Table 1. Summary statistics for the co-authorship networks based on methodology quality.
| All | Low quality | Moderate quality | High quality | |||
|---|---|---|---|---|---|---|
| 1. Whole network statistics | Nodes | Number of nodes | 955 | 288 | 576 | 216 |
| Number of authors | 735 | 228 | 455 | 181 | ||
| Number of papers | 220 | 61 | 121 | 35 | ||
| Edges | Number of edges (unique) | 1,349 | 371 | 763 | 215 | |
| Papers by author | 1.8 (1-26) | 1.6 (1-10) | 1.7 (1-16) | 1.2 (1-3) | ||
| Author per paper | 6.3 (2-20) | 6.2 (2-15) | 6.3 (2-20) | 6.1 (3-16) | ||
| Average collaborators | 8.9 (2-14) | 9.3 (2-15) | 8.9 (2-20) | 7.9 (3-16) | ||
| Edge density | 2.8 | 2.5 | 2.6 | 1.9 | ||
| Average distance | 6.3 | 3.2 | 2.8 | 2.7 | ||
| Network diameter | 14 | 8 | 6 | 10 | ||
| 2. Centrality | Activity: Degree | 0.024 | 0.043 | 0.03 | 0.065 | |
| Efficiency: Closeness | 0.0004 | 0.001 | 0.0003 | 0.0008 | ||
| Control: Betweenness | 0.034 | 0.020 | 0.005 | 0.013 | ||
| Overall: Eigenvector | 0.96 | 0.92 | 0.95 | 0.97 | ||
| 3. Community detection | Connectance | 0.003 | 0.009 | 0.004 | 0.009 | |
| Clustering coefficient | 0 | 0 | 0 | 0 | ||
| Compartmentalization | 0.004 | 0.015 | 0.007 | 0.026 | ||
| Assortativity | 0.44 | 0.12 | 0.28 | -0.61 | ||
| Number of communities | 90 | 37 | 65 | 25 | ||
| Modularity | 0.90 | 0.76 | 0.89 | 0.93 | ||
| Giant component size (%) | 225 | 60 (20.8%) | 69 (12%) | 31 (14.3%) | ||
Results of main statistics of whole author-paper affiliation network and included subnetworks corresponding to SRs and MAs on psoriasis of low, moderate, and high methodological quality.