Table 1.

Characteristics of studies included in the meta-analysis for association between OPN C6982T polymorphism and urolithiasis.

OPN rs1126616							Case (N)			Control (N)
Year	Author	Ethnicity	Genotyping	SOC	Case	Control	CC1	CT1	TT1	CC0	CT0	TT0
2013	Tugcu et al. [25]	Turkish	PCR-RFLP	PB	127	92	66	42	19	70	8	14
2013	Safarinejad et al. [26]	Asian	PCR-RFLP	PB	342	684	27	143	172	41	315	328
2012	Tekin et al. [27]	Turkish	PCR-RFLP	PB	64	50	27	27	10	33	13	4
2010	Gögebakan et al. [28]	Turkish	PCR-SSCP	PB	121	100	23	67	31	32	61	7
2000	Yamate et al. [14]	Asian	PCR-SSCP	PB	65	36	2	39	24	11	16	9

SOC: source of controls, PB: population-based study.