Table 1.

General Characteristics of the Included Studies in This Meta-Analysis.

Author, Year	Ethnicity	Control Source	Case				Control
			CC	TC	TT	Total	CC	TC	TT	Total
Murata et al, 20012	Asian	Hospital based	6	49	60	115	8	74	118	200
Suzuki et al, 20033	Asian	Hospital based	13	39	46	98	22	37	46	105
Chang et al, 20034	Mixed	Population based	0	36	188	224	6	39	135	180
Gao et al, 200317	Asian	Population based	9	33	16	58	15	61	36	112
Caceres et al, 20055	African	Population based	14	49	39	102	11	46	73	130
Guan et al, 200518	Asian	Population based	12	40	31	83	22	42	51	115
Vijayalakshmi et al, 20056	Asian	Hospital based	1	19	30	50	0	6	44	50
Quinones et al, 20067	African	Hospital based	8	38	14	60	13	46	58	117
Yang et al, 20068	Asian	Hospital based	33	116	76	225	42	112	96	250
Mittal and Srivastava, 20079	Asian	Population based	6	69	55	130	7	58	75	140
Li et al, 200810	Asian	Population based	30	100	78	208	44	84	102	230
Lima et al, 200811	Mixed	Hospital based	5	26	94	125	4	27	69	100
Wu et al, 200916	Asian	Hospital based	0	2	140	142	0	0	142	142
Kumar et al, 201012	Asian	Population based	18	31	21	70	16	31	24	71
Souiden et al, 201213	African	Population based	3	21	114	138	3	24	111	138
Holt et al, 201314	Caucasian	Population based	34	370	863	1267	28	311	897	1236
Mandic et al, 201415	Caucasian	Hospital based	0	17	103	120	0	20	100	120