1.23. Analysis.

Comparison 1 VALPROATE + ANTIPSYCHOTICS versus ANTIPSYCHOTICS + PLACEBO or ANTIPSYCHOTICS alone, Outcome 23 Use of additional medication: 1. Mean dose of antiparkinson medication (skewed data).

Use of additional medication: 1. Mean dose of antiparkinson medication (skewed data)
Study	Interventions	Mean score	SD	N
Dose 1998	Valproate ‐ mean biperiden dose ‐ high = poor	3.0 mg/d	2.4	14
Dose 1998	Placebo ‐ mean biperiden dose ‐ high = poor	2.4 mg/d	1.8	15
Hesslinger 1999	Valproate ‐ mean biperiden dose ‐ high = poor	3.6 mg/	3.3	9
Hesslinger 1999	Placebo ‐ mean biperiden dose ‐ high = poor	2.9 mg/d	3	9