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Table 2 Characteristics of studies on VDR BsmI rs1544410 (A > G) variant and polycystic ovarian syndrome (PCOS) susceptibility

From: Association of vitamin D receptor gene variants with polycystic ovary syndrome: a meta-analysis

Author

Year

Country

Ethnicity

NOS scores

Sample size

Genotype in cases

Genotype in controls

PCOS

Control

GG

AG

AA

GG

AG

AA

Jedrzejuk [15]

2015

Poland

Caucasian

7

90

98

31

45

14

43

42

13

Mahmoudi [16]

2015

Iran

Asian

8

35

35

13

12

10

7

23

5

Mahmoudi [17]

2009

Iran

Asian

8

162

162

53

85

24

53

91

18

Bagheri [23]

2012

Iran

Asian

7

46

46

4

27

15

2

24

20

Siddamalla [19]

2017

India

Asian

7

94

130

34

45

15

17

41

72

Wehr [20]

2011

Australia

Caucasian

7

537

137

77

244

216

49

66

22

Cao [21]

2016

China

Asian

7

120

120

37

60

23

25

55

40

Santos [22]

2018

Brazil

Caucasian

7

187

100

74

76

37

41

48

11