Mental state: average change score (Positive and Negative Syndrome Scale (PANSS), positive=improvement, data skewed)
Study	Intervention	Mean	SD	N
general psychopathology
Krakowski 2006	Haloperidol	0.64	8.2	36
Krakowski 2006	Clozapine	1.43		37
negative symptoms
Krakowski 2006	Haloperidol	0.44	4.6	36
Krakowski 2006	Clozapine	‐0.56	4.9	37
positive symptoms
Krakowski 2006	Haloperidol	‐0.5	5.3	36
Krakowski 2006	Clozapine	1.54	5.0	37
total
Krakowski 2006	Haloperidol	0.58	1.52	36
Krakowski 2006	Clozapine	2.39	14.2	37