Table 1.

Chi-square analysis of sociodemographic characteristics of adolescents stratified by self-injurious behavior

	Total sample (N = 2,624)		Non-self-injurious Behavior (N = 2,142)		Self-injurious behavior (N = 482)
Dependent variable	N	%	N	%	N	%	χ 2	P
Gender							26.88	<0.001
Male	900	34.30%	784	36.60%	116	24.07%
Female	1724	65.70%	1,358	63.40%	366	75.93%
Race/ethnicity
Caucasian							<0.001	1.00
No	675	25.72%	551	25.72%	124	25.73%
Yes	1949	74.28%	1,591	74.28%	358	74.27%
African-American							1.40	0.24
No	2,430	92.61%	1977	92.30%	453	93.98%
Yes	194	7.39%	165	7.70%	29	6.02%
Asian							0.50	0.48
No	2,537	96.68%	2074	96.83%	463	96.06%
Yes	87	3.32%	68	3.17%	19	3.94%
Hispanic							0.57	0.45
No	2,394	91.23%	1959	91.46%	435	90.25%
Yes	230	8.77%	183	8.54%	47	9.75%
Other							0.02	0.90
No	2,460	93.75%	2007	93.70%	453	93.98%
Yes	164	6.25%	135	6.30%	29	6.02%
Grade							10.81	0.01
9th	801	30.53%	624	29.13%	177	36.72%
10th	719	27.40%	600	28.01%	119	24.69%
11th	700	26.68%	584	27.26%	116	24.07%
12th	404	15.40%	334	15.59%	70	14.52%
Family structure							25.76	<0.001
One parent	606	23.09%	466	21.76%	140	29.05%
Two parents	1888	71.95%	1,584	73.95%	304	63.07%
Other	130	4.95%	92	4.30%	38	7.88%