Table 7.

The Distribution of Network Members’ Self-Reported Substance Use by Substance Use of Participants at Time 1 and Time 2.

	Participant Report
	Time 1			Time 2
	Alcohol only users (n =472)	Concurrent users (n = 99)	Simultaneous users (n = 316)	Alcohol only users (n = 296)	Concurrent users (n = 137)	Simultaneous users (n = 318)
Proportion of network members who self-reported:
No substance use	17.2%	12.9%	6.8%	15.2%	12.2%	5.5%
Alcohol Only	50.9%	34.3%	30.5%	47.6%	32.9%	25.4%
Cannabis Only	0.2%	0.7%	0.5%	0.6%	0.6%	0.7%
Concurrent Use	7.6%	13.3%	9.8%	12.9%	20.7%	13.4%
Simultaneous Use	24.1%	38.8%	52.4%	23.7%	33.7%	55.0%

Note: The number of participants in Table 7 does not match the number of participants in Table 1. Participants who are not included in Table 7 did not nominate anyone in the sociocentric network (i.e., their nominations are 0), nominated peers who did not participate themselves, or nominated peers who were participants but did not provide any self-report data.