Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Symptom severity
Systematic review	794 people 2 RCTs in this analysis	Mean difference in average endpoint Positive and Negative Syndrome Scale total score with olanzapine (10–20 mg/day) with aripiprazole (15–30 mg/day) Absolute results not reported	Mean difference –4.96 95% CI –8.06 to –1.85	Effect size not calculated	olanzapine