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Table 2 Subgroup analyses of relative risk of gastric cancer

From: Coffee consumption and the risk of gastric cancer: a meta-analysis of prospective cohort studies

 

No of reports

Relative risk

(95 % CI)

I 2

P for heterogeneity

Sex

 

 Men

8

1.17

0.88–1.55

37.10 %

0.133

 Women

7

0.96

0.58–1.58

59.20 %

0.023

 Combined

5

1.21

0.96–1.51

0.00 %

0.604

Study quality

     

 Score > 7

13

1.10

0.85–1.43

47.10 %

0.030

 Score ≤ 7

7

1.20

0.94–1.53

20.10 %

0.276

Study location

     

 United States

5

1.36

1.06–1.75

0.00 %

0.536

 Europe

10

1.08

0.80–1.45

56.80 %

0.013

 Asia

5

0.92

0.66–1.28

0.00 %

0.532

Follow-up duration

     

 ≤10 year

5

1.25

1.01–1.55

0.00 %

0.493

 >10 year

15

1.06

0.82–1.37

47.10 %

0.022

Reference group

     

 None

8

1.10

0.81–1.49

17.30 %

0.294

 Low consumption

12

1.13

0.89–1.42

49.60 %

0.026

Specific dietary assessment method

     

 Yes

11

1.10

0.87–1.38

41.50 %

0.072

 No

9

1.17

0.85–1.61

40.30 %

0.099

Controlling age in models

     

 Yes

17

1.15

0.95–1.39

36.90 %

0.064

 No

3

0.88

0.42–1.85

61.90 %

0.073

Controlling smoking in models

     

 Yes

13

1.06

0.84–1.33

43.80 %

0.046

 No

7

1.29

0.97–1.71

21.80 %

0.263

Controlling BMI in models

 

 Yes

9

1.06

0.81–1.40

46.80 %

0.058

 No

11

1.19

0.92–1.53

33.70 %

0.129

Controlling alcohol intake in models

     

 Yes

9

1.20

0.91–1.59

59.20 %

0.012

 No

11

1.09

0.86–1.37

6.70 %

0.380

Controlling tea consumption in models

     

 Yes

6

1.09

0.74–1.62

67.60 %

0.009

 No

14

1.18

0.97–1.43

13.00 %

0.310

Statistical model*

     

 Unadjusted

4

0.94

0.56–1.57

45.20 %

0.140

 Adjusted

17

1.15

0.95–1.39

36.90 %

0.064

  1. Abbreviations: BMI body mass index
  2. *Study by Nilsson and colleagues reported results both statistical models for adjusted and unadjusted