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Table 1 The primary characteristics of the 28 studies

From: Meta-analysis of association between TCF7L2 polymorphism rs7903146 and type 2 diabetes mellitus

    

T2DM

Control

 

Study

Year

Population

Ethnicity

CC

CT

TT

CC

CT

TT

HWE

Ezzidi et al.

2009

Arabic Tunisian

Arab

250

396

217

181

235

95

0.227155

Saadi et al.

2008

Arab

Arab

30

54

11

71

94

23

0.388992

Humphries et al.

2006

Afro-Caribbean

Black African

141

136

30

161

124

26

0.75859

Yu et al.

2009

African American

Black African

255

212

48

1156

921

165

0.31807

Danquah et al.

2013

Ghanaian

Black African

273

323

78

182

165

28

0.257132

Yu et al.

2009

USA Caucasian

Caucasian

430

392

101

4295

3391

693

0.515248

Groves et al.

2006

English

Caucasian

771

960

270

1175

1084

217

0.944175

Humphries et al.

2006

European

Caucasian

601

665

193

1295

1001

197

0.854011

Cauchi et al.

2006

Austrian

Caucasian

200

208

78

555

432

88

0.759981

Dahlgren et al.

2007

Swedish

Caucasian

67

83

18

496

327

62

0.421344

Mayans et al.

2007

Swedish

Caucasian

452

318

54

532

253

35

0.480907

Van et al.

2007

Dutch

Caucasian

203

221

72

459

365

83

0.396927

Kimber et al.

2007

English

Caucasian

1405

1459

361

1714

1329

248

0.662991

De Silva et al.

2007

English

Caucasian

420

507

161

1032

887

180

0.58617

Vcelak et al.

2012

Czech

Caucasian

148

156

43

205

147

24

0.730572

Hayashi et al.

2007

Japanese

East Asian

1450

165

4

980

85

2

0.91209

Horikoshi et al.

2007

Japanese

East Asian

165

22

2

251

21

0

0.507848

Kazuaki et al.

2008

Japanese

East Asian

1921

228

5

1696

137

1

0.29539

Yasuharu et al.

2009

Japanese

East Asian

434

45

2

372

26

0

0.50056

Zheng et al.

2011

Chinese

East Asian

202

24

1

139

13

0

0.581813

Marquezine et al.

2007

Brazilian

Brazilian

45

54

13

564

603

128

0.070107

Barra et al.

2013

Brazilian

Brazilian

55

49

6

58

40

11

0.304112

Assmann et al.

2014

Brazilian

Brazilian

382

415

156

261

215

59

0.147418

Bodhini et al.

2007

Asian Indian

South Asian

462

455

114

555

391

92

0.531352

Chandak et al.

2007

Indian

South Asian

391

423

141

205

160

34

0.726021

Rees et al.

2008

UK South Asian

South Asian

352

360

116

222

166

44

0.12238

Gupta et al.

2010

Indian

South Asian

55

96

44

62

78

21

0.64658

Hussain et al.

2014

Indian

South Asian

25

36

7

43

35

4

0.349985

  1. A total of 56628 participants (34,232 cases and 22,396 controls) of 28 studies from 26 articles were included in the study. The name of the first author, the publication year of, the population of the study, the ethnicity of the study, the genotypes of the case -control group and the P value of HWE. If the p value of HWE in control group met the selection criteria (P > 0.05), it would be preserved, otherwise the data would be removed