Table 3.

Comparisons of Mutually Exclusive Social Media Use Groups at T1

	Neither N=165	Facebook only N=223	Myspace only N=356	Both N=513	(X²) p-value
Female (%)	37	48	51	56	<.001
Hispanic (%)	73	23	87	66	<.001
Speak mostly English at home (%)	32	40	29	33	.021
Socioeconomic status (mean)	.69	.89	.59	.72	F < .001
Academic achievement (% As and Bs)	35	64	26	35	<.001
Ever smoked (%)	19	8	41	32	<.001
Ever drank alcohol (%)	43	35	69	65	<.001