. Author manuscript; available in PMC: 2014 Apr 1.

Published in final edited form as: J Youth Adolesc. 2012 Nov 28;42(4):596–606. doi: 10.1007/s10964-012-9877-1

Table 2.

Prevalence (%) of physical perpetration and substance use at T1 and T2.

	Male	Female		χ² (1)
T1 Physical Perpetration (lifetime)	12.8	29.3		32.21^***
T2 Physical Perpetration (past year)	7.8	28.8		49.67^***
T1 Alcohol Use (lifetime)	68.0	71.3		1.06
T2 Alcohol (past year)	60.1	62.3		.40
T1 Marijuana (lifetime)	40.4	29.6		10.68^***
T2 Marijuana (past year)	40.3	28.6		11.44^***
T1 Hard Drug (lifetime)	11.2	11.1		.00
T2 Hard Drug (past year)	11.4	5.9		7.16 (1)^**

	Caucasian	Hispanic	African American	χ² (2)

T1 Physical Perpetration (lifetime)	12.9^a	20.0^b	33.7^c	34.39^***
T2 Physical Perpetration (past year)	11.8^a	19.5^b	28.4^c	20.17^***
T1 Alcohol Use (lifetime)	74.9^a	69.6^a,b	64.8^b	6.36^*
T2 Alcohol (past year)	71.5^a	60.2^b	51.1^c	21.56^***
T1 Marijuana (lifetime)	39.8^a	34.3^a,b	29.0^b	6.93^*
T2 Marijuana (past year)	40.4^a	31.6^a,b	29.1^b	7.94^*
T1 Hard Drug (lifetime)	15.5^a	10.6^a,b	7.2^b	9.27^**
T2 Hard Drug (past year)	11.3^a	9.2^a	4.0^b	8.77^**

Notes:

p < .05

^**

p < .01

^***

p < .001

Different superscripts denote significant differences between groups.