Top 20 most studied countries in the dataset
| Rank | Country | # of articles | Income group |
| 1 | Australia | 382 | HIC |
| 2 | UK | 348 | HIC |
| 3 | USA | 245 | HIC |
| 4 | Canada | 103 | HIC |
| 5 | Sweden | 63 | HIC |
| 6 | Russian Federation | 59 | UMIC |
| 7 | South Africa | 59 | UMIC |
| 8 | New Zealand | 57 | HIC |
| 9 | Brazil | 53 | UMIC |
| 10 | China | 53 | UMIC |
| 11 | Finland | 51 | HIC |
| 12 | India | 49 | LMIC |
| 13 | Spain | 42 | HIC |
| 14 | Thailand | 40 | UMIC |
| 15 | Netherlands | 33 | HIC |
| 16 | Germany | 31 | HIC |
| 17 | Ireland | 30 | HIC |
| 18 | Norway | 30 | HIC |
| 19 | Denmark | 28 | HIC |
| 20 | Italy | 21 | HIC |
Note: Country of study available or applicable for 2172 articles in the dataset (2172/4553, 47.7%).
HIC, high-income country; LMIC, low-middle-income country; UMIC, upper-middle-income country.