Table 4.
Major clusters of co-cited references.
| ID | Size | Silhouette | Label (LSI) | Label (LLR) | Label (MI) | Year Ave. |
|---|---|---|---|---|---|---|
| 0 | 39 | 0. 964 | Income inequality | Income inequality | Evaluating wilkinsons income inequality hypothesis | 2003 |
| 1 | 34 | 0.960 | Income inequality | Social capital | Heat island effect | 1996 |
| 2 | 30 | 0. 895 | Population health | Global burden | Heat island effect | 2015 |
| 3 | 26 | 0.994 | Global burden | Global burden | Heat island effect | 2011 |
| 4 | 25 | 0.751 | Systematic review | Physical activity | Heat island effect | 2015 |
| 5 | 22 | 0.978 | Covid-19 pandemic | Structural racism | Inequality-related health | 2017 |
| 6 | 15 | 0.962 | Health promotion | Health promotion | Global burden | 1992 |
| 7 | 13 | 0.944 | Aligning financial incentive | Purchasing population health | Global burden | 1992 |
| 8 | 13 | 1.000 | Information system | Information system | Global burden | 1991 |
| 9 | 12 | 0.987 | Health inequalities | Health inequalities | Deteriorating self-rated health | 2008 |
| 10 | 11 | 1.000 | Physical activity | Healthy cities | Heat island effect | 2016 |
| 11 | 9 | 0.987 | Planning | Planning | Global burden | 1988 |
| 12 | 6 | 0.958 | Income inequality | Income inequality | Global burden | 1988 |
| 13 | 5 | 1.000 | Income inequality | Causal review | Unequal developing country | 2008 |
Note: Clusters are represented according to the labels selected by the log-likelihood ratio test method (LLR).