Table 2

Associations and SEs of 50-mg/day Increments in Energy-Adjusted Self-Reported Total (Dietary and Supplemental) Magnesium Intake with CAC and AAC

ModelnβSEp Value
CAC as ln(AS + 1)
 Model 12,695−
 Model 2−
 Model 3−0.250.07<0.001
AAC as ln(AS + 1)
 Model 12,681−
 Model 2−
 Model 3−

Abbreviations as in Table 1.

  • Tobit regression analyses were adjusted as follows: model 1 adjusted for calcium and energy intake, age, sex, and exam cycle. Model 2 adjusted as for model 1, plus BMI, smoking status, SBP, fasting insulin, total-to-high-density lipoprotein cholesterol ratio, use of hormone replacement therapy (women only), menopausal status (women only), treatment for hyperlipidemia, hypertension or cardiovascular disease prevention, or diabetes, and alcohol intake. Model 3 adjusted as for model 2, plus intake of vitamins K and D, saturated fat, and fiber.

  • β Coefficients of Tobit regression can be interpreted as most linear regression coefficients on the natural log scale, that is, as percent changes per 50-mg/day increments in magnesium intake, obtained by exponentiating the coefficient and subtracting 1. For example, in model 3 of the CAC regression, the –0.25 β coefficient can be thought of as [e–0.25 – 1] = –22%, or 22% lower CAC per 50-mg/day increment in intake.