Meta-Analysis of the Association between Vitamin D Receptor Polymorphisms and the Risk of Autoimmune Thyroid Disease

Table 1

The main characteristics of all included articles.

First author	Year of publication	Region	Ethnicity	Cases	Controls	Genotyping method	Polymorphisms
Giovinazzo [13]	2016	Italy	European	100 HT	100	PCR–RFLP	rs731236, rs7975232, rs1544410
Guleryuz [33]	2016	Turkey	Asian	136 HT	50	PCR–RFLP	rs731236, rs2228570
Long [14]	2015	China	Asian	260 GD	221	PCR–RFLP	rs7975232
Meng [15]	2015	China	Asian	417 GD and 250 HT	301	MALDI-TOF-MS	rs731236, rs7975232, rs2228570, rs1544410
Djurovic [16]	2015	Serbia	European	44 HT	32	PCR–RFLP	rs731236, rs7975232, rs2228570
Inoue [17]	2014	Japan	Asian	139 GD and 116 HT	76	PCR–RFLP	rs731236, rs7975232, rs2228570, rs1544410
Yu [18]	2013	China	Asian	75 HT	80	PCR–RFLP	rs1544410
Yazici [19]	2013	Turkey	Asian	111 HT	159	PCR–RFLP	rs731236, rs7975232, rs2228570, rs1544410
El Gawad [34]	2012	Egypt	African	90 GD	55	PCR–RFLP	rs731236, rs7975232, rs1544410
Hong [20]	2011	China	Asian	82 HT	80	PCR–RFLP	rs2228570
Huo [21]	2010	China	Asian	120 GD and 115 HT	120	PCR–RFLP	rs1544410
Horst-Sikorska [22]	2008	Poland	European	75 GD	163	PCR–RFLP	rs731236, rs7975232, rs2228570, rs1544410
Maalej [23]	2008	Tunisia	African	100 AITD	100	PCR–RFLP	rs731236, rs2228570, rs1544410
Jing [24]	2008	China	Asian	115 HT	120	PCR–RFLP	rs1544410
Stefanić [25]	2008	Croatia	European	145 HT	145	PCR–RFLP	rs731236, rs7975232, rs1544410
Chen [31]	2007	Taiwan	Asian	88 GD	90	PCR–RFLP	rs2228570
Lin [26]	2006	Taiwan	Asian	109 HT	90	PCR–RFLP	rs2228570
Ramos-Lopez [27]	2005	Germany, Poland, Serbia	European	789 GD	823	PCR–RFLP	rs731236, rs7975232, rs2228570, rs1544410
Stefanić [28]	2005	Croatia	European	110 GD	99	PCR–RFLP	rs731236, rs7975232, rs1544410
Kang [29]	2005	China	Asian	102 GD	120	PCR–RFLP	rs7975232, rs1544410
Collins [32]	2004	United Kingdom	European	768 GD	864	PCR–RFLP	rs731236, rs7975232, rs2228570, rs1544410
Ban [30]	2000	Japan	Asian	180 GD	195	PCR–RFLP	rs7975232, rs2228570, rs1544410

PCR–RFLP: polymerase chain reaction-restriction fragment length polymorphism; MALDI-TOF-MS: matrix-assisted laser desorption ionization-time of flight mass spectrometry.