Table 2.

Descriptive statistics for study variables (n = 3,395)

Variable	M	SD	Range
Independent variables
Prevalence of alcohol content onlinea	1.22	0.76	0–4
Promotive alcohol or other drugs norms onlineb	1.27	0.82	CM
Anticipated regretb	2.55	0.92	0–4
Peer supportc	3.60	0.98	1–5
Online peer supportc	2.03	1.12	1–5
Peer substance used	2.83	0.89	1–5
Dependent variables
Past-30-day alcohol usee	1.67	1.55	0–5
Past-30-day marijuana usef	0.36	0.75	0–3

^aMeasured on 5-point scale where 0 = none, 1 = a few, 2 = some, 3 = most, 4 = almost all;

^bmeasured on 5-point scale where 0 = strongly disagree, 1 = disagree, 2 = neither agree or disagree, 3 = agree, 4 = strongly agree;

^cmeasured on 5-point scale where 1 = not true, 2 = a little true, 3 = somewhat true, 4 = pretty true, 5 = very true;

^dmeasured on 5-point scale where 1 = none, 2 = a few, 3 = some, 4 = most, 5 = I don’t know;

^emeasured on 5-point scale where 0 = never, 1 = once a month or less, 2 = 2–3 times a month, 3 = about once a week, 4 = 2–6 times a week, 5 = one or more times a day; ^fmeasured on a 4-point scale where 0 = never, 1 = 3 or fewer times a month, 2 = 1–6 times a week, 3 = daily use.