Table 1.

Student level descriptive characteristics of youth from Y6 of the COMPASS Study (N = 60,601).

Variable		Total		Females (n = 30,840)		Males (n = 29,761)		Chi-square / T-test
		Freq	%	Freq	%	Freq	%	DF	Value	P-value
Grade	9 (Median age 14)	14,524	24.0	7420	24.1	7104	23.9	4	4.2748	0.3701
	10 (Median age 15)	14,881	24.6	7604	24.7	7277	24.5
	11 (Median age 16)	14,143	23.3	7233	23.5	6910	23.2
	12 (Median age 17)	9229	15.2	4608	14.9	4621	15.5
	Other (Median age 13)	7824	12.9	3975	12.9	3849	12.9
Ethnicity	White	40,663	67.1	20,849	67.6	19,814	66.6	1	7.2318	0.0072
	Other	19,938	32.9	9991	32.4	9947	33.4
Weekly Spending Money	Zero	9688	16.0	4381	14.2	5307	17.8	4	375.9206	<0.0001
	$1-$20	15,399	25.4	7996	25.9	7403	24.9
	$21-$100	14,433	23.9	7862	25.5	6571	22.1
	$100+	11,320	18.7	5224	16.9	6096	20.5
	Don't Know	9761	16.0	5377	17.4	4384	14.7
School Sport Participation	None	33,332	55.0	17,962	58.2	15,370	51.6	3	357.3623	<0.0001
	Intramurals Only	6430	10.6	3366	10.9	3064	10.3
	Varsity Only	6569	10.8	2944	9.6	3625	12.2
	Both	14,270	23.6	6568	21.3	7702	25.9
Binge drinking	No	49,904	82.4	25,907	84.0	23,997	80.6	1	118.4848	<0.0001
	Yes	10,697	17.6	4933	16.0	5764	19.4
Cannabis use	No	52,384	86.4	27,223	88.3	25,161	84.5	1	179.6085	<0.0001
	Yes	8217	13.6	3617	11.7	4600	15.5
Cigarette smoking	No	54,827	90.5	28,209	91.5	26,618	89.4	1	72.3806	<0.0001
	Yes	5774	9.5	2631	8.5	3143	10.6
E-cigarette use	No	47,290	78.0	25,306	82.1	21,984	73.9	1	592.2998	<0.0001
	Yes	13,311	22.0	5534	17.9	7777	26.1
Number of substances used	0	40,894	67.5	21,773	70.6	19,121	64.3	4	398.7820	<0.0001
	1	8952	14.8	4397	14.3	4555	15.3
	2	5282	8.7	2446	7.9	2836	9.5
	3	3409	5.6	1470	4.8	1939	6.5
	4	2064	3.4	754	2.4	1310	4.4
School connectedness (Mean, SD)		18.3	3.4	18.2	3.3	18.5	3.4	60,197	−13.35	<0.0001