Table 2 Stratified analysis on the associations of dietary calcium intake and mortality from cardiovascular disease and all causes

Number

RR (95% CI)

P ^a

I ² (%)

Number

RR (95% CI)

P ^a

I ² (%)

Location:

United States

2

1.04 (0.98 to 1.10)

0.50

0.0

-

-

-

-

Europe

4

0.90 (0.73 to 1.12)

0.20

36.1

3

0.85 (0.68 to 1.06)

0.08

61.1

Asia

3

0.95 (0.81 to 1.12)

0.56

0.0

2

0.80 (0.52 to 1.23)

0.002

89.9

Sex:

Male and female

3

0.99 (0.70 to 1.39)

0.22

33.3

2

0.66 (0.53 to 0.82)

0.45

0.0

Male

5

0.88 (0.74 to 1.06)

0.06

55.2

2

0.91 (0.74 to 1.11)

0.14

54.7

Female

5

1.04 (0.95 to 1.13)

0.90

0.0

2

0.90 (0.63 to 1.29)

0.001

90.6

Follow-up time:

>10 years

6

1.03 (0.97 to 1.08)

0.46

0.0

3

0.98 (0.89 to 1.07)

0.56

0.0

≤10 years

3

0.87 (0.70 to 1.08)

0.28

21.5

2

0.71 (0.60 to 0.83)

0.26

22.0

Yes

4

0.92 (0.74 to 1.15)

0.22

32.7

2

0.87 (0.65 to 1.16)

0.03

80.0

No

5

1.02 (0.97 to 1.08)

0.44

0.0

3

0.79 (0.57 to 1.10)

0.006

80.7