Table 2.

Selected sociodemographic and cannabis use frequencies by gender

	Boys (n = 4,064)		Girls (n = 4,099)
Characteristic	Frequency	Percent	Frequency	Percent	p-value
Grade					<0.01
7–8	920	23.0	948	23.4
9	808	20.2	761	18.8
10	885	22.1	1,032	25.4
11	858	21.5	845	20.8
12	528	13.2	471	11.6
Ethnicity					0.73
White	2,793	72.2	2,925	73.0
Aboriginal	647	16.7	652	16.3
Other	429	11.1	431	10.8
Self-reported economic status of family compared with rest of province					<0.01
Better	1,393	39.3	1,291	34.8
About the same	1,708	48.2	1961	52.8
Worse	441	12.5	461	12.4
Lifetime cannabis use					<0.01
0 times	1,966	51.9	2,069	52.9
1–2 times	359	9.5	356	9.1
3–9 times	257	6.8	407	10.4
10–19 times	195	5.1	266	6.8
20–39 times	195	5.1	254	6.5
40–99 times	194	5.1	204	5.2
100 or more times	624	16.5	356	9.1
Cannabis use in past 30 days (of those who have used cannabis) (n = 3646)					<0.01
0 times	686	37.9	759	41.4
1–2 times	314	17.3	423	23.1
3–9 times	229	12.6	294	16.0
10–19 times	153	8.4	135	7.4
20–39 times	109	6.0	79	4.3
40 or more times	320	17.7	142	7.8
Age first used cannabis (n = 3638)					<0.01
< 9 years	157	8.7	53	3.5
10 years	79	4.4	53	3.5
11 years	119	6.6	79	5.2
12 years	286	15.8	261	17.1
13 years	406	22.5	208	13.6
14 years	369	20.4	425	27.8
15 years	245	13.6	295	19.3
16 years	112	6.2	130	8.5
≥ 17years	32	1.8	24	1.6