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Table 1 Characteristics of studies on VDR ApaI rs7975232 (A > C) 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

CC

AC

AA

CC

AC

AA

Dasgupta [14]

2015

India

Asian

7

250

250

13

120

117

13

117

120

Jedrzejuk [15]

2015

Poland

Caucasian

7

90

98

19

52

19

17

49

32

Mahmoudi [16]

2015

Iran

Asian

8

35

35

9

11

15

6

21

8

Mahmoudi [17]

2009

Iran

Asian

8

162

162

36

68

58

23

90

49

El-Shal [18]

2013

Egypt

Caucasian

8

150

150

22

65

63

18

64

68

Siddamalla [19]

2017

India

Asian

7

95

130

32

21

42

25

35

70

Wehr [20]

2011

Australia

Caucasian

7

543

145

127

274

142

37

60

48

Cao [21]

2016

China

Asian

7

120

120

40

58

22

26

55

39

Santos [22]

2018

Brazil

Caucasian

7

190

100

41

88

61

16

48

36