Table 2—

RRs of type 2 diabetes according to quintiles of total and dietary intake of magnesium in the WHS

Quintile
P for trend
1 (lowest)2345 (highest)
Total magnesium intake
 Median intake (mg/day)255296328365433
 Cases230217162155154
 Person-years44,29144,48244,58644,63444,530
 Age adjusted1.000.92 (0.77–1.11)0.68 (0.55–0.83)0.64 (0.52–0.78)0.62 (0.51–0.77)<0.001
 Age and BMI adjusted1.001.02 (0.84–1.23)0.77 (0.63–0.95)0.80 (0.65–0.99)0.82 (0.67–1.02)0.007
 Multivariate model1.001.06 (0.88–1.28)0.81 (0.66–1.00)0.86 (0.70–1.06)0.89 (0.71–1.10)0.05
Dietary magnesium intake
 Median intake (mg/day)252291319349399
 Cases229204185155145
 Person-years44,28344,42844,54544,65544,612
 Age adjusted1.000.87 (0.72–1.06)0.78 (0.64–0.94)0.64 (0.52–0.79)0.59 (0.48–0.73)<0.001
 Age and BMI adjusted1.000.97 (0.80–1.18)0.91 (0.74–1.11)0.79 (0.64–0.97)0.82 (0.66–1.02)0.01
 Multivariate model1.001.00 (0.83–1.22)0.96 (0.79–1.18)0.84 (0.68–1.04)0.88 (0.71–1.10)0.09
  • Data are RRs (95% CI). The multivariate model was adjusted for age (continuous), smoking (current, past, and never), BMI (continuous), exercise (rarely/never, <1 time/week, 1–3 times/week, and ≥4 times/week), alcohol use (rarely/never, 1–3 drinks/month, 1–6 drinks/week, and ≥1 drink/day), family history of diabetes (yes or no), and total calories (quintiles).