The review found no eligible studies for this question.
Comparison 1: Individual CBT‐based psychotherapy showed no clear difference in repetition of SH by post‐intervention compared with TAU or other comparator (low certainty).
Comparison 2: DBT‐A leads to lower repetition of SH at post‐intervention compared with TAU or another comparator (high certainty).
It is very uncertain whether comparison 3: MBT‐A changes repetition of SH at post‐intervention compared with TAU or another comparator (very low certainty).
Comparison 7: Family therapy showed no clear difference in repetition of SH at post‐intervention compared with placebo (moderate certainty).
Comparison 1.1: Individual‐based CBT‐based psychotherapy showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (low certainty).
Comparison 4: Emotion‐regulation psychotherapy probably leads to lower repetition of SH at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 5: Psychodynamic psychotherapy showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 6: Case management showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (low 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).
Comparison 9.1: Emergency cards showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (low certainty).
Comparison 9.2: Coping cards showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (moderate certainty).
It is very uncertain whether comparison 9.4: Postcards changes repetition of SH at post‐intervention compared with TAU or another comparator (very low certainty).
Comparison 9.5: Telephone contact showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (low certainty).
Comparison 9.6: Telephone contact, emergency cards, and letters showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 1.2: Group‐based CBT‐based psychotherapy showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 9.7: Telephone‐based psychotherapy showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (low certainty).
It is very uncertain whether comparison 10: Provision of information and support changes repetition of SH at post‐intervention compared with TAU or another comparator (very low certainty).
Comparison 12.5: General hospital management showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (moderate certainty).
Comparison 12.8: Long‐term therapy showed no clear difference in repetition of SH at post‐intervention compared with TAU or another comparator (low certainty).