Age (years) | M (SD) | 15.7 (1.3) | Â |
Min-max | 13.4–17.7 |  | |
Gender | Female | 19 | 76% |
Male | 1 | 4% | |
Other (non-binary) | 5 | 20% | |
Country of birth | Sweden | 24 | 96% |
Other European country | 1 | 4% | |
Gender of treatment responsible parent | Female | 22 | 88% |
Male | 3 | 12% | |
Treatment responsible parent’s educational level | Primary | 1 | 4% |
Secondary | 7 | 28% | |
University | 17 | 68% | |
Ongoing psychotropic medication | Yes | 8 | 32% |
Earlier psychological treatments | Yes | 15 | 60% |
Mean length in months (SD) | 11.9 (16.4) | Â | |
Meeting full diagnostic criteria for BPD | Yes | 5 | 20% |
Mean number of BPD criteria | Â | 3.2 (1.6) | Â |
Adolescent’s report on age of NSSI onset | M (SD) | 13.3 (1.3) |  |
Parent’s report on age of their child’s NSSI onset | M (SD) | 14.1 (1.6) |  |
NSSI frequency past 12Â months | Median | 103 | Â |
IQR | 25–197 |  | |
Frequency of co-occurring disorders | Depression | 13 | 52% |
Panic disorder | 9 | 36% | |
ADHD | 3 | 12% | |
Social anxiety disorder | 13 | 52% | |
Separation anxiety | 1 | 4% | |
Specific phobia | 2 | 8% | |
Bulimia nervosa | 1 | 4% | |
GAD | 7 | 28% | |
BDD | 5 | 20% | |
Number of participants with 0 - ≥5 co-occurring disorders | None | 2 | 8% |
One | 3 | 12% | |
Two | 9 | 36% | |
Three | 5 | 20% | |
Four | 2 | 8% | |
≥Five | 5 | 16% |