Table 1.
Sociodemographic and clinical characteristics by group.
| NSSI | HC | P | ||
|---|---|---|---|---|
| N (% female) | 170 (84.12) | 43 (95.55) | 0.019 | |
| Age (SD) | 15.04 (1.47) | 14.74 (1.31) | 0.228 | |
| School type, n (%) | 0.086 | |||
| Hauptschule | 19 (11.18) | 1 (2.33) | ||
| Realschule | 63 (37.06) | 14 (32.56) | ||
| Gymnasium | 61 (35.88) | 27 (62.79) | ||
| Other | 27 (15.88) | 1 (2.33) | ||
| IQ (SD) | 100.83 (1.07) | 106.56 (1.78) | 0.014 | |
| Right-handedness, n (%) | 154 (90.59) | 40 (93.02) | 0.617 | |
| BMI (SD) | 21.58 (0.34) | 20.34 (0.51) | 0.096 | |
| DIKJ (SD) | 28.41 (9.94) | 6.21 (4.03) | <.001 | |
| KIDSCREEN-52 (SD) | 34.95 (6.93) | 56.07 (8.43) | <.001 | |
| CECA-Q3 (SD) | 0.35 (0.30) | 0.02 (0.07) | <.001 | |
| SCL-90-R (SD) | 1.55 (0.74) | 0.21 (0.17) | <.001 | |
| CGI-S (SD) | 4.96 (0.76) | - | ||
| GAF (SD) | 49.76 (8.97) | - | ||
| Comorbidity (ICD-10), n (%) | ||||
| F0X | 0 | - | ||
| F1X | 40 (23.53) | - | ||
| F2X | 0 | - | ||
| F3X | 99 (58.24) | - | ||
| F4X | 69 (40.59) | - | ||
| F5X | 18 (10.59) | - | ||
| F6X | 60 (35.29) | - | ||
| F7X | 0 | - | ||
| F8X | 2 (1.18) | - | ||
| F9X | 54 (31.76) | - | ||
| Number of suicide attempts (SD) | ||||
| lifetime | 10.81 (58.57) | - | ||
| past 12 months | 1.60 (8.37) | - | ||
| past 6 months | 1.71 (4.74) | - | ||
| Number of NSSI events (SD) | ||||
| past 12 months | 75.56 (92.84) | - | ||
| past 6 months | 38.37 (40.21) | - | ||
Note. NSSI = non-suicidal self-injury, HC = healthy controls, SD = standard deviation, IQ = intelligence quotient, BMI = body mass index, DIKJ = Depression Inventory for Children and Adolescents, KIDSCREEN-52 = Health-related quality of life questionnaire, CECA-Q3 = Childhood Experiences of Care and Abuse questionnaire, SCL-90-R = Symptom Checklist 90-Revised, CGI-S = Clinical Global Impression Scale, GAF = Global Assessment of Functioning.