Table 1.

Clinical and Sociodemographic Characteristics of the Sample; ICD-10 diagnoses: multiple diagnoses possible; BPD: borderline personality disorder based on SCID interview; NSSI frequency based on SITBI interview; school: after four years of elementary school the German school system branches into three types of secondary schools. The so called Hauptschule (Secondary General School which takes five years after Primary School) prepares pupils for vocational training, whereas the Realschule (Intermediate Secondary School) concludes with a general certificate of secondary education after six years. Eight years of Gymnasium provide pupils with a general university entrance qualification

N (female)	73 (73)
Age, mean (SD)	15.48 (1.19)
School, n (%)
Hauptschule	4 (5.48)
Realschule	28 (38.36)
Gymnasium	28 (38.36)
Other	13 (17.8)
ICD-10 diagnoses, n (%)
F1	21 (28.77)
F2	1 (1.37)
F3	49 (67.12)
F4	39 (53.42)
F5	11 (15.07)
F6	24 (32.88)
F9	14 (19.18)
NSSI frequency past year, mean (SD)	104.88 (117.99)
BPD, n (%)	41 (56.16)
BPD criteria, mean (SD)	4.68 (2.04)