Prevalence and Means of Covariates in Longitudinal Analytical Samples by Wave 3

Predictors by Wave 3	Nicotine Dependence (n = 419)	Anxiety Disorder (n = 686)	Mood Disorder (n = 626)	Disruptive Disorder (n = 580)
Age, mean (SD), y	15.13 (1.36)	15.18 (1.31)	15.17 (1.32)	15.24 (1.31)
Female, %	50.8	52.2	50.4	54.6
Race/ethnicity
White, %	26.4	27.8	27.0	28.6
African American, %	30.3	32.0	32.9	29.8
Hispanic, %	43.3	40.2	40.1	41.6
Anxiety disorder lifetime, %	5.8	—	5.8	6.5
Mood disorder lifetime, %	12.3	14.7	—	14.4
Disruptive disorder lifetime, %	15.2	20.7	19.9	—
Any psychiatric disorder lifetime, %	28.0	—	—	—
Novelty seeking, mean (SD)	2.88 (0.74)	2.56 (0.65)	2.55 (0.64)	2.51 (0.64)
Smoked/nicotine dependence lifetime
Smoked, no dependence criteria, %	—	58.2	59.9	61.7
1+ dependence criteria, %	—	41.8	40.1	38.3
Alcohol, marijuana or other illicit drug use/abuse/dependence lifetime
Never used, %	22.7	17.3	17.9	19.0
Used, never abused/dependent, %	63.2	58.3	58.7	61.6
Ever abused/dependent, %	14.2	24.4	23.4	19.5
Age at onset of smoking, mean (SD), y	12.78 (2.12)	12.82 (2.14)	12.84 (2.10)	12.92 (2.12)
Initial sensitivity to tobacco
Pleasant experiences, mean (SD)	1.19 (0.34)	1.35 (0.49)	1.34 (0.48)	1.34 (0.49)
Unpleasant experiences, mean (SD)	1.64 (0.56)	1.64 (0.54)	1.63 (0.53)	1.64 (0.54)
No. cigarettes smoked lifetime, mean (SD)	3.78 (11.73)	19.49 (33.41)	19.56 (33.28)	16.52 (30.82)
Other tobacco use lifetime, %	28.7	34.1	33.7	33.0
Peer smoking currently, %	82.7	88.7	87.9	88.5
Sibling smoking lifetime, %	47.5	53.1	53.0	50.8
Parent smoking/nicotine dependence lifetimea
Never smoked, %	28.9	27.1	27.1	27.6
Smoked, never dependent, %	45.7	45.3	46.4	47.5
Ever dependent, %	25.4	27.6	26.6	24.8
Parent depression lifetime,a %	14.9	13.6	11.2	13.8
Parent delinquency lifetime,a mean (SD)	0.66 (1.44)	0.73 (1.43)	0.65 (1.34)	0.71 (1.48)

Note: Weighted estimates, unweighted n's.

^aParent report.