First author, year [reference] | Country | Study design | Cases, n | Â | Controls, n | Â |
---|---|---|---|---|---|---|
 |  |  | 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 | Â | Â | 2,902 | 3,191 | 6,350 | 29,623 |