Table 2.
Geographical origin for population of included studies
| Location | Study Number | % of Total (N = 90) |
|---|---|---|
| Single‐country studies | 85 | 94 |
| North America | 46 | 51 |
| USA | 34 | 38 |
| Canada | 10 | 11 |
| Dominican Republic | 2 | 2.2 |
| Europe | 26 | 29 |
| Netherlands | 6 | 6.7 |
| UK | 5 | 5.6 |
| Spain | 4 | 4.4 |
| Sweden | 4 | 4.4 |
| Belgium | 2 | 2.2 |
| Germany | 2 | 2.2 |
| Switzerland | 2 | 2.2 |
| France | 1 | 1.1 |
| Asia | 10 | 11 |
| Japan | 4 | 4.4 |
| South Korea | 2 | 2.2 |
| India | 1 | 1.1 |
| Iran | 1 | 1.1 |
| Israel | 1 | 1.1 |
| Turkey | 1 | 1.1 |
| Australia | 3 | 3.3 |
| Australia | 3 | 3.3 |
| Multiple‐Country Studies | 5 | 5.6 |
| EUROHIPa | 2 | 2.2 |
| 89 Country Studyb | 1 | 1.1 |
| USA, Canada | 1 | 1.1 |
| USA, UK, Australia | 1 | 1.1 |
aEUROHIP Cohort: Austria, Switzerland, Germany, Hungary, Poland, Spain, Italy, France, Sweden, Iceland, Finland, UK. bStudy included countries from six continents: North America, South America, Europe, Asia, Africa, Australia.