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Table 3 Characteristics of studies on VDR TaqI rs731236 (T/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

CT

TT

CC

CT

TT

Dasgupta [14]

2015

India

Asian

7

252

401

47

92

113

105

110

186

Jedrzejuk [15]

2015

Poland

Caucasian

7

90

98

8

45

37

12

37

49

Mahmoudi [16]

2015

Iran

Asian

8

35

35

6

14

15

4

16

15

Mahmoudi [17]

2009

Iran

Asian

8

162

162

20

71

71

14

76

72

El-Shal [18]

2013

Egypt

Caucasian

8

150

150

36

74

40

20

61

69

Siddamalla [19]

2017

India

Asian

7

95

130

24

31

40

17

42

71

Bagheri [24]

2013

Iran

Asian

7

38

38

8

14

16

2

19

17

Wehr [20]

2011

Australia

Caucasian

7

536

137

72

238

226

23

65

49

Cao [21]

2016

China

Asian

7

120

120

11

52

57

8

72

40

Santos [22]

2018

Brazil

Caucasian

7

188

99

70

87

31

40

48

11