Table 1.
Country, study sites, number of participants from each country, mean age (with SD), and sex ratio.
| Country | Study sites | Participants | Mean age (SD) | Sex ratio (% males) |
|---|---|---|---|---|
| Africa | 895 | 25.69 (SD = 6.56) | 462 (52%) | |
| Algeria | Algiers; Setif | 431 | 26.33 (SD = 6.73) | 197 (45%) |
| Nigeria | Nsukka | 272 | 25.31 (SD = 5.82) | 143 (53%) |
| Uganda | Gulu; Gampala | 192 | 24.80 (SD = 7.01) | 122 (64%) |
| Asia | 2,362 | 26.24 (SD = 8.26) | 1,015 (43%) | |
| China | Beijing | 192 | 26.12 (SD = 9.02) | 93 (48%) |
| India | Delhi | 304 | 25.41 (SD = 8.88) | 162 (53%) |
| Indonesia | Jakarta; Yogyakarta | 68 | 20.05 (SD = 2.27) | 26 (38%) |
| Iran | Shiraz | 112 | 25.80 (SD = 6.71) | 52 (46%) |
| Jordan | Ma'an | 166 | 21.56 (SD = 4.26) | 92 (55%) |
| Malaysia | Sintok; Kuala Lumpur | 179 | 29.62 (SD = 10.38) | 80 (44%) |
| Pakistan | Iahore; Islamabad; Karachi | 606 | 26.75 (SD = 8.42) | 245 (40%) |
| Russia | Moscow; Ussuriisk | 104 | 27.41 (SD = 8.91) | 39 (37%) |
| South Korea | Seoul | 141 | 26.35 (SD = 9.57) | 79 (56%) |
| Vietnam | Hanoi | 489 | 27.20 (SD = 6.47) | 146 (29%) |
| Australia | Canberra | 425 | 27.58 (SD = 9.02) | 202 (48%) |
| Europe | 6,281 | 27.02 (SD = 9.32) | 2,826 (45%) | |
| Austria | Vienna | 160 | 23.46 (SD = 6.15) | 37 (23%) |
| Belgium | Louvain la Neuve | 372 | 28.68 (SD = 8.80) | 167 (44%) |
| Bulgaria | Blagoevgrad; Sofia | 113 | 23.89 (SD = 7.87) | 41 (36%) |
| Croatia | Zagreb | 299 | 24.63 (SD = 9.37) | 135 (45%) |
| Estonia | Tartu | 182 | 26.04 (SD = 7.89) | 83 (45%) |
| Georgia | Tbilisi | 189 | 27.66 (SD = 10.88) | 93 (49%) |
| Germany | Dresden | 79 | 26.76 (SD = 6.99) | 26 (26%) |
| Greece | Crete; Athens | 115 | 29.68 (SD = 11.25) | 43 (37%) |
| Hungary | Budapest; Pecs; Várpalota; Székesfehérvár; Zalaegerszeg | 779 | 28.66 (SD = 10.26) | 379 (48%) |
| Italy | Milan | 325 | 27.42 (SD = 10.55) | 104 (32%) |
| Lithuania | Vilnius | 259 | 26.53 (SD = 8.63) | 128 (49%) |
| Netherlands | Amsterdam | 177 | 28.92 (SD = 11.44) | 65 (36%) |
| Norway | Trondheim | 267 | 23.20 (SD = 2.82) | 143 (53%) |
| Poland | Brzeg; Gdansk; Wrocław | 448 | 25.68 (SD = 7.25) | 252 (56%) |
| Portugal | Lisbon | 246 | 26.52 (SD = 9.11) | 97 (39%) |
| Romania | Bucharest | 170 | 25.99 (SD = 8.97) | 84 (49%) |
| Slovakia | Trnava; Nitra | 126 | 26.95 (SD = 7.54) | 51 (40%) |
| Slovenia | Ljubljana; Maribor | 490 | 27.00 (SD = 8.71) | 236 (48%) |
| Spain | Granada | 182 | 23.53 (SD = 4.24) | 58 (31%) |
| Sweden | Stockholm | 277 | 28.29 (SD = 10.37) | 133 (48%) |
| Turkey | Istanbul; Izmir | 813 | 28.97 (SD = 10.71) | 369 (45%) |
| Ukraine | Lviv | 214 | 26.14 (SD = 8.46) | 103 (48%) |
| Latin America | 1,602 | 27.55 (SD = 10.67) | 672 (43%) | |
| Brazil | Rio de Janeiro; São Paulo | 279 | 28.77 (SD = 11.57) | 126 (45%) |
| Chile | Santiago | 176 | 31.17 (SD = 13.14) | 72 (40%) |
| Colombia | Bogotá; Cucuta; Tunja | 170 | 27.82 (SD = 11.67) | 78 (45%) |
| Costa Rica | San José | 121 | 37.61 (SD = 8.01) | 61 (50%) |
| Cuba | Havana; Vereda Nueva; Consolación del Sur | 123 | 24.59 (SD = 8.26) | 49 (39%) |
| El Salvador | San Salvador | 86 | 24.10 (SD = 7.46) | 31 (36%) |
| Mexico | Mexico city | 163 | 25.50 (SD = 7.71) | 67 (32%) |
| Peru | Lima | 249 | 21.88 (SD = 6.40) | 92 (36%) |
| Uruguay | Montevideo | 235 | 28.39 (SD = 10.10) | 96 (40%) |
| North America | 200 | 20.75 (SD = 4.35) | 74 (37%) | |
| United States | Austin | 200 | 20.75 (SD = 4.35) | 74 (37%) |
| In total | 11,765 | 26.75 (SD = 9.10) | 5,251 (45%) |
Bolded items represent sums for each continent and for the entire dataset.