Table 4.
The clusters information of co-cited references.
| Cluster | Size | Silhouette | Label | Mean |
|---|---|---|---|---|
| ID | (Year) | |||
| #0 | 41 | 0.919 | Digital X-ray radiogrammetry | 2005 |
| #1 | 40 | 0.955 | Anti-citrullinated protein antibodies | 2013 |
| #2 | 38 | 0.927 | Bone destruction | 2000 |
| #3 | 37 | 0.926 | Ankylosing spondylitis | 2006 |
| #4 | 36 | 0.881 | Risk factor | 2013 |
| #5 | 33 | 0.912 | Bone mineral density | 2000 |
| #6 | 25 | 0.989 | Soluble marker | 1994 |
| #7 | 23 | 0.965 | Steroid hormone | 1995 |
| #8 | 23 | 0.952 | Non-vertebral osteoporotic fracture | 2010 |
| #9 | 22 | 0.943 | Assessment tool | 2001 |
| #10 | 22 | 1 | Menopausal status | 1994 |
| #11 | 16 | 0.952 | Dangerous liaison | 2018 |
| #12 | 14 | 0.949 | Preventing joint destruction | 2016 |
| #13 | 10 | 0.984 | Noninvasive technique | 2002 |
| #14 | 8 | 1 | University hospital | 2003 |
| #15 | 6 | 0.986 | Benign metabolic bone disorder | 2007 |