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Table 2 The number of subjects included in each paper and association between the amount of coffee consumption and periodontitis

From: Association between coffee consumption and periodontal diseases: a systematic review and meta-analysis

Study

Events

Total

Events

Total

Odds ratio

Heterogeneity

Test for overall effect

Weight

M-H, Random, 95% CI

Year

Chi2

I2

Z

p

 

Coffee drinker

Non-coffee drinker

       

Zuccarello D. et al

92

175

9

31

5.3%

2.71 [1.18, 6.22]

2014

17.09

88%

1.27

0.20

Han K. et al

4606

13,895

832

2835

46.1%

1.19 [1.09, 1.30]

2016

    

Hong S.J. et al

8320

113,082

1613

21,773

48.6%

0.99 [0.94, 1.05]

2021

    

Overall

13,018

127,152

2454

24,639

100.0%

1.14 [0.93, 1.39]

     
 

High Intake

Low Intake

       

Han K. et al

3666

10,598

940

3297

44.3%

1.33 [1.22, 1.44]

2016

63.45

97%

0.26

0.79

Abbass M.M.S. et al

256

286

52

57

10.6%

0.82 [0.30, 2.21]

2020

    

Hong S.J. et al

6121

85,597

2199

27,485

45.0%

0.89 [0.84, 0.93]

2021

    

Overall

10,043

96,481

3191

30,839

100.0%

1.05 [0.73, 1.52]

     
 

Low Intake

No Intake

       

Han K. et al

940

3297

832

2835

43.4%

0.96 [0.86, 1.07]

2016

3.54

72%

0.48

0.63

Hong S.J. et al

2199

27,485

1613

21,773

56.6%

1.09 [1.02, 1.16]

2021

    

Overall

3139

30,782

2445

24,608

100.0%

1.03 [0.91, 1.16]

     
 

High Intake

No Intake

       

Han K. et al

3666

10,598

832

2835

49.2%

1.27 [1.16, 1.39]

2016

26.39

96%

0.71

0.48

Hong S.J. et al

6121

85,597

1613

21,773

50.8%

0.96 [0.91, 1.02]

2021

    

Overall

9787

96,195

2445

24,608

100.0%

1.10 [0.84, 1.45]