| 1 | 🇺🇸 United States | 136 | 89 | 49.6% | Ferrucci, Luigi G. #377 | University of Michigan, Ann Arbor |
| 2 | 🇬🇧 United Kingdom | 35 | 20 | 12.8% | Kirkwood, Thomas Bl L. #7,845 | King's College London |
| 3 | 🇨🇦 Canada | 17 | 11 | 6.2% | Fülöp, Tamas #27,302 | University of Toronto |
| 4 | 🇩🇪 Germany | 10 | 4 | 3.6% | Bauer, Jürgen M. #22,378 | Universität Heidelberg |
| 5 | 🇦🇺 Australia | 9 | 6 | 3.3% | Currow, David Christopher #32,539 | Flinders University |
| 6 | 🇳🇱 Netherlands | 8 | 8 | 2.9% | De Jong Gierveld, Jenny #10,365 | Vrije Universiteit Amsterdam |
| 7 | 🇯🇵 Japan | 8 | 2 | 2.9% | Umegaki, Hiroyuki #59,262 | National Center for Geriatrics and Gerontology |
| 8 | 🇮🇹 Italy | 7 | 5 | 2.6% | Franceschi, Claudio #1,875 | Università Cattolica del Sacro Cuore, Campus di Roma |
| 9 | 🇳🇿 New Zealand | 5 | 5 | 1.8% | Wiles, Janine L. #34,800 | University of Auckland |
| 10 | 🇭🇰 Hong Kong | 5 | 4 | 1.8% | Fung, Helene Hoi Lam #44,792 | Chinese University of Hong Kong |
| 11 | 🇧🇪 Belgium | 5 | 1 | 1.8% | Bautmans, Ivan #67,153 | Vrije Universiteit Brussel |
| 12 | 🇮🇱 Israel | 4 | 3 | 1.5% | Ayalon, Liat #7,162 | Bar-Ilan University |
| 13 | 🇫🇮 Finland | 4 | 2 | 1.5% | Jylhá, Marja K. #24,102 | Tampere University |
| 14 | 🇸🇬 Singapore | 4 | 1 | 1.5% | Ng, Reuben #70,049 | Duke-NUS Medical School |
| 15 | 🇨🇳 China | 3 | 2 | 1.1% | Wu, Bei #16,017 | NYU Shanghai |
| 16 | 🇨🇭 Switzerland | 2 | 1 | 0.7% | Seifert, Alexander #38,012 | Fachhochschule Nordwestschweiz FHNW |
| 17 | 🇪🇸 Spain | 2 | 1 | 0.7% | de la Fuente, Mónica T. #93,742 | Universidad Complutense de Madrid |
| 18 | 🇵🇹 Portugal | 2 | 0 | 0.7% | Gomes, Barbara #122,753 | Universidade de Coimbra, Faculdade de Medicina |
| 19 | 🇺🇦 Ukraine | 1 | 1 | 0.4% | Vaiserman, Alexander #25,602 | Institute of Gerontology Academy of Medical Sciences of Ukraine |
| 20 | 🇷🇺 Russia | 1 | 1 | 0.4% | Moskalev, Alexey Alexandrovich #52,753 | Petrovsky National Research Centre of Surgery |
| 21 | 🇫🇷 France | 1 | 1 | 0.4% | Robine, Jean Marie #55,967 | École Pratique des Hautes Études |
| 22 | 🇹🇼 Taiwan | 1 | 1 | 0.4% | Hsu, Hui Chuan #64,214 | Taipei Medical University |
| 23 | 🇨🇿 Czechia | 1 | 1 | 0.4% | Lee, Sunwoo #83,808 | Palacký University Olomouc |
| 24 | 🇸🇪 Sweden | 1 | 0 | 0.4% | Jylhävä, Juulia #121,171 | Karolinska Institutet |
| 25 | 🇰🇷 South Korea | 1 | 0 | 0.4% | Jang, Yuri #130,427 | Ewha Womans University |
| 26 | 🇱🇺 Luxembourg | 1 | 0 | 0.4% | Kornadt, Anna E. #165,268 | University of Luxembourg |