Table 4.
Major clusters of co-cited references.
| Cluster ID | Size | Silhouette | Mean (year) | Label (LLR) |
|---|---|---|---|---|
| 0 | 257 | 0.971 | 2016 | Perioperative neurocognitive disorder |
| 1 | 195 | 0.961 | 2000 | Off-pump coronary artery bypass |
| 2 | 148 | 0.99 | 2014 | Remote ischemic preconditioning |
| 3 | 136 | 0.916 | 2006 | Coronary artery bypass graft surgery |
| 4 | 114 | 0.923 | 2011 | Postoperative cognitive dysfunction |
| 5 | 107 | 0.957 | 2010 | Postoperative delirium |
| 6 | 78 | 0.993 | 2004 | Neurodevelopmental outcome |
| 7 | 58 | 0.982 | 1998 | Neuron-specific enolase |
| 8 | 57 | 0.934 | 2004 | s100b level |