Table 3 The combined effect of the amount and duration of green tea consumption on the risk of CVD, stroke, and CHD

Total CVD

 < 2.5 g/day

< 30 years

40

21.98

1

≥ 30 years

76

35.53

1.08 (0.73–1.60)

0.699

 ≥ 2.5 g/day

< 30 years

52

21.16

0.96 (0.63–1.46)

0.847

≥ 30 years

168

33.25

0.99 (0.691.43)

0.977

Stroke

 < 2.5 g/day

< 30 years

28

15.39

1

≥ 30 years

53

24.78

1.08 (0.67–1.72)

0.761

 ≥ 2.5 g/day

< 30 years

36

14.65

0.98 (0.59–1.62)

0.937

≥ 30 years

112

22.16

0.95 (0.61–1.46)

0.805

CHD

 < 2.5 g/day

< 30 years

18

9.89

1

≥ 30 years

30

14.02

0.95 (0.52–1.73)

0.862

 ≥ 2.5 g/day

< 30 years

20

8.14

0.80 (0.42–1.53)

0.507

≥ 30 years

69

13.65

0.90 (0.52–1.54)

0.700