Post hoc results of Mann-Whitney U tests
| Dependent variable | U | Z | P value |
| CO hours, self-injury | |||
| DBT Group 1, DBT Group 2 | 83 432.5 | −0.12 | 0.901 |
| TAU, DBT Group 2 | 71 855.5 | −2.39 | 0.017* |
| Incident, suicide attempts | |||
| DBT Group 1, DBT Group 2 | 82 662.5 | −2.08 | 0.037* |
| TAU, DBT Group 2 | 73 258.5 | −0.99 | 0.323 |
| Incident, self-injury | |||
| DBT Group 1, DBT Group 2 | 71724.5 | -6.70 | <0.001† |
| TAU, DBT Group 2 | 65649.0 | -4.75 | <0.001† |
| Restraints | |||
| DBT Group 1, DBT Group 2 | 82 109.0 | −1.37 | 0.171 |
| TAU, DBT Group 2 | 72 347.5 | −1.31 | 0.189 |
| Days hospitalised | |||
| DBT Group 1, DBT Group 2 | 83 438.5 | −0.06 | 0.956 |
| TAU, DBT Group 2 | 71 524.5 | −1.72 | 0.086 |
*P < 0.05
†P < 0.001
CO, constant observation; DBT, dialectical behaviour therapy; TAU, treatment as usual.