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Decline in hospitalization risk and health care cost after initiation of depot antipsychotics in the treatment of schizophrenia

Authors Peng X, Ascher-Svanum H, Faries D, Conley R, Schuh K

Published 11 January 2011 Volume 2011:3 Pages 9—14

DOI https://doi.org/10.2147/CEOR.S16061

Review by Single-blind

Peer reviewer comments 3

Xiaomei Peng, Haya Ascher-Svanum, Douglas Faries, Robert R Conley, Kory J Schuh
Eli Lilly and Company, Indianapolis, IN, USA

Purpose: To assess change in hospitalization and cost of care from 6 months pre- to 6 months post-initiation on any depot antipsychotic among schizophrenia patients.
Patients and methods: Using a large United States commercial claims and encounters database, patients younger than 65 years diagnosed with schizophrenia were identified. Patients initiated on a depot antipsychotic were studied in a mirror-image design to assess change in hospitalization rates, mean duration hospitalized, and hospitalization cost. McNemar’s test and paired t-tests compared the proportions of patients hospitalized and the mean duration. Paired t-test and bootstrapping methods compared costs.
Results: In these patients (n = 147), psychiatric hospitalizations declined from 49.7% pre-initiation to 22.4% post-initiation (P < 0.001), and the mean hospitalized duration for psychiatric purposes numerically declined from 7.3 to 4.7 days (P = 0.05). Total health care costs declined from $11,111 to $7884 (P < 0.05) driven by reduction in costs for psychiatric hospitalizations from $5384 to $2538 (P < 0.05).
Conclusion: Initiation of depot antipsychotic therapy appeared to be associated with a decline in hospitalization rates and costs. Current findings suggest that treatment with depot antipsychotics may be a cost-effective option for a subgroup of patients with schizophrenia who are at high risk of nonadherence with their oral antipsychotic medication regimen.

Keywords: mirror-image, claims database, treatment outcomes, depot antipsychotics

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