Table 2.

Health and functioning measures and association with lifetime video game playing, by gender

		Total Sample					Boys					Girls
Variable		N	%	% play video games ever	X2	p	N	%	% play video games ever	X2	p	N	%	% play video games ever	X2	p
Grade average	A's and B's	2319	59.11	48.68	15.48	0.0004	941	52.05	78.21	6.7393	0.0344	1361	65.5	28.14	2.5883	0.2741
	C's	1157	29.49	54.8			594	32.85	75.76			549	26.42	31.51
	D's and F's	447	11.39	55.7			273	15.1	70.7			168	8.08	31.55
Extra-curricular activities	Yes	3056	75.87	50.95	0.43	0.5104	1382	74.91	76.48	0.087	0.768	1642	76.76	29.05	0.098	0.7543
	No	972	24.13	52.16			463	25.09	75.81			497	23.24	29.78
Smoking, lifetime
	Never	2441	62.41	54.4	34.34	<0.0001	1146	64.53	79.58	29.91	<0.0001	1268	60.53	31.39	12.42	0.002
	Occasionally	949	24.26	43.73			397	22.35	71.54			546	26.06	23.26
	Regularly	521	13.32	47.22			233	13.12	66.52			281	13.41	30.25
Marijuana, lifetime	Yes	1476	39.07	47.29	11.72	0.0006	689	40.39	70.68	16.85	<0.0001	772	25.78	25.78	7.11	0.0077
	No	2302	60.93	53			1017	59.61	79.35			1259	61.97	31.32
Sip of alcohol, lifetime	Yes	3312	86.72	49.34	21.36	<0.0001	1444	84	75.48	1.49	0.2228	1833	89.07	28.31	7.87	0.005
	No	507	13.28	60.36			275	16	78.91			225	37.33	37.33
Current alcohol frequency	Never regular	756	31.01	48.81	2.81	0.4233	338	32.1	75.74	4.19	0.2419	412	30.18	26.46	5.74	0.1249
	Light	704	28.88	48.15			295	28.02	72.54			402	29.45	30.35
	Moderate	697	28.59	44.76			286	27.16	75.17			406	29.74	22.91
	Heavy	281	11.53	46.26			134	12.73	67.16			145	10.62	26.9
Other drug use, lifetime	Yes	305	9.17	54.43	1.33	0.2483	156	10.3	71.79	1.66	0.1971	144	8.09	34.03	1.28	0.2576
	No	3022	90.83	50.96			1359	89.7	76.45			1636	91.91	29.52
Caffeine use	None	785	20.03	46.11	13.58	0.0011	390	21.87	66.41	26.74	<0.0001	381	18.2	24.67	8.83	0.0121
	1-2 drinks per day	2134	54.45	50.98			922	51.71	79.61			1195	57.1	28.79
	2+ drinks per day	1000	25.52	54.9			471	26.42	77.28			517	24.7	33.66
Sad or hopeless 2+weeks	Yes	835	21.78	47.19	6.27	0.0123	269	15.57	76.97	1.13	0.2874	556	26.9	27.66	7.85	0.0051
	No	2999	78.22	52.08			1459	84.43	73.98			1511	73.1	33.99
Serious fights	Yes	265	6.75	61.13	11.95	0.0005	166	9.33	71.69	2.02	0.1548	91	4.32	39.56	4.97	0.0258
	No	3660	93.25	50.14			1613	90.67	76.63			2014	95.68	28.7
Carry a weapon	Yes	742	18.81	67.65	101.58	<0.0001	552	30.79	74.46	1.49	0.2217	176	8.35	44.32	21.51	<0.0001
	No	3202	81.19	47.13			1241	69.21	77.12			1933	91.65	27.73