Table 1.

Same Characteristics and Statistics Measure Summary Information (N = 1025)

Age	Range	14–18
	M (SD)/missing	17.40 (0.82)/n = 0
Sex	Male/female/missing	n = 522/ n = 499/n = 4
Ethnicity	Non-Hispanic/Hispanic/missing	n = 250/ n = 752/n = 23
Family e-cigarette use (T1)	No/yes/missing	n = 802/ n = 147/n = 76
Peer e-cigarette use (T1)	M (SD)/missing	1.25 (1.45)/n = 228
Positive expectancies (T1)	M (SD)/missing	1.92 (1.11)/n = 43
Willingness (T1)	M (SD)/missing	1.63 (1.01)/n = 32
Adolescent e-cigarette use (T1; past 30 days)	0 times	n = 780
	1–10 times	n = 103
	11–20 times	n = 30
	21 or more times	n = 59
	Missing	n = 53
Adolescent cigarette use (T1; past 30 days)	0 times	n = 818
	1–10 times	n = 78
	11–20 times	n = 27
	21 or more times	n = 52
	Missing	n = 50
Adolescent marijuana use (T1; past 30 days)	0 times	n = 598
	1–10 times	n = 133
	11–20 times	n = 44
	21 or more times	n = 171
	Missing	n = 79
Adolescent cigarette use (T2; past 30 days)	0 times	n = 780
	1–10 times	n = 103
	11–20 times	n = 30
	21 or more times	n = 59
	Missing	n = 53
Adolescent marijuana use (T3; past 30 days)	0 times	n = 530
	1–10 times	n = 69
	11–20 times	n = 29
	21 or more times	n = 127
	Missing	n = 270