Table 1.

Comparison of the MDD network, Myspace (in [35]), MedHelp friendship networks (in [10]), and other simulated networks.

Network metric	MDD	Myspace	Erdös-Rényi model	Barabási-Albert model	MDD-friend	MedHelp	Erdös-Rényi -friend model	Watts-Strogatz model
Type	Directed	Directed	Directed	Directed	Undirected	Undirected	Undirected	Undirected
Nodes	5050	36,459	5050	5050	5050	30,915	5050	5050
Edges	36,657	80,675	36,657	36,657	17,401	113,273	17,401	17,401
Connected components	162	1	1	1	162	2	5	2
Nodes in the largest weakly connected component	4881	36,459	5050	5050	4881	30,870	5046	5049
Network density (10–5 scale)	143.8	6.07	143.8	138.6	136.5	23.7	136.5	136.5
Network diameter	10	11	8	11	11	—	8	8
Network reciprocity (10–2 scale)	34.0	1.45	0.08	0.03	—	—	—	—
Clustering coefficient (10–2 scale)	4.47	0.031	0.29	0.64	4.47	3.1	0.13	1.19
Average shortest path length	4.11	5.14	4.53	2.83	3.80	3.81	4.64	4.69
Power law exponent (in/out)	2.13/2.20	2.65/1.99	—	2.15/3.01	2.29	2.12	—	—
Min degree (in/out)	0/0	1/0	5/5	0/4	0	—	0	3
Max degree (in/out)	451/942	558/6077	19/20	6053/7	464	—	19	27