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. 2018 Mar 26;12(5):1275–1285. doi: 10.1177/1557988318763522

Table 1.

The Gender Difference in NSSI Behaviors Among Middle-School Students.

Male middle-school students
Female middle-school students
Cases/mean (percentage/SD)
Cases/mean (percentage/SD)
Yes No Yes No
The prevalence of NSSI behaviors 163 (37.6%) 271 (62.4%) 132 (39.1%) 206 (60.9%)
X2 = 0.71
The frequency of NSSI behaviors 0.54 (1.35) 0.55 (1.18)
t = 0.095
The types of NSSI behaviors 1.18 (0.13) 0.88 (0.08)
t = 1.96*
The motivations of NSSI behaviors 2.36 (1.34) 2.36 (1.23)
t = −0.022
Body parts of NSSI behaviors (top five) Hand (48 person-times) Hand (54 person-times)
Arm (46 person-times) Arm (53 person-times)
Wrist (35 person-times) Wrist (29 person-times)
Head (20 person-times) Face (12 person-times)
Face (20 person-times) Thigh (10 person-times)
Methods of NSSI behaviors (top three) To scratch or tear skin (51 person-times) To scratch or tear skin (56 person-times)
Not to let the wound heal intentionally (39 person-times) To severely scratch skin with nails or other objects (e.g., glass slag, needles, thumbtacks), resulting in bleeding and leaving scars (41 person-times)
To pull hair, eyelashes or eyebrows consciously and violently (34 person-times) To pull hair, eyelashes or eyebrows consciously and violently (32 person-times)
Motivations of NSSI behaviors (top three) I am very angry with myself, so decided to try (20 person-times) I am very angry with myself, so decided to try (18 person-times)
Unable to remember (19 person-times) Unable to remember (14 person-times)
To show courage (18 person-times) I am very angry with others, and decide to try (12 person-times)
Consequences of NSSI behaviors (top three) Difficult to deal with interpersonal relationships (32 person-times) Difficult to deal with interpersonal relationships (17 person-times)
Unable to complete studies or work (27 person-times) Difficult to realize self-worth/self-esteem (15 person-times)
Unable to engage in things of interest (20 person-times) Unable to engage in things of interest (13 person-times)

Note. NSSI = nonsuicidal self-injurious. *p < .05.