Compared with the DBT-I group , interventions that included skills training resulted in greater improvements in the frequency of NSSI acts ( F@ ,@ = @ -LSB- P < @ -RSB- for standard DBT and F@ ,@ = @ -LSB- P < @ -RSB- for DBT-S ) and depression ( t@ = @ -LSB- P = @ -RSB- for standard DBT and t@ = @ -LSB- P = @ -RSB- for DBT-S ) during the treatment year .