Comparison 2.4: DBT prolonged exposure protocol showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 3: MBT leads to lower repetition of SH at post‐intervention compared with TAU or another comparator (high certainty).
Comparison 1: CBT‐based psychotherapy showed no clear difference in repetition of SH at post‐intervention compared with treatment (low certainty).
Comparison 3: Case management showed no clear difference in repetition of SH at post‐intervention compared with treatment (moderate certainty).
Comparison 2.2: DBT group‐based skills training showed no clear difference in repetition of NSSI at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 2.3: DBT individual therapy showed no clear difference in repetition of NSSI at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 2.2: DBT group‐based skills training showed no clear difference in repetition of attempted suicide at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 2.3: DBT individual therapy showed no clear difference in repetition of attempted suicide at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 7: Structured GP follow‐up showed no clear difference in repetition of SH at post‐intervention (hospital records) compared with TAU or another comparator (low certainty).