Table 2 General characteristics of study participants by energy-adjusted quartiles of Mg intake
| Â | 1st quartile (193) | 2nd quartile (196) | 3rd quartile (195) | 4th quartile (194) | p- value* |
|---|---|---|---|---|---|
Age | 45.7 ± 10.2 | 44.2 ± 10.7 | 43.4 ± 10.9 | 46.6 ± 10.4 | 0.01 |
Female % | 60.6 | 75.0 | 76.9 | 68.0 | 0.01 |
Education | Â | Â | Â | Â | 0.16 |
  Under diploma | 74 (38.3%) | 68 (34.7%) | 64 (32.9%) | 76 (39.2%) |  |
  Diploma and higher | 119 (61.7%) | 128 (65.3%) | 131 (67.1%) | 118 (60.8%) |  |
Smoking status | Â | Â | Â | Â | 0.04 |
  Never or former smoker | 179 (92.7%) | 191 (97.4%) | 188 (96.4%) | 181 (93.3%) |  |
  Current smoker | 14 (7.3%) | 5 (2.6%) | 7 (3.6%) | 13 (6.7%) |  |
Physical activity | Â | Â | Â | Â | 0.69 |
  Low | 121 (62.7%) | 123 (62.8%) | 119 (61.0%) | 127 (65.5%) |  |
  Moderate and higher | 72 (37.3%) | 73 (37.2%) | 76 (39.0%) | 67 (34.5%) |  |
Occupation | Â | Â | Â | Â | 0.01 |
  Employee | 49 (25.4%) | 54 (27.6%) | 52 (26.7%) | 34 (17.5%) |  |
  Housekeeper | 111 (57.5%) | 112 (57.1%) | 110 (56.4%) | 116 (59.8%) |  |
  Retired | 33 (17.1%) | 20 (10.2%) | 23 (11.8%) | 40 (20.6%) |  |
  Unemployed | 0 (0%) | 10 (5.1%) | 10 (5.1%) | 4 (2.1%) |  |
Marital status | Â | Â | Â | Â | 0.16 |
  Single | 14 (7.3%) | 25 (12.8%) | 24 (12.3%) | 17 (8.8%) |  |
  Married | 167 (86.5%) | 154 (78.5%) | 159 (81.5%) | 155 (79.9%) |  |
  Divorced | 12 (6.2%) | 17 (8.7%) | 12 (6.2%) | 22 (11.3%) |  |
Energy | 2818 ± 691 | 2247 ± 585 | 2121 ± 704 | 1985 ± 681 |  < 0.001 |
  Total Mg intake (mg/day) | 200 ± 48.3 | 232 ± 61.9 | 269 ± 90.3 | 385 ± 160 |  < 0.001 |
  Magnesium intake/ 1000 kcal | 72.6 ± 13.1 | 103 ± 6.36 | 127 ± 7.72 | 198 ± 71.3 |  < 0.001 |