TABLE 1.

Substance Use History by Offender Type (N = 117)

		First Time DUI Offenders (n = 56)	Repeat DUI Offenders (n = 61)
Alcohol
% ever used		96.4	100.0
Age of first use***		16.1	13.4
% used in the past year		69.6	85.2
Years used regularly***		4.9	11.1
Marijuana
% ever used*		73.2	90.2
Age of first use		15.6	14.8
% used in the past year		35.7	52.5
Years used regularly*		5.2	9.2
Powder Cocaine
% ever used**		35.7	63.9
Age of first use		19.9	21.7
% used in the past year		7.1	11.5
Years used regularly		0.3	0.5
Crack Cocaine
% ever used*		19.6	41.0
Age of first use		21.8	24.0
% used in the past year		3.6	8.2
Years used regularly		0.2	0.4
Inhalants
% ever used		5.4	13.1
Age of first use		15.3	11.9
% used in the past year		1.8	1.6
Years used regularly		0.0	0.1
Hallucinogens
% ever used**		21.4	44.3
Age of first use		18.8	18.3
% used in the past year		3.6	0.0
Years used regularly		0.3	0.3
Methamphetamine
% ever used		10.7	23.0
Age of first use		21.5	25.2
% used in the past year		1.8	4.9
Years used regularly		0.0	0.4
Amphetamines
% ever used**		10.7	34.4
Age of first use		16.0	19.5
% used in the past year*		1.8	13.1
Years used regularly		0.2	0.9
Sedatives, Tranquilizers, Barbiturates
% ever used		53.6	65.6
Age of first use		25.0	21.6
% used in the past year		50.0	50.8
Years used regularly*		1.5	3.4
Methadone
% ever used***		25.0	54.1
Age of first use		23.1	26.9
% used in the past year		12.5	25.0
Years used regularly		0.2	0.9
OxyContin®
% ever used**		26.8	50.8
Age of first use		24.6	25.2
% used in the past year		16.1	29.5
Years used regularly**		0.4	1.8
Other Non-prescribed Opiates/Analgesics
% ever used**		39.3	62.3
Age of first use		21.2	23.1
% used in the past year*		25.0	45.0
Years used regularly***		0.9	3.0
Any Drug
% ever used***		80.4	98.4
Age of first drug use		16.5	15.6
% used any drugs in the past year*		62.5	82.0
Years used illegal drugs regularly**		5.8	11.0

^*p ≤ .05;

^**p ≤ .01;

^***p ≤ .001