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Table 2 Number of collagen IX Trp2/3 carriers and non-carriers of the studies included in the meta-analysis

From: Association between polymorphisms of collagen genes and susceptibility to intervertebral disc degeneration: a meta-analysis

Polymorphism

Ethnicity

Case group

Control group

Carriers

Non-carriers

Carriers

Non-carriers

COL9A2 Trp2, rs137853213

     

Annunen [18]

Caucasian

6

151

0

174

Noponen-Hietala [46]

Caucasian

1

28

0

56

Kales [44]

Caucasian

0

105

0

102

Matsui [17]

Mixed

4

93

0

10

Jim [41]

Asian

108

406

52

238

Solovieva [42]

Caucasian

3

77

0

55

Seki [40]

Asian

100

370

150

504

Song [38]

Asian

30

95

25

100

Hyun [37]

Asian

50

155

23

76

Zhu [36]

Mixed

1

24

0

7

Kelempisioti [35]

Caucasian

6

144

8

238

Lim [45]

Asian

4

30

3

17

Rathod [32]

Asian

57

43

17

83

Bagheri [25]

Asian

34

74

13

44

Hanaei [23]

Asian

37

56

41

53

COL9A3 Trp3, rs61734651

     

Paassilta [19]

Caucasian

40

131

30

291

Noponen-Hietala [46]

Caucasian

4

26

0

56

Kales [44]

Caucasian

9

96

5

97

Matsui [17]

Mixed

7

90

0

10

Jim [41]

Asian

0

514

0

290

Solovieva [42]

Caucasian

15

62

8

47

Zhu [36]

Mixed

5

20

1

6

Eskola [39]

Caucasian

9

57

31

123

Kelempisioti [35]

Caucasian

22

128

52

194

Lim [45]

Asian

0

34

0

20

Omair [33]

Caucasian

17

129

23

165

Rathod [32]

Asian

5

95

7

93

Bagheri [25]

Asian

29

79

10

47