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Table 1 Characteristics of studies, numbers of women with invasive cervical cancer (cases) or normal cytology (controls)

From: Comparing human papillomavirus prevalences in women with normal cytology or invasive cervical cancer to rank genotypes according to their oncogenic potential: a meta-analysis of observational studies

First author, year [reference]

Country

Study design

Cases, n

 

Controls, n

 
   

HPV+

Total

HPV+

Total

Abba, 2003 [30]

Argentina

Cross-sectional

21

21

70

152

Alibegashvili, 2011 [31]

Georgia

Case–control

91

91

143

1,247

An, 2003 [32]

South Korea

Cross-sectional

48

50

72

276

Andersson, 2005 [33]

Sweden

Cross-sectional

45

45

24

24

Asato, 2004 [34]

Japan

Case–control

311

356

333

3,249

Baay, 2001 [35]

Belgium

Case–control

101

115

31

286

Bardin, 2008 [36]

Poland

Case–control

87

88

115

799

Castellsagué, 2008 [37]

Mozambique

Case–control

230

241

148

195

Chang, 1997 [38]

China

Case–control

39

47

42

72

Chaouki, 1998 [39]

Morocco

Case–control

144

152

38

185

Cho, 2003 [40]

South Korea

Cross-sectional

43

49

132

414

Ferrera, 1999 [41]

Honduras

Case–control

83

104

170

438

Hammouda, 2011 [42]

Algeria

Case–control

167

171

39

732

Herrero, 2005 [43]

Costa-Rica

Cross-sectional

34

35

1,671

7,459

Hong, 2008 [44]

China

Case–control

172

181

91

217

Illades-Aguiar, 2009 [45]

Mexico

Case–control

133

133

91

256

Illades-Aguiar, 2010 [46]

Mexico

Cross-sectional

141

141

1,274

3,117

Keita, 2009 [47]

Guinea

Case–control

70

77

360

752

Lee, 2007 [48]

South Korea

Cross-sectional

133

160

388

1,650

Liu, 2010 [49]

China

Case–control

111

134

274

613

Maehama, 2005 [50]

Japan

Case–control

330

383

434

4,078

Park, 2004 [51]

South Korea

Cross-sectional

59

62

51

290

Sasagawa, 2001 [52]

Japan

Case–control

75

84

151

1,562

Sherpa, 2010 [53]

Nepal

Case–control

54

61

73

898

Tachezy, 1999 [54]

Czech Republic

Cross-sectional

36

49

38

165

Tornesello, 2006 [55]

Italy

Case–control

53

65

36

183

Wu, 2010 [56]

China

Cross-sectional

91

96

61

314

Total

  

2,902

3,191

6,350

29,623

  1. HPV+, human papillomavirus-positive.