The role of vitamin D receptor gene polymorphisms in gestational diabetes mellitus susceptibility: a meta-analysis

Table 1 Basic information of the original articles included in this meta-analysis

Site	First author	Ethnicity	Year	Design	Methods	Case			Control
BsmI (rs1544410)						GG	AA	GA	GG	AA	GA
	Qi Juan	Asian	2013	HBC	PCR–RFLP	0	58	22	0	70	10
	Hesham A	African	2015	PBC	PCR–RFLP	11	61	40	66	40	112
	Mahmut Apaydın	Caucasian	2019	HBC	PCR–RFLP	14	42	44	15	43	76
	Selvihan Beysel	Caucasian	2019	HBC	PCR–RFLP	45	53	63	36	57	52
	Beibei Zhu	Asian	2019	PBC	iMLDR	0	240	34	0	353	27
FokI (rs2228570)						TT	CC	TC	TT	CC	TC
	Hesham A	African	2015	PBC	PCR–RFLP	34	24	54	65	33	120
	Mahmut Apaydın	Caucasian	2019	HBC	PCR–RFLP	16	41	43	8	80	46
	Selvihan Beysel	Caucasian	2019	HBC	PCR–RFLP	40	76	44	24	78	43
ApaI (rs7975232)						CC	AA	CA	CC	AA	CA
	Hesham A	African	2016	HBC	PCR–RFLP	25	51	81	9	55	93
	Mahmut Apaydın	Caucasian	2019	HBC	PCR–RFLP	31	17	52	32	26	76
	Selvihan Beysel	Caucasian	2019	HBC	PCR–RFLP	34	48	78	20	52	73
TaqI (rs731236)						CC	TT	CT	CC	TT	CT
	Golzar Rahmannezhad	Asian	2016	HBC	PCR–RFLP	16	78	63	17	55	85
	Mahmut Apaydın	Caucasian	2019	HBC	PCR–RFLP	14	44	42	14	54	66
	Selvihan Beysel	Caucasian	2019	HBC	PCR–RFLP	42	81	37	30	82	33
	Beibei Zhu	Asian	2019	PBC	iMLDR	8	237	29	21	341	18

PCR—RFLP, polymerase chain reaction—restriction fragment length polymorphism; iMLDR, improved multiple ligase detection reaction; HBC, hospital-based study; PBC, population-based study

ISSN: 1758-5996