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Table 1 Demography of the combined studies

From: The PstI/RsaI and DraI polymorphisms of CYP2E1and head and neck cancer risk: a meta-analysis based on 21 case-control studies

Author, year

Polymorphism

Ethnicity

Cases

Controls

Genotype distribution in controls

     

PstI/RsaI

DraI

     

c1c1

c1c2

c2c2

TT

TA

AA

Olivieri et al.,2009 [2]

PstI/RsaI

Brazilian

153

145

105

16

0

/

/

/

Ruwali et al.,2009 [3]

PstI/RsaI, DraI

Indian

350

350

343

7

0

253

94

3

Bouchardy et al.,2000 [7]

PstI/RsaI, DraI

French Caucasians

250

172

164

8

0

151

20

1

Lucas et al.,1996 [21]

PstI/RsaI, DraI

French Caucasians

96

460

248

11

1

368

86

6

Hildesheim et al.,1997 [22]

PstI/RsaI, DraI

Taiwanese

364

320

198

113

9

183

123

14

Hung et al.,1997 [23]

PstI/RsaI

Taiwanese

41

122

76

42

4

/

/

/

González et al.,1998 [24]

PstI/RsaI

Spaish

75

200

179

21

0

/

/

/

Matthia et al.,1998 [25]

PstI/RsaI, DraI

German Caucasians

398

219

165

10

0

102

17

2

Morita et al.,1999 [26]

PstI/RsaI

Japanese

145

164

105

52

7

/

/

/

Katoh et al.,1999 [27]

PstI/RsaI

Japanese

92

146

95

45

7

/

/

/

Kongruttanachok et al.,2001 [28]

PstI/RsaI

Thai

217

297

189

103

5

/

/

/

Liu et al., 2001 [29]

PstI/RsaI

American

174

399

384

15

0

/

/

/

Neuhaus et al.,2004 [30]

PstI/RsaI, DraI

German

312

299

282

13

2

196

39

1

Li et al.,2005 [31]

PstI/RsaI

White American

724

1226

1137

86

3

/

/

/

Gajecka et al.,2005 [32]

PstI/RsaI

Poland Caucasians

289

316

305

18

0

/

/

/

Sugimura et al.,2006 [33]

PstI/RsaI, DraI

Japanese

122

241

164

70

7

126

97

18

Gattáet al.,2006 [34]

PstI/RsaI

Brazilian

103

102

96

6

0

/

/

/

Marques et al.,2006 [35]

PstI/RsaI

Brazilian

231

212

187

25

0

/

/

/

Soya et al.,2008 [36]

PstI/RsaI, DraI

Indian

408

220

212

8

0

145

65

10

Shama et al., 2008 [37]

PstI/RsaI

White American

197

416

364

39

0

/

/

/

Boccia et al.,2008 [38]

PstI/RsaI, DraI

Italian

210

245

228

15

1

224

19

1