Table 1. Epidemiologic characteristics in seven geo-economic regions.
| Characteristic | SSA | SSEA | Latin America/Caribbean | Europe | North America | Upper-Income Asia | FSU |
|---|---|---|---|---|---|---|---|
| Number of studies | 95 | 56 | 38 | 42 | 27 | 12 | 12 |
| Number of individuals | 11,536 | 6,522 | 5,628 | 11,802 | 9,283 | 4,950 | 1,365 |
| Median number individuals per study (IQR) | 72 (39–122) | 76 (46–123) | 82 (50–119) | 122 (66–213) | 274 (66–675) | 339 (68–504) | 101 (46–153) |
| Number of countries | 32 | 7 | 20 | 30 | 4 | 5 | 9 |
| Most common countries (number of studies) | ZA (19),UG (13),CM (13) | CN (22),VN (12),IN (11) | BR (24),AR (3),MX (3) | ES (12),IT (7),SE (5) | US (21),CA (9),PR (2) | KR (5),JP (4),TW (2) | EE (3),RU (3),UA (2) |
| Median sample year (IQR) | 2007(2004–2008) | 2008(2007–2009) | 2007(2002–2008) | 2005(2003–2006) | 2003(1999–2006) | 2005(2004–2007) | 2003(2002–2008) |
| Most common recruitment sites (number of studies) | VCT/ANC/BD/STD/TB (52);HIVC (29) | VCT/ANC/BD (14);HIVC (20) | HIVC (23);VCT/BD (9) | HIVC | HIVC (14);BD (5);VCT (1) | HIVC (8) | VCT/HIVC |
| Most common virus subtypes (percent individuals) | C (42%),A (17%),02 (17%) | 01 (66%),C (15%),B (13%) | B (83%),C (9%) | B (67%),C (7%),G (7%) | B (97%) | B (84%),01 (10%) | A (57%),06 (29%),B (9%) |
Latin America/Caribbean includes three studies from Caribbean countries. Three studies from North Africa and two studies from Australia are not included in this table but are summarized in S1 Table. Country abbreviations: AR, Argentina; BR, Brazil; CA, Canada; CM, Cameroon; CN, China; EE, Estonia; ES, Spain; IN, India; IT, Italy; JP, Japan; KR, Republic of Korea; MX, Mexico; PR, Puerto Rico; RU, Russia; SE, Sweden; TW, Taiwan; UA, Ukraine; UG, Uganda; VN, Viet Nam; ZA, South Africa. Recruitment site abbreviations: ANC, antenatal clinics; BD, blood donation centers; HIVC, HIV clinics; STD, sexually transmitted disease clinics; TB, tuberculosis clinics; VCT, voluntary counseling and testing centers.