. 2012 Sep-Oct;5(6):379–386.

Table 5.

Two-Part Model for Adjusted Inpatient/Emergency Department Costs

Medication-specific medical costs	Mean adjusted costs, $ (inpatient/emergency department)	Difference in costs, $	95% Confidence interval
Medication-specific medical costs	Mean adjusted costs, $ (inpatient/emergency department)	Difference in costs, $	Lower costs, $	Upper costs, $
All-cause costs
Aripiprazole	295	0	0	0
Olanzapine	377	82	−25	189
Quetiapine	421^a	126	37	214
Risperidone	388^a	94	1	190
Ziprasidone	538^a	243	115	376
Mental health–related costs
Aripiprazole	215	0	0	0
Olanzapine	247	31	−43	107
Quetiapine	283	67	−3	138
Risperidone	264	49	−26	115
Ziprasidone	368^a	153	41	259

P <.05 versus aripiprazole.

Costs are reported per treated patient per month in 2008 US dollars. Estimates are reported after controlling for age, sex, year of index prescription, Charlson comorbidity index, diabetes, hyperlipidemia, glucose and lipid testing, baseline hospitalization rate, and use of mood stabilizers.