Table 1.

Demographic characteristics of those who report problematic internet use

Variable		Total sample					Girls					Boys
		% with 3					% with 3					% with 3
		Total N	Total %	symptoms	Chi square	P value	Total N	Total %	symptoms	Chi square	P value	Total N	Total %	symptoms	Chi square	P value
African-American	Yes	305	8.57	3.61	0.1652	0.6844	168	8.62	2.98	0.9515	0.3293	137	8.51	4.38	0.3088	0.5784
	No	3,255	91.43	4.09			1,782	91.38	4.60			1,473	91.49	3.46
White	Yes	2,824	79.33	3.79	2.3063	0.1289	1,566	80.31	4.60	0.3459	0.5564	1,258	78.14	2.78	9.6853	0.0019
	No	736	20.67	5.03			384	19.69	3.91			352	21.86	6.25
Asian	Yes	140	3.93	7.86	5.4566	0.0195	62	3.18	8.06	1.9502	0.1626	78	4.84	7.69	4.1378	0.0419
	No	3,420	96.07	3.89			1,888	96.82	4.34			1,532	95.16	3.33
Other races	Yes	447	12.56	5.15	1.5950	0.2066	244	12.51	5.33	0.4911	0.4834	203	12.61	4.93	1.3062	0.2531
	No	3,113	87.44	3.89			1,706	87.49	4.34			1,407	87.39	3.34
Hispanic	Yes	412	11.99	6.07	4.5903	0.0322	222	11.77	5.86	0.9710	0.3244	190	12.26	6.32	4.8456	0.0277
	No	3,024	88.01	3.84			1,664	88.23	4.39			1,360	87.74	3.16
Grade	9th	1,079	30.35	4.82	2.5382	0.4684	609	31.29	4.93	0.8044	0.8484	470	29.21	4.68	2.7162	0.4375
	10th	988	27.79	3.85			540	27.75	4.26			448	27.84	3.35
	11th	943	26.53	3.50			509	26.16	3.93			434	26.97	3.00
	12th	545	15.33	3.85			288	14.80	4.86			257	15.97	2.72
Family Structure	One parent	788	22.42	3.81	0.8323	0.6596	461	24.02	3.90	1.3107	0.5193	327	20.49	3.67	0.1050	0.9488
	Two parents	2,578	73.34	4.11			1,377	71.76	4.72			1,201	75.25	3.41
	Other	149	4.24	2.68			81	4.22	2.47			68	4.26	2.94