Table 2

Subgroup analyses relating magnesium to type 2 diabetes by characteristics of study designs and populations

GroupNumber of studiesRR (95% CI)PPheterogeneityI2 (%)Pinteraction
Total130.78 (0.73–0.84)<0.0010.0442.4
Geographic area0.64
 U.S.80.77 (0.71–0.83)<0.0010.0449.9
 Asia30.81 (0.71–0.91)0.0010.530
Duration (years)0.93
 ≤670.79 (0.73–0.85)<0.0010.0548.9
 >660.78 (0.75–0.82)<0.0010.1240.2
Sex0.95
 Men50.77 (0.73–0.81)<0.0010.850
 Women90.76 (0.70–0.83)<0.0010.0647.1
Family history of diabetes0.83
 Yes40.73 (0.62–0.85)<0.0010.420
 No40.71 (0.62–0.80)<0.0010.3115.7
BMI (kg/m2)0.13
 <2531.09 (0.76–1.56)0.760.1252.9
 ≥2560.73 (0.66–0.81)<0.0010.2128.1