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Article Publish Status: FREE
Abstract Title:

Benzodiazepine use and risk of mortality among patients with schizophrenia: a retrospective longitudinal study.

Abstract Source:

J Clin Psychiatry. 2016 May ;77(5):661-7. PMID: 27249075

Abstract Author(s):

Cynthia A Fontanella, John V Campo, Gary S Phillips, Danielle L Hiance-Steelesmith, Helen Anne Sweeney, Kwok Tam, Douglas Lehrer, Robert Klein, Mark Hurst

Article Affiliation:

Cynthia A Fontanella

Abstract:

OBJECTIVE: This study examined the association between benzodiazepine use alone or in combination with antipsychotics and risk of mortality in patients with schizophrenia.

METHODS: A retrospective longitudinal analysis was performed using Medicaid claims data merged with death certificate data for 18,953 patients (aged 18-58 years) with ICD-9-diagnosed schizophrenia followed from July 1, 2006, to December 31, 2013. Cox proportional hazard analyses were used to estimate the risk of all-cause mortality associated with benzodiazepine use; adjustment was made for a wide array of fixed and time-varying confounders, including demographics, psychiatric and medical comorbidities, and other psychotropic medications.

RESULTS: Of the 18,953 patients diagnosed with schizophrenia, 13,741 (72.5%) were not prescribed a benzodiazepine, 3,476 (18.3%) were prescribed benzodiazepines in the absence of antipsychotic medication, and 1,736 (9.2%) were prescribed benzodiazepines in combination with antipsychotics. Controlling for a wide array of demographic and clinical variables, the hazard of mortality was 208% higher for patients prescribed benzodiazepines without an antipsychotic (HR = 3.08; 95% CI, 2.63-3.61; P<.001) and 48% higher for patients prescribed benzodiazepines in combination with antipsychotics (HR = 1.48; 95% CI, 1.15-1.91; P = .002). Benzodiazepine-prescribed patients were at greater risk of death by suicide and accidental poisoning as well as from natural causes.

CONCLUSIONS: Benzodiazepine use is associated with increased mortality risk in patients with schizophrenia after adjusting for a wide range of potential confounders. Given unproven efficacy, physicians should exercise caution in prescribing benzodiazepines to schizophrenic patients.

Study Type : Human Study

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