Table 1.
Contributing studies.
| Study | Abbreviation | Location | Main race/ethnicity | Study setting | Start date | Maximum waves, No. | Length of follow-up, median, y (IQR) | N1 | N2 |
|---|---|---|---|---|---|---|---|---|---|
| COSMIC studies | Primary analyses using the individual participant data analysis | ||||||||
| Bambui Cohort Study of Ageing43 | Bambui | Brazil | Brazilian | Community-based | 1997 | 16 | 11 (8) | 1387 | 1323 |
| Einstein Aging Study44 | EAS | USA | White, Black | Community-based | 1993 | 19 | 4 (5) | 2021 | 1325 |
| Etude Sante' Psychologique Pre'valence Risques et Traitement45 | ESPRIT | France | White | Community-based | 1999 | 5 | 10 (11) | 1920 | 1707 |
| The International Mobility In Aging Study46 | IMIAS | Albania, Canada, Brazil, and Colombia | No data | Community-based | 2012 | 2 | 4 (0) | 1907 | 1661 |
| Invecchiamento Cerebrale in Abbiategrasso47 | Invece.Ab | Italy | White | Community-based | 2010 | 4 | 8 (4) | 1126 | 998 |
| Monongahela Youghiogheny Healthy Aging Team48 | MYHAT | USA | White, Black | Community-based | 2006 | 15 | 6 (8) | 1585 | 948 |
| Sacramento Area Latino Study on Aging49 | SALSA | USA | White | Community-based | 1998 | 7 | 7.5 (4) | 1642 | 1401 |
| Singapore Longitudinal Ageing Studies (I)50 | SLASI | Singapore | Chinese | Community-based | 2003 | 3 | 3 (2) | 2702 | 2003 |
| Vallecas Project51 | Vallecas | Spain | White | Community-based | 2011 | 10 | 5.5 (4) | 1169 | 987 |
| Hellenic Longitudinal Investigation of Aging and Diet52 | HELIAD | Greece | White | Community-based | 2010 | 2 | 3 (1) | 1445 | 695 |
| Zaragoza Dementia Depression Project | ZARADEMP | Zaragoza, Spain | White | Community-based | 1994 | 4 | 5 (9) | 4399 | 2100 |
| Leipzig Longitudinal Study of the Aged | LEILA75+ | Leipzig, Germany | White | Community-based | 1997 | 7 | 5 (4) | 1038 | 811 |
| Ibadan Study of Ageing | Ibadan | Ibadan, Nigeria | Black, African | Community-based | 2003 | 7 | 5 (5.5) | 4193 | 3633 |
| The Indianapolis Ibadan Dementia Project | IIDPIN | Ibadan, Nigeria and Indianapolis, USA | Black, African | Community-based | 1992 | 7 | 5 (5) | 3848 | 3013 |
| External validation studies | Generalization to different healthcare settings | ||||||||
| The Singapore Epidemiology of Eye Diseases study53 | Community-based | Singapore | Chinese, Malay, Indian |
Community-based | 2010 | NA | NA | 911 | NA |
| Singapore memory clinic study54 | Memory clinic | Singapore | Chinese, Malay, Indian |
Clinic-based | 2010 | 5 | 4 (3) | 422 | 356 |
| The COgnition After STroke (COAST) cohort55 | Post-stroke | Singapore | Chinese, Malay, Indian |
Clinic-based | 2010 | 4 | 5 (5) | 318 | 221 |
Note. N1: Sample size for cross-sectional analyses. N2: Sample size for longitudinal and stratification analyses.