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

BMC Oral Health

Table 3 The number of subjects included in each paper and association between coffee consumption and tooth loss

Study	Events	Total	Events	Total	Odds ratio			Heterogeneity		Test for overall effect
Study	Events	Total	Events	Total	Weight	M-H, Random, 95% CI	Year	Chi²	I²	Z	p
	Coffee drinker		Non-coffee drinker
Tanaka K. et al	171	597	85	405	44.7%	1.51 [1.12, 2.04]	2008	8.61	88%	0.71	0.48
Koyama Y. et al	5792	19,770	1742	5769	55.3%	0.96 [0.90, 1.02]	2010
Overall	5963	20,367	1827	6174	100.0%	1.17 [0.75, 1.83]

ISSN: 1472-6831