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Table 4 Hazard ratios (HRs) a and 95% CIs for total mortality in the National Health and Nutrition Examination Survey (NHANES) III (1988 to 2006)

From: Magnesium, vitamin D status and mortality: results from US National Health and Nutrition Examination Survey (NHANES) 2001 to 2006 and NHANES III

Magnesium intake (mg/day)

Serum vitamin D level (ng/ml)

Pfor trend

<20

20 to 31

32 to 39

≥40

Total mortality

Total

Cases

1,274

1,547

558

324

 

HR (95% CI)

1.00

0.83 (0.74 to 0.94)

0.80 (0.69 to 0.93)

0.79 (0.66 to 0.93)

<0.01

<264

Cases

848

786

249

143

 

HR (95% CI)

1.00

0.89 (0.74 to 1.08)

0.87 (0.69 to 1.08)

0.87 (0.64 to 1.20)

0.23

≥264

Cases

426

761

309

181

 

HR (95% CI)

1.00

0.77 (0.64 to 0.92)

0.73 (0.58 to 0.93)

0.70 (0.57 to 0.88)

<0.01

P for interaction

    

0.96

Cardiovascular mortality

Total

Cases

574

656

253

132

 

HR (95% CI)

1.00

0.73 (0.62 to 0.86)

0.77 (0.61 to 0.99)

0.73 (0.56 to 0.97)

0.04

<264

Cases

386

346

112

57

 

HR (95% CI)

1.00

0.83 (0.66 to 1.04)

0.88 (0.61 to 1.28)

0.91 (0.61 to 1.35)

0.45

≥264

Cases

188

310

141

75

 

HR (95% CI)

1.00

0.59 (0.44 to 0.80)

0.65 (0.44 to 0.95)

0.57 (0.38 to 0.87)

<0.05

P for interaction

    

0.03

Colorectal cancer mortality

Total

Cases

32

34

12

8

 

HR (95% CI)

1.00

0.84 (0.36 to 2.00)

0.80 (0.31 to 2.05)

0.50 (0.15 to 1.73)

0.31

<264

Cases

19

17

3

3

 

HR (95% CI)

1.00

1.17 (0.39 to 3.56)

0.79 (0.17 to 3.75)

0.85 (0.17 to 4.12)

0.73

≥264

Cases

13

17

9

5

 

HR (95% CI)

1.00

0.55 (0.16 to 1.85)

0.67 (0.17 to 2.64)

0.28 (0.03 to 2.25)

0.29

P for interaction

    

0.15

  1. aA Cox’s proportional hazards model was performed with the SURVEYPHREG procedure to estimate odds ratios and 95% confidence intervals. Models were adjusted for age, race, sex, BMI, education attainment, household income, smoking status, alcohol use, physical activity, month of blood collection, intakes of total energy, phosphorus, calcium and magnesium.