Table 2 Hazard ratios (95% confidence intervals) of stroke according to quartiles of dietary calcium, magnesium, and phosphorus intakes

From: Dietary calcium, magnesium, and phosphorus intakes and risk of stroke in Chinese adults

 

Dietary nutrition intake

P for trend1

Q 1 (low)

Q 2

Q 3

Q 4 (high)

Calcium

Median intake (mg/d)

222

321

413

677

 

Person-years

5748

6705

6770

6021

 

Stroke cases (n)

52

51

43

33

 

Model 1

1.00

0.87 (0.59, 1.28)

0.72 (0.48, 1.08)

0.59 (0.38, 0.92)

0.01

Model 2

1.00

0.90 (0.60, 1.35)

0.65 (0.42, 1.02)

0.59 (0.37, 0.94)

0.02

Model 3

1.00

0.87 (0.57, 1.34)

0.66 (0.41, 1.07)

0.53 (0.29, 0.96)

0.03

Magnesium

Median intake (mg/d)

200

265

320

443

 

Person-years

5466

6625

6798

6356

 

Stroke cases (n)

53

39

41

46

 

Model 1

1.00

0.66 (0.43, 1.00)

0.70 (0.46, 1.06)

0.77 (0.51, 1.17)

0.43

Model 2

1.00

0.69 (0.44, 1.07)

0.72 (0.46, 1.12)

0.96 (0.62, 1.48)

0.85

Model 3

1.00

0.76 (0.47, 1.21)

0.78 (0.47, 1.31)

0.97 (0.51, 1.85)

0.90

Phosphorus

Median intake (mg/d)

667

875

1043

1393

 

Person-years

5732

6618

6722

6172

 

Stroke cases (n)

61

46

28

44

 

Model 1

1.00

0.70 (0.48, 1.04)

0.41 (0.26, 0.64)

0.67 (0.45, 1.01)

0.05

Model 2

1.00

0.75 (0.49, 1.12)

0.41 (0.25, 0.66)

0.80 (0.52, 1.24)

0.26

Model 3

1.00

0.84 (0.53, 1.31)

0.47 (0.26, 0.85)

0.92 (0.41, 2.03)

0.82

  1. 1Tests for trend were conducted by modeling the median of each quartile-defined category as a continuous variable in Cox proportional hazards models.
  2. Model 1, adjusted for age and sex.
  3. Model 2, further adjusted for urbanization index, education, household income, smoking status, alcohol intake, physical activity, BMI, hypertension, diabetes, myocardial infarction, and medication use based on model 1.
  4. Model 3, further adjusted for energy, whole grain, red meat, fruits, vegetables, saturated fat, polyunsaturated fat, cereal fiber, Na, K, and cholesterol intakes based on model 2.
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