Another two trials compared clozapine with olanzapine. In a study by Shaw et al8 there were moderate to large differential treatment effects in favor of clozapine; however, these reached significance only for alleviation of negative symptoms from an antipsychotic-free baseline, as measured by the Schedule for the Assessment of Negative Symptoms. They observed an increased proportion of treatment-related adverse events and symptoms in the clozapine group. Clozapine was associated with significantly more hypertension and supine tachycardia and a near-significant increase in sustained enuresis. Two patients on clozapine and one patient on olanzapine had a transient drop in their absolute neutrophil count below 1,500 cells/μL. Kumra et al9 compared clozapine with “high-dose” olanzapine (up to 30 mg/day). The primary efficacy measure was improvement, defined as a decrease of 30% or more in the total Brief Psychiatric Rating Scale (BPRS) score relative to baseline and a Clinical Global Impression Scale-Improvement rating of 1 or 2. Significantly, more clozapine-treated adolescents met the response criteria (66%) than did olanzapine-treated patients (33%). Five patients experienced a serious adverse event that led to premature termination of treatment, including one case of neutropenia that was surprisingly not in a clozapine-treated patient, but instead was in an olanzapine-treated patient.