Table 1.
Most important characteristics of the included studies.
| Category | Details | N (%)* |
|---|---|---|
| Year of publication | ||
| 2015 | 37 (13.1) | |
| 2016 | 42 (14.8) | |
| 2017 | 23 (8.1) | |
| 2018 | 47 (16.6) | |
| 2019 | 17 (6.0) | |
| 2020 | 28 (9.9) | |
| 2021 | 67 (23.7) | |
| 2022 | 22 (7.7) | |
| Country | ||
| United States of America | 39 (13.3) | |
| The Netherlands | 30 (10.2) | |
| Australia | 28 (9.6) | |
| China | 24 (8.2) | |
| United Kingdom | 16 (5.5) | |
| Korea | 14 (4.8) | |
| Spain | 13 (4.4) | |
| Denmark | 11 (3.8) | |
| Sweden | 11 (3.8) | |
| Canada | 10 (3.4) | |
| Italy | 10 (3.4) | |
| Taiwan | 10 (3.4) | |
| Germany | 8 (2.7) | |
| Japan | 8 (2.7) | |
| Norway | 8 (2.7) | |
| Belgium | 6 (2.1) | |
| Turkey | 5 (1.7) | |
| Others** | 34 (15.4) | |
| Total countries | 293 (100) | |
| Study design | ||
| Intervention study | 230 (81.3) | |
| Observational study | 36 (12.7) | |
| Descriptive study | 17 (6.0) | |
| Age related inclusion criteria | ||
| Not reported | 97 (34.3) | |
| Older than 65 | 62 (21.9) | |
| Older than 18 | 38 (13.4) | |
| Another criterion*** | 26 (9.2) | |
| Older than 60 | 23 (8.1) | |
| Older than 75 | 8 (2.8) | |
| Older than 70 | 7 (2.5) | |
| Older than 50 | 5 (1.7) | |
| Ceiling age at 85 | 6 (2.1) | |
| Ceiling age at 80 | 5 (1.7) | |
| Ceiling age at 70 | 3 (1.1) | |
| Ceiling age at 75 | 2(0.7) | |
| Ceiling age at 90 | 1(0.4) |
Represents the proportion of included studies.
Finland, New Zealand, Portugal Chile, France, Mexico, Brazil, Greece, Iran, Singapore, Austria, Bangladesh, Croatia, Cyprus, India, Ireland, Israel, Malaysia, Nepal, Philippines, Poland, Switzerland, Uganda.
Refers to infrequent criteria like “between 40 and 67 years" (48) or population-specific criteria. For example, “older 50 or 55 years” for Aboriginal and Torres Strait Islander people (49, 50) or “older than 60 years” in the Netherlands but “older than 80 years” in Switzerland (51); or comorbidities-adjusted age inclusion related criteria like “older than 65 years” in general but between 50 and 64 for people with a chronic health condition (52).