q5 (≥329.91 mg/day) |
p-Value | |
| Age, % | 0.22 | |||||
| 18~49 | 51.31 | 53.48 | 51.92 | 48.98 | 48.81 | |
| 50~64 | 36.15 | 33.82 | 33.58 | 36.61 | 37.10 | |
| 65~ | 12.54 | 12.69 | 14.50 | 14.41 | 14.09 | |
| Male, % | 49.51 | 44.64 | 45.37 | 45.45 | 46.36 | 0.13 |
| Household incomeper capita, % | <0.05 | |||||
| Low | 27.62 | 31.20 | 34.97 | 36.20 | 36.69 | |
| Median | 31.72 | 30.30 | 35.30 | 35.22 | 34.07 | |
| High | 40.66 | 38.49 | 29.73 | 28.58 | 29.24 | |
| Education, % | <0.05 | |||||
| Primary and below | 33.61 | 32.19 | 36.94 | 37.18 | 40.13 | |
| Middle and high | 47.62 | 46.19 | 46.6 | 46.93 | 45.21 | |
| College and above | 18.77 | 21.62 | 16.46 | 15.89 | 14.66 | |
| Urban, % | 30.49 | 33.82 | 37.26 | 34.73 | 34.97 | <0.05 |
| Never smoked, % | 70.82 | 71.25 | 70.68 | 69.7 | 71.01 | 0.93 |
| Never drunk alcohol, % | 68.77 | 67.73 | 68.39 | 68.39 | 67.98 | 0.99 |
| Physical activity, % | <0.05 | |||||
| Low | 35.90 | 32.51 | 33.82 | 32.76 | 31.61 | |
| Median | 35.33 | 36.45 | 33.01 | 31.37 | 30.55 | |
| High | 28.77 | 31.04 | 33.17 | 35.87 | 37.84 | |
| BMI (kg/m2), % | 0.08 | |||||
| <18.5 | 6.72 | 7.21 | 6.63 | 7.37 | 5.16 | |
| 18.5~23.9 | 62.46 | 60.85 | 62.65 | 59.79 | 59.05 | |
| ≥24.0 | 30.82 | 31.94 | 30.71 | 32.84 | 35.79 | |
| Energy(kcal/day) | 2201.10 ± 795.07 | 2049.50 ± 658.96 | 2014.17 ± 611.07 | 2043.68 ± 625.45 | 2335.93 ± 744.84 | <0.05 |
| Dietary fibre (mg/day) | 9.02 ± 4.68 | 9.86 ± 5.15 | 10.83 ± 5.51 | 12.34 ± 5.67 | 18.44 ± 11.58 | <0.05 |
| Calcium (mg/day) | 295.52 ± 134.24 | 325.25 ± 142.77 | 368.85 ± 221.44 | 406.62 ± 167.17 | 554.98 ± 334.05 | <0.05 |
| WC (cm) | 79.69 ± 10.35 | 79.69 ± 9.66 | 79.85 ± 9.96 | 80.66 ± 9.53 | 80.83 ± 11.62 | <0.05 |
| TG (mmol/L) | 1.19 ± 0.70 | 1.19 ± 0.73 | 1.20 ± 0.73 | 1.19 ± 0.83 | 1.21 ± 0.90 | 0.99 |
| HDL-C(mmol/L) | 1.44 ± 0.34 | 1.47 ± 0.36 | 1.50 ± 0.38 | 1.50 ± 0.50 | 1.49 ± 0.40 | <0.05 |
| SBP (mmHg) | 120.43 ± 15.95 | 120.47 ± 16.43 | 121.58 ± 16.40 | 121.21 ± 16.27 | 122.47 ± 15.00 | <0.05 |
| DBP (mmHg) | 77.43 ± 9,85 | 77.53 ± 9,84 | 78.69 ± 9.92 | 78.29 ± 10.19 | 79.32 ± 9.42 | <0.05 |
| FPG (mmol/L) | 5.09 ± 0.87 | 5.13 ± 1.07 | 5.10 ± 0.87 | 5.02 ± 0.84 | 5.03 ± 0.97 | <0.05 |
Values are mean ± SD for continuous variables and percentage for categorical variables. WC: waist circumference; TG: triglyceride; HDL-C: high density lipoprotein cholesterol; SBP: systolic blood pressure; DBP: diastolic blood pressure; FPG: fasting plasma glucose.