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Table 1 Demographic, offense, clinical and traumatic exposure characteristics for overall sample and by NSSI status

From: Contributors to nonsuicidal self-injury in incarcerated youth

 

All participants (N = 358) n (%)

No self-injury (N = 266) n (%)

Lifetime NSSI (n = 92) n (%)

Lifetime nonsuicidal cuttinga (n = 49) n (%)

Female

116 (32.4)

79 (29.7)

37 (40.2)

(21) 42.9

Age (in years)b

17.2 (1.7)

17.3 (1.7)**

16.8 (1.8)

16.7 (1.9)

Highest academic gradeb

9.7 (1.6)

9.7 (1.5)

9.6 (1.6)

9.7 (1.9)

White (vs nonwhite)

171 (47.8)

110 (41.4)

61 (66.3)***

41 (83.7)***

Repeat offender status

325 (91.8)

241 (91.3)

84 (93.3)

44 (89.8)

Age at first offense (in years) b

13.0 (1.8)

12.9 (1.7)

13.1 (1.8)

13.1 (1.7)

Interpersonal offense

179 (50.1)

136 (51.3)

43 (46.7)

25 (51.0)

Mental health disorder or condition

 Any disorder

176 (49.2)

112 (42.1)

64 (69.6)***

30 (61.2)*

 Post-traumatic Stress Disorder

9 (2.5)

7 (2.6)

2 (2.2)

1 (2.0)

 Major Depressive Disorder*

22 (6.1)

10 (3.8)

12 (13.0)***

5 (6.1)

 Conduct Disorder

73 (20.4)

47 (17.7)

26 (28.3)*

14 (28.6)

 Substance Use Disorder

99 (27.7)

64 (24.2)

35 (38.0)*

18 (36.7)

 Past 4 weeks suicide attempt

4 (1.1)

0 (0.0)

4 (4.3)***

1 (2.0)*

 Lifetime suicide attempt

32 (9.0)

9 (3.4)

23 (25.0)***

14 (28.6)***

Traumatic Exposure

 Forced sexual activity

53 (14.8)

24 (9.1)

29 (31.5)***

16 (32.7)***

 Nonsexual assault

174 (48.7)

117 (44.2)

57 (62.0)**

31 (63.3)*

  1. Note. NSSI = Nonsuicidal self-injury. aIndividuals are a subset of those with lifetime NSSI and can have other nonsuicidal self-injurious behavior (i.e., they are not individuals who only engaged in nonsuicidal cutting); bMean (SD); ***p < 0.001; **p < 0.01; *p < 0.05 designate significant differences between NSSI group and non-injurers