Table 3—

Multivariate RR of type 2 diabetes according to quintile of magnesium intake among two subgroups stratified by BMI in the WHS

Quintile
P for trend
1 (lowest)2345 (highest)
Total magnesium intake
 Median intake (mg/day)255296328365433
  BMI <25 kg/m21.002.00 (1.07–3.72)1.36 (0.70–2.65)1.09 (0.55–2.18)1.85 (0.99–3.46)0.28
  BMI ≥25 kg/m21.000.96 (0.79–1.18)0.76 (0.61–0.94)0.84 (0.67–1.05)0.78 (0.62–0.99)0.02
Dietary magnesium
 Median intake (mg/day)252291319349399
  BMI <25 kg/m21.001.78 (0.94–3.35)1.61 (0.85–3.08)1.11 (0.56–2.23)1.77 (0.95–3.32)0.29
  BMI ≥25 kg/m21.000.93 (0.76–1.14)0.87 (0.71–1.08)0.81 (0.65–1.01)0.77 (0.61–0.98)0.02
  • Data are RRs (95% CI). Multivariate RR was adjusted for age (continuous), smoking (current, past, and never), 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), as well as further adjustment for BMI (three categories).