Mean reduction in PANSS-EC score 2 hours after initial injection

Drug and doseMean PANSS-EC reductions 2 hours after first injection (standard deviation in parenthesis)
* placebo < olanzapine < haloperidol (p<0.05)
** placebo < olanzapine and haloperidol (p<0.05)
Placebo (n=45)2.9 (4.7)
2.5mg olanzapine (n=48)5.5 (4.6)*
5.0mg olanzapine (n=45)8.1 (5.3)**
7.5mg olanzapine (n=46)8.7 (5.0)**
10mg olanzapine (n=46)9.4 (4.9)**
7.5mg haloperidol (n=40)7.5 (5.9)