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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.