Table 1. Data extraction table.
| Year | Country | First author | Confirmed | Suspected | Sample size | Study type | Study population |
|---|---|---|---|---|---|---|---|
| 1979 | Barbados | Damude | 45 | 115 | 561 | cross sectional | patient |
| 1983 | USA | Demers | 50 | - | 237 | cross sectional | general |
| 1985 | Trinidad | Everard | 328 | 654 | 1375 | cross sectional | general |
| 1985 | UK | Gill | 4 | 257 | 257 | cross sectional | general |
| 1985 | USA | Demers | 21 | 32 | 285 | cross sectional | general |
| 1986 | Ghana | Hogerzeil | 153 | 460 | 460 | cross sectional | general |
| 1987 | Italy | Cacciapuoti | 48 | - | 660 | cross sectional | patient |
| 1987 | Singapore | Chan | 40 | 300 | 300 | case-control | general |
| 1989 | Trinidad | Everard | 53 | 558 | 1000 | longitudinal | general |
| 1991 | Nigeria | Ezeh | 128 | 710 | 710 | cross sectional | general |
| 1992 | Brazil | Vasconcelos | 59 | 208 | 208 | cross sectional | general |
| 1992 | USA | Childs | 31 | - | 1150 | cross sectional | general |
| 1994 | Italy | Cacciapuoti | 305 | - | 2534 | cross sectional | patient |
| 1995 | Barbados | Everard | 398 | 816 | 816 | cross-sectional | patient |
| 1995 | Canada | DeSerres | 9 | 76 | 76 | cross sectional | general |
| 1996 | Martinique | Lhomme | 48 | 518 | 518 | cross sectional | patient |
| 1997 | Barbados | Doughlin | 22 | - | 60 | case-control | general |
| 1998 | India | Murhekar | 550 | 1014 | 1014 | case-control | general |
| 1998 | Nicaragua | Trevejo | 61 | 2259 | 2259 | case-control | patient |
| 1999 | Brazil | Almeida | 34 | 149 | 386 | case-control | general |
| 1999 | Seychelles | Bovet | 75 | 125 | 250 | case-control | general |
| 2000 | Guadalupe | Nardone | 64 | 124 | 124 | case-control | patient |
| 2000 | Nicaragua | Ashford | 84 | 566 | 566 | cross sectional | general |
| 2000 | Thailand | Tangkanakakul | 59 | 80 | 177 | case-control | patient |
| 2001 | Brazil | Barcellos | 87 | - | 87 | other | general |
| 2002 | Brazil | Sarkar | 66 | 157 | 226 | case-control | patient |
| 2002 | India | Natarajaseenivasa | 225 | 329 | 329 | cross sectional | general |
| 2002 | Mexico | Vado-Solis | 57 | 400 | 400 | cross sectional | general |
| 2002 | Peru | Cruz | 115 | 457 | 457 | cross sectional | general |
| 2002 | Thailand | Phraisuwan | 43 | 104 | 104 | case-control | general |
| 2002 | USA | Morgan | 64 | 389 | 834 | cross sectional | general |
| 2003 | El Salvador | Silva | 39 | 73 | 73 | cross sectional | general |
| 2003 | India | Karande | 18 | 53 | 53 | cross sectional | patient |
| 2003 | Ireland | Boland | 6 | 62 | 62 | cross sectional | general |
| 2003 | Mexico | Leal-Castellanos | 441 | 1169 | 1169 | cross sectional | general |
| 2003 | Peru | Cespedes | 26 | 71 | 71 | cross sectional | patient |
| 2004 | Reunion | Rachou | 36 | 78 | 78 | case-control | general |
| 2004 | India | Vijayachari | 352 | 1253 | 1544 | cross sectional | general |
| 2004 | India | Manocha | 25 | 346 | 346 | cross sectional | general |
| 2004 | Malaysia | Koay | 30 | 46 | 46 | case-control | general |
| 2004 | Poland | Krawczyk | 14 | 457 | 457 | cross sectional | general |
| 2005 | Colombia | Najera | 26 | 334 | 334 | cross sectional | general |
| 2005 | Guadalupe | Herrmann-Storck | 212 | 897 | 897 | cross sectional | patient |
| 2005 | Puerto Rico | Bruce | 42 | 730 | 730 | case-control | patient |
| 2006 | Brazil | Goncalves | 6 | 150 | 150 | cross sectional | general |
| 2006 | Brazil | Aguiar | 28 | 276 | 276 | cross sectional | general |
| 2006 | India | Sharma | 322 | 611 | 611 | other | general |
| 2007 | Guadalupe | Storck | 165 | 488 | 488 | cross sectional | patient |
| 2007 | F.Polynesia | Coudert | 33 | 113 | 113 | cross sectional | patient |
| 2008 | Argentina | Vanasco | 182 | 812 | 812 | case-control | general |
| 2008 | Colombia | Diaz | 52 | 273 | 273 | cross sectional | general |
| 2008 | Laos | Kawaguchi | 97 | - | 406 | cross sectional | general |
| 2008 | India | Bhardwaj | 62 | 129 | 129 | case-control | general |
| 2009 | Colombia | Padmanabha | 228 | 642 | 642 | cross sectional | general |
| 2009 | India | Sugunan | 52 | 114 | 52 | case-control | patient |
| 2010 | Jamaica | Keenan | 43 | 77 | 77 | case-control | patient |
| 2012 | Canada | Sampassa-Kanyinga | 60 | 264 | 264 | cross sectional | general |
| 2012 | Thailand | Chusri | 150 | 11 | 150 | cross sectional | general |
| 2013 | Malaysia | Rafizah | 84 | 999 | 999 | cross sectional | patient |
| 2013 | Kenya | Awosanya | 15 | 15 | 30 | case-control | general |
| 2014 | Brazil | Felzemburgh | 51 | 1585 | 1585 | cohort | general |
| 2014 | Micronesia | Colt | 11 | 54 | 54 | cross sectional | patient |
| 2014 | New Zealand | Dreyfus | 62 | 567 | 567 | cross sectional | general |
| 2015 | Sri Lanka | Agampodi | 112 | 401 | 112 | case-control | patient |
Complete references for these studies are presented in S1 Text