Lack of Association between Interleukin-1β Gene Polymorphism (rs16944) and Chronic Periodontitis: From a Case-Control Studies to an Updated Meta-Analysis

Table 2

Information of eligible studies included in the meta-analysis.

First author	Disease	Year	Country	Ethnicity	Chronic periodontitis			Control			HWE in the control
					CC	CT	TT	CC	CT	TT
Amirisetty et al.	Chronic periodontitis	2014	India	Asian	9	6	14	6	17	8	0.57
Atanasovska-Stojanovska et al.		2013	Macedonia	Caucasian	42	60	12	143	118	40	0.05
Braosi et al.		2012	Brazil	Caucasian	24	28	12	16	29	13	0.98
Brett et al.		2005	United Kingdom	Caucasian	27	26	4	51	39	10	0.53
Fan		2009	China	Asian	41	78	58	36	67	36	0.67
Gore et al.		1998	United States	Caucasian	13	15	4	13	16	3	0.54
Huang and Zhang		2004	China	Asian	25	58	99	21	49	19	0.33
Karasneh et al.		2011	Jordan	Caucasian	19	44	37	11	40	29	0.63
Lopez et al.		2009	Chile	Caucasian	58	117	49	29	107	72	0.28
Shete et al.		2010	India	Asian	7	48	45	9	43	48	0.89
Soga et al.		2003	Japan	Asian	21	33	10	14	34	16	0.61
Tanaka et al.		2014	Japan	Asian	45	54	32	284	518	217	0.50
Trevilatto et al.		2011	Brazil	Brazilian	22	35	12	17	23	4	0.33
Yang		2008	China	Asian	11	20	13	18	21	10	0.40
Zhang		2009	China	Asian	24	54	25	38	61	27	0.78
Present study		2017	Korean	Asian	11	32	7	12	12	8	0.18

HWE: Hardy–Weinberg equilibrium.