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

Chapter 4: Cannabis Use and Harms (con't)

Table 4.7: Weekly or daily use of cannabis versus other use, current cannabis users 15-24, Canada 2004

	N	%	[95% CI]	OR	OR with age cannabis initiation
Total	730	43.7	[37.7, 49.9]
Sex				*	*
Male	423	50.9	[43.0, 58.7]	1.943*	2.022
Female [comparison group]	307	34.1	[25.8, 43.6]	--	--
Age [comparison group is previous]					**
15-17	154	36.3	[25.2, 49.1]	--	--
18-19	195	53.7	[41.7, 65.3]	2.350*	3.802**
20-24	378	41.2	[33.2, 49.7]	0.669	0.825
Region [comparison group is Canada]
Atlantic	170	36.8	[29.1, 45.1]	0.776	0.930
Quebec	68	51.8	[39.9, 63.4]	1.582*	1.450
Ontario	54	40.0Q	[27.4, 54.1]	0.872	0.852
Prairie	276	39.4	[33.7, 45.5]	0.852	0.825
British Columbia	159	44.5	[36.9, 52.4]	1.096	1.056
Household Location
Rural [comparison group]	97	41.3	[26.3, 58.1]	--	--
Non-rural	630	43.9	[37.6, 50.5]	1.145	1.507
Income Adequacy				*	*
Lowest [comparison group]	103	28.3	[17.4, 42.6]	--	--
Middle	230	41.2	[31.1, 52.0]	1.688	1.757
Highest	143	43.5	[30.4, 57.6]	1.774	1.909
Not stated	251	52.9	[42.6, 63.0]	3.099**	3.390**
Age Cannabis Initiation					**
					0.711**

Notes: Q = qualified due to high sampling variability;
*p < 0.05; **p < 0.01.

Table 4.8: Frequency reporting cannabis harm, as assessed by ASIST, among past 3-month users

	Sample size	Strong desire to use % [CI]	Health, social, legal problems % [CI]	Failed expectations % [CI]	Friends concern % [CI]	Failed control % [CI]
15-24	598	45.9 [39.3-52.6]	8.9 [5.9-13.3]	12.2 [8.7-16.7]	27.3 [22.0-33.2]	54.0 [47.2-60.7]
Male	364	45.8 [37.5-54.4]	9.2 [5.5-14.9]	13.8 [9.4-19.9]	30.4 [23.6-38.2]	58.5 [49.8-66.7]
Female	234	45.9 [35.3-56.9]	8.6 [4.2-16.7]	9.8 [5.2-17.6]	22.6 [15.1-32.5]	47.4 [36.8-58.3]
25+	868	36.2* [30.7-42.0]	4.1* [2.4-7.1]	6.2* [4.0-9.5]	14.1** [10.8-18.3]	34.5** [29.4-40.0]
Male	546	38.5 [31.6-45.9]	4.0 [2.0-7.7]	4.1 [2.3-7.2]	16.2 [11.8-21.8]	38.2 [31.6-45.2]
Female	322	29.9 [22.3-38.9]	4.5 [1.7-11.5]	11.8* [6.1-21.6]	8.7* [5.6-13.3]	24.8** [18.4-32.5]
15+	1,466	40.4 [36.2-44.8]	6.2 [4.5-8.6]	8.8 [6.7-11.4]	19.8 [16.8-23.2]	42.9 [38.6-47.3]
Male	910	41.3 [35.9-46.8]	6.0 [4.0-8.9]	7.8 [5.7-10.7]	21.7 [17.8-26.1]	46.0 [40.6-51.5]
Female	556	38.7 [31.9-45.9]	6.7 [3.8-11.6]	10.7 [6.8-16.4]	15.9 [11.5-21.6]	36.6* [30.0-43.8]
15-19	284	48.4 [38.8-58.2]	8.3 [4.6-14.5]	13.2 [8.2-20.5]	26.7 [19.5-35.4]	61.7 [51.9-70.7]
Male	166	45.3 [33.2-57.9]	s	13.3 [7.7-22.0]	28.2 [19.1-39.5]	64.8 [51.9-75.8]
Female	118	53.0 [37.7-67.7]	s	s	24.6 [13.9-39.6]	57.3 [41.9-71.5]
20-24	314	43.5 [34.6-52.8]	9.5 [5.4-16.4]	11.3 [7.1-17.6]	27.8 [20.6-36.3]	47.1* [38.1-56.4]
Male	198	46.3 [35.0-58.0]	s	s	32.4 [22.9-43.5]	53.0 [41.3-64.4]
Female	116	39.3 [25.7-54.7]	s	s	20.8 [11.3-35.2]	38.1 [24.9-53.5]

Note: s = estimate suppressed due to high sampling variability (or cell size less than 30);
*p < 0.05 **; p < 0.01 = differences in overall rates between youth aged 15-24 and adults aged 25+; overall rates between youth aged 15-19 and those aged 20-24; between males and females within each age group.

Table 4.9: Past 3-month users who experienced at least one problem due to cannabis use versus past 3-month users who did not, past 3-month users aged 15-24, Canada, 2004

	N	%	[95% CI]	OR	OR with cannabis use variable
Total	591	77.6	[71.8, 82.6]
Sex
Male	358	79.7	[72.5, 85.4]	1.494	1.107
Female [comparison group]	233	74.6	[64.3, 82.7]	--	--
Age [comparison group is previous]				*
15-17	119	83.7	[70.9, 91.5]	--	--
18-19	161	85.3	[75.9, 91.5]	1.514	0.809
20-24	311	71.3	[62.2, 78.9]	0.468	0.495
Region [comparison group is Canada]
Atlantic	148	69.9	[60.9, 77.5]	0.747	0.826
Quebec	55	70.9	[57.7, 81.3]	0.603	0.432*
Ontario	41	84.4	[70.2, 92.5]	1.840	1.980
Prairie	216	77.7	[71.4, 82.9]	1.003	1.145
British Columbia	131	80.4	[72.5, 86.4]	1.202	1.237
Household Location
Rural [comparison group]	79	83.9	[67.1, 93.0]	--	--
Non-rural	512	77.1	[70.8, 82.3]	0.774	0.687
Income Adequacy
Lowest [comparison group]	83	75.3	[57.8, 87.1]	--	--
Middle	187	76.1	[64.5, 84.8]	0.861	0.684
Highest	115	78.2	[63.9, 87.9]	0.922	0.787
Not stated	206	79.5	[69.7, 86.8]	0.802	0.439
Age Cannabis Initiation				*
				0.789*	0.870
Frequency of Cannabis Use					**
Less than monthly [comparison group]	167	61.4	[48.8-72.4]
Monthly	126	62.4	[46.9-75.8]		0.914
Weekly	141	87.4	[76.9-93.5]		4.331**
Daily	154	95.1	[85.6-94.8]		15.227**

Notes: *p < 0.05; **p < 0.01.