Glucose Metabolic Brain Network Differences between Chinese Patients with Lewy Body Dementia and Healthy Control

Table 2

The definitions of network parameters used in this study.

Parameters	Abbreviation	Equations	Meaning
Clustering coefficient		: number of nodes; : number of nodes connected with node; : actual connection edges among	A measure of the degree to nodes in a network which tend to cluster together
Characteristic path length		: number of nodes in a network; : the shortest path between node and	A measure of the efficiency of the information or mass transport on a network
Gamma	Gamma	rand: clustering coefficient of the corresponding random network	A network could be defined as small-world network when; gamma ≫ 1, lambda~1, and sigma > 1
Lambda	Lambda	: path length of the corresponding random network
Small-world coefficient	Sigma
Global efficiency	Global E		Measures how efficiently the network exchanges information
local efficiency	Local E	: subgraph of node
Betweenness centrality	BC	: shortest path pass between nodes and through node	An indicator of a node’s centrality in a network