TABLE 2.

Consolidated Properties of the QuitNet Online Social Network for Smoking Cessation: March 1, 2007–April 30, 2007

	Weakly Connected Core
Size	7569
Tiesa	103 592
Clustering coefficientb	0.173
Average shortest path lengthc	3.320
Mean degreed	13.686
Tie reciprocitye	0.309
Diameterf	12

Note. Analyis included buddies, forums, and private internal e-mail messages.

^aConnections between 2 participants, such as a communication or friendship.

^bQuantifies the likelihood that the neighbors of any given actor (an individual with connections to others in the network) are also connected⁴¹ and indicates the level of local clustering within the network.

^cAverage of the shortest number of ties required to connect any 2 participants.

^dAverage number of connections per participants.

^ePercentage of ties that were reciprocated between participants in the network.

^fMaximum path length (as measured by the number of ties between actors) to connect participants in the network, when the shortest path is selected for any 2 individuals.