Table 2.
Summary of the largest 16 clusters of CNA research.
| Cluster ID | Size | Silhouette | Label (LLR) | Year |
|---|---|---|---|---|
| 0 | 107 | 0.862 | age-related difference | 2013 |
| 1 | 99 | 0.853 | cognitive aging | 2015 |
| 2 | 87 | 0.84 | aging brain | 2010 |
| 3 | 76 | 0.933 | cognitive correlate | 2006 |
| 4 | 63 | 0.902 | working memory network | 2019 |
| 5 | 59 | 0.857 | joint association | 2018 |
| 6 | 55 | 0.932 | modifiable life factor | 2020 |
| 7 | 46 | 0.959 | cognitive aging neuromodulation | 2003 |
| 8 | 35 | 0.954 | ketogenic diet | 2018 |
| 9 | 33 | 0.926 | posterior–anterior shift | 2008 |
| 10 | 33 | 0.982 | characterizing cognitive aging | 2011 |
| 11 | 33 | 0.971 | frontal aging hypothesis | 2000 |
| 12 | 24 | 0.936 | age-related memory decline dysfunction | 2019 |
| 13 | 21 | 0.991 | ovariectomized rhesus money | 2004 |
| 14 | 21 | 0.93 | late-life women | 2012 |
| 17 | 15 | 0.92 | life study | 2016 |