In a multinational, double-blind, comparative study of schizophrenia, schizoaffective, and related disorders which included 1,481 patients with varying degrees of associated depressive symptoms (baseline mean of 16.6 on the Montgomery-Asberg Depression Rating Scale), a prospective secondary analysis of baseline to endpoint mood score change demonstrated a statistically significant improvement (p= 0.001) favouring olanzapine (-6.0) versus haloperidol (-3.1).
Selle uuringu prospektiivne sekundaarne analüüs, mis hindas meeleolu punktisumma muutust ravi algusest kuni lõpuni, näitas olansapiini (- 6, 0) statistiliselt olulist paremust (p=0, 001) haloperidooliga (- 3, 1) võrreldes.