Table 4.

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.