Real-World Direct Health Care Costs Associated with Psychotropic Polypharmacy Among Adults with Common Cancer Types in the United States

BACKGROUND

Psychotropic polypharmacy is not uncommon among cancer patients and may contribute to the increased direct health care cost burden in this population.

OBJECTIVE

To estimate average direct health care costs in the year following cancer diagnosis among cancer patients receiving psychotropic polypharmacy compared with those without psychotropic polypharmacy, using a multivariable analysis framework.

METHODS

A retrospective cross-sectional study was conducted among patients aged 18 years and older diagnosed with the most commonly occurring cancers (breast, prostate, lung, and colorectal) in the United States during 2011-2012 using the deidentified Optum Clinformatics Data Mart commercial claims database. Psychotropic polypharmacy was defined as concurrent use of 2 or more psychotropic medications for at least 90 days. Direct health care costs in the year following cancer diagnosis were estimated as total medical payments made by the health plans and were derived from claims files. A generalized linear regression model with log-link function and gamma distribution was used to model average direct health care costs, controlling for baseline patient demographic and clinical covariates.

RESULTS

Average annual direct health care costs for cancer patients with psychotropic polypharmacy ($53,497; SD $72,590) were higher than those without psychotropic polypharmacy ($38,255; SD $59,844), with an unadjusted average cost difference of $15,242 (P < 0.0001). In the adjusted regression model, the average difference in costs shrunk to $5,888 but remained notable. When examined by type of cancer, average direct health care costs for all cancer patients with psychotropic polypharmacy were significantly higher than those for patients without psychotropic polypharmacy, except for colorectal cancer patients.

CONCLUSIONS

Overall health care costs were higher among cancer patients with psychotropic polypharmacy compared with those without psychotropic polypharmacy. Our findings support the need for future research to better understand the benefits and risks of psychotropic polypharmacy, given its potential to cause adverse health outcomes and avoidable health care utilization and costs for this vulnerable patient population.

DISCLOSURES

This study was funded by the American Association of Colleges of Pharmacy (AACP) New Investigator Award mechanism, which was received by Vyas. Aroke was partially supported by the AACP grant for conducting data analysis of the study. Kogut is partially supported by Institutional Development Award Number U54GM115677 from the National Institute of General Medical Sciences of the National Institutes of Health, which funds Advance Clinical and Translational Research (Advance-CTR). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health and the AACP. The authors report no conflicts of interest. An abstract of this study was presented as a poster at the American Association of Colleges of Pharmacy Annual Meeting on July 22, 2018, in Boston, MA.

Physician Care Coordination and the Use of Psychotropic Polypharmacy in the Management of Pediatric Mental Disorders

BACKGROUND

Psychotropic polypharmacy is a concern in the management of pediatric mental disorders due to the lack of pediatric data to support the practice. Although seeing multiple providers has been identified as an important predictor of polypharmacy, no study has yet assessed the effect of care coordination between providers on receipt of psychotropic polypharmacy.

OBJECTIVE

To examine the association between the intensity of care coordination within a patient's care team and the likelihood of the patient receiving multiclass psychotropic polypharmacy.

METHODS

A retrospective study was conducted using the 2013-2015 administrative claims data from a Medicaid managed care organization (Texas Children's Health Plan). Children and adolescents aged 18 years or younger with a diagnosis of a mental/behavioral disorder and receipt of psychotropic prescriptions from multiple prescribers were included in the study. Psychotropic polypharmacy was defined as the receipt of 2 or more psychotropic medications from different drug classes concurrently for 60 days or more. Care coordination was measured using social network analysis (SNA), a new technique included in the Agency for Healthcare Research and Quality Care Coordination Measures Atlas. Care density, an SNA surrogate for care coordination, was calculated as the ratio of the sum of patients shared by physician pairs within a patient's care team to the total number of physician pairs. The Andersen behavioral model was used to guide multivariate logistic regression analyses conducted to assess the association between care density and the likelihood of patients receiving psychotropic polypharmacy after controlling for predisposing and need factors.

RESULTS

A total of 24,147 children and adolescents diagnosed with a mental/behavioral disorder were identified. About 34.0% (n = 8,092) of these individuals received psychotropic medications from multiple prescribers who were either primary care physicians (PCPs) or specialists. Logistic regression analysis showed a significant association between care density and the use of psychotropic polypharmacy. However, the direction of this relationship varied depending on the composition of the patient's care team. Among patients with only PCPs involved in their care team, patients in the higher care-density group were 28% less likely to receive psychotropic polypharmacy (OR = 0.72; 95% CI = 0.62-0.96) than those in the lower care-density group. In contrast, among patients who had both PCPs and specialists involved in their care team, those in the higher care-density group were 2 times more likely to experience psychotropic polypharmacy (OR = 2.01; 95% CI = 1.68-2.40). Care density was not significantly associated with the receipt of psychotropic polypharmacy in the specialist-only group.

CONCLUSIONS

This study found significant associations between care density and prescription of psychotropic polypharmacy. This relationship varied depending on the patient's diagnosis, disease complexity, and composition of the patient's care team.

DISCLOSURES

No outside funding supported this study. The authors do not have any financial relationships or potential conflicts of interest relevant to this article to disclose. The abstract for part of this study, titled "Association Between Physician Care Coordination and the Use of Psychotropic Polypharmacy in the Management of Pediatric Mental Disorders," was selected as a silver medal abstract and was presented at the AMCP Managed Care & Specialty Pharmacy Annual Meeting 2017; March 27-30, 2017; Denver, CO.

Potential drug-drug interaction in Mexican patients with schizophrenia

OBJECTIVE

The aim of this study was to observe potential drug-drug interactions in the medication of Mexican schizophrenic patients.

METHODS

We performed a retrospective and cross-sectional study that was carried out in a psychiatric clinic. Only the prescriptions of patients with schizophrenia whose diagnoses were based on the DSM-IV instrument were included in this study. The Drug Interactions Checker software ( http://www.drugs.com/drug_interactions.html ) was used in this study to analyse potential drug-drug interactions.

RESULTS

In total, 86 of 126 patients were at risk of potential drug-drug interactions. Haloperidol and biperiden was the most common drug pair of 232 pairs evaluated. In our study, 13.8% of drug-drug interaction showed a major level of severity, whereas in 83.2%, the interaction was moderate. Finally, central nervous system (CNS) depression and anticholinergic effect were the main possible effects of drug-drug interaction.

CONCLUSIONS

Our results revealed a high number of patients with schizophrenia receiving two or more drugs. The potential drug-drug interactions observed in the Mexican population are consistent with the concomitant use of antipsychotics, benzodiazepines, and antidepressants prescribed in schizophrenia that could cause central nervous system (CNS) depression and anticholinergic effect. Drug-drug interaction must be considered when the patient with schizophrenia is medicated.