Substance Use by Canadian Youth - A National Survey of Canadians' Use of Alcohol and Other Drugs - Canadian Addiction Survey (CAS)

Chapter 8: Changes Across Time (con't)

Table 8.7: Percentages reporting lifetime and past-year use of any illicit drugs¹, Canada, aged 15-24, 1989, 1994 and 2004

Notes: * Significantly different from CAS.
CI = confidence interval.
Data for this category were not available from the NADS (1989).
¹Any illicit drugs include cannabis, cocaine/crack, LSD in CADS; and hallucinogens in CAS; speed; and heroin.

Table 8.8: Percentages reporting lifetime use of illicit drugs, Canada, aged 15-24, 1989, 1994 and 2004

	NADS 1989 % [CI]	CADS 1994 % [CI]	CAS 2004 % [CI]
Cannabis	33.6 [30.7-36.6]	39.2 [36.5-42.1]	61.4* [57.7-65.0]
Males	36.8 [32.4-41.3]	44.6 [40.5-48.8]	64.7* [59.3-69.7]
Females	30.3 [26.6-34.3]	33.6 [30.0-37.4]	58.0* [52.7-63.2]
Cocaine/Crack	4.9 [3.8-6.3]	3.7 [2.9-4.8]	12.5* [10.3-15.1]
Males	5.7 [4.1-7.8]	3.7 [2.6-5.2]	14.4* [11.1-18.4]
Females	4.0 [2.7-6.1]	3.8 [2.6-5.5]	10.6* [7.9-14.2]
LSD or hallucinogens 1	(2)	10.8 [9.1-12.7]	16.4* [13.9-19.3]
Males	(2)	13.9 [11.3-17.1]	20.4 [16.5-24.8]
Females	(2)	7.5 [5.7-9.8]	12.2 [9.2-16.0]
Speed	(2)	2.6 [1.8-3.7]	9.8* [7.9-12.2]
Males	(2)	s	11.3* [8.5-14.9]
Females	(2)	s	8.3* [5.8-11.6]
Heroin	(2)	s	s
Males	(2)	s	s
Females	(2)	s	s
LSD/speed/heroin	4.6 [3.6-6.0]	11.6* [9.8-13.5]	19.3* [16.6-22.3]
Males	5.5 [4.0-7.5]	14.8* [12.1-18.1]	23.1* [19.0-27.7]
Females	3.7 [2.4-5.8]	8.1* [6.2-10.5]	15.4* [12.0-19.4]

Notes: S = estimate suppressed due to high sampling variability.
* Significantly different from previous survey.
CI = confidence interval.
1. In CADS and NADS, the question asked about use of LSD, but in the CAS the question asked about use of hallucinogens, PCP or LSD.
2. The NADS presented data for LSD/speed/heroin in an aggregate category.

Table 8.9: Percentage of lifetime users¹ reporting various types of harm from one's own drug use in their lifetime, Canada, aged 15-24, 1994 and 2004

Notes: CI = confidence interval.
1. Lifetime use: use in lifetime of at least one of the following drugs: cannabis (excluding one-time only), cocaine/crack, LSD or hallucinogens, speed, heroin, steroids or solvents. Numbers differ between this table and Table 5.9 because a different definition of users was used here to accommodate the CADS data.
2. Home life or marriage questions asked separately in CADS.

Table 8.10 Percentages of respondents reporting having driven after consuming two or more drinks in the previous hour; within 2 hours of having used cannabis or hash, Canada, aged 15-24, 1989, 1994 and 2004

	NADS 1989 % [CI]	CADS 1994 % [CI]	CAS 2004 % [CI]
During the past 12 months have you driven a motor vehicle after having 2 or more drinks in the previous hour? 1	27.2 [23.8-30.8]	25.4 [22.2-28.9]	20.9 [14.8-28.7]
During the past 12 months have you driven a motor vehicle within 2 hours of consuming cannabis or hashish? 2	25.8 [19.8-32.9]	31.9 [24.5-40.4]	39.8 [27.5-53.5]

Notes: CI = confidence interval.
1. Asked of those youth who had both driven in the past 12 months and used alcohol in the past 12 months.
2. Asked of those youth who had driven in the past 12 months and used cannabis in the past 12 months.