Table 3.

Results of Kruskal-Wallis H tests

Dependent variable	n	Mean rank	df	X²	P value	E²
CO hours, suicidal ideation			2	2.54	0.280	0.00
TAU	376	604.32
DBT Group 1	425	590.86
DBT Group 2	393	598.16
CO hours, self-injury			2	9.80	0.007*	0.01
TAU	376	608.92
DBT Group 1	425	591.98
DBT Group 2	393	592.54
CO hours, aggression			2	1.63	0.444	0.00
TAU	376	602.00
DBT Group 1	425	594.26
DBT Group 2	393	596.70
Incident, suicide attempts			2	7.64	0.022*	0.01
TAU	376	603.12
DBT Group 1	425	592.00
DBT Group 2	393	598.07
Incident, self-injury			2	54.87	<0.001†	0.05
TAU	376	582.15
DBT Group 1	425	563.97
DBT Group 2	393	648.45
Incident, aggression patient to patient			2	0.63	0.732	0.00
TAU	376	599.63
DBT Group 1	425	594.48
DBT Group 2	393	598.73
Incident, aggression patient to staff			2	0.57	0.752	0.00
TAU	376	596.94
DBT Group 1	425	596.02
DBT Group 2	393	599.64
Restraints			2	7.07	0.029*	0.01
TAU	376	609.50
DBT Group 1	425	587.19
DBT Group 2	393	597.16
Seclusions			2	2.81	0.246	0.00
TAU	376	601.52
DBT Group 1	425	596.23
DBT Group 2	393	595.03
Days hospitalised			2	33.20	<0.001†	0.03
TAU	376	600.65
DBT Group 1	425	529.54
DBT Group 2	393	667.99
Readmissions			2	4.10	0.129	0.00
TAU	376	610.32
DBT Group 1	425	591.88
DBT Group 2	393	591.31

*p<0.05.

†p<0.001.

CO, constant observation; DBT, dialectical behaviour therapy; TAU, treatment as usual.