Table 2

Top 20 most studied countries in the dataset

RankCountry# of articlesIncome group
1Australia382HIC
2UK348HIC
3USA245HIC
4Canada103HIC
5Sweden63HIC
6Russian Federation59UMIC
7South Africa59UMIC
8New Zealand57HIC
9Brazil53UMIC
10China53UMIC
11Finland51HIC
12India49LMIC
13Spain42HIC
14Thailand40UMIC
15Netherlands33HIC
16Germany31HIC
17Ireland30HIC
18Norway30HIC
19Denmark28HIC
20Italy21HIC
  • 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.