Interventional differences among Huntington's disease patients by disease progression in commercial and medicaid populations

The impact of diagnosing provider type on longitudinal care for patients with newly diagnosed Huntington's disease

AIMS

This study evaluated the association between provider types for patients with newly diagnosed Huntington's disease (HD) and healthcare resource utilization (HCRU), costs, and treatment patterns.

MATERIALS AND METHODS

This retrospective analysis used MarketScan databases (1 January 2017-31 December 2021) to identify provider types who diagnosed and managed US adult patients with HD. Patients with continuous enrollment 6 months pre- and 12 months post-diagnosis were included. Outcomes evaluated over 12 months post-diagnosis included hospitalizations, outpatient visits, antipsychotic or vesicular monoamine transporter 2 (VMAT2) inhibitor use, and total healthcare costs.

RESULTS

Three hundred and forty eligible patients had a mean age at diagnosis of 49 years. 56.5% were female; 71.5% had a Charlson Comorbidity Index of 0. Patients were diagnosed by neurologists (48.5%), primary care providers (PCPs) (35.6%), psychiatrists (3.5%), or other providers (12.4%). Patients diagnosed by PCPs or neurologists received significantly more follow-ups by the same diagnosing provider type (p < 0.05). All-cause and HD-related outpatient visits at 12-month follow-up had more patients diagnosed by PCPs (23.9, 5.1) than neurologists (18.0, 2.4), psychiatrists (16.7, 1.67), or others (15.3, 2.4). HD-related mean costs totaled $2,489 ($1,179 inpatient and $1,310 outpatient). Patients diagnosed by neurologists had significantly lower HD-related total non-medication costs vs. those diagnosed by PCPs (-$2,256; p < 0.05). Among patients diagnosed by neurologists vs. PCPs, similar proportions received antipsychotics within the first year (55 vs. 52%, respectively); more patients managed by neurologists received VMAT2 inhibitors (12 vs. 7%, respectively).

LIMITATIONS

Our study includes limitations inherent to retrospective claims studies.

CONCLUSIONS

Patients with HD are most often diagnosed by neurologists or PCPs; the same diagnosing provider type typically manages follow-up. Patients diagnosed by neurologists had significantly fewer HD-related outpatient visits, lower HD-related non-drug costs, and more frequently received VMAT2 inhibitors vs. those diagnosed by PCPs. Our findings show an integrated care team may provide evidence-based, personalized care for patients with HD.

Healthcare utilization and direct medical costs of Huntington's disease among Medicaid beneficiaries in the United States

AIMS

To provide more recent estimates of healthcare utilization and costs in Huntington's disease (HD) in the Medicaid population.

MATERIALS AND METHODS

This retrospective analysis used administrative claims data for HD beneficiaries (≥1 HD claim; ICD-9-CM 333.4) from Medicaid Analytic eXtract data files from 01/01/2010-12/31/2014. The date of the first HD claim during the identification period (01/01/2011-12/31/13) was assigned as the index date. If a beneficiary had multiple HD claims during the identification period, one was randomly chosen as the index date. Beneficiaries were required to be continuously enrolled in fee-for-service plans during the one-year pre-index and post-index periods. Medicaid beneficiaries without HD were drawn from a 100% random sample and matched (3:1) to those with HD. Beneficiaries were classified by disease stage (early/middle/late). All-cause and HD-related (any utilization related to HD diagnosis or symptoms associated with HD) healthcare utilization and costs were reported.

RESULTS

A total of 1,785 beneficiaries without HD were matched to 595 beneficiaries with HD (139 early-, 78 middle-, and 378 late-stage). The mean (SD) annual total costs were higher for beneficiaries with HD than beneficiaries without HD ($73,087 [$75,140] vs. $26,834 [$47,659], p < 0.001) and driven by inpatient costs ($45,190 [$48,185] vs. $13,808 [$39,596], p < 0.001). Total healthcare costs were highest among beneficiaries with late-stage HD (mean [SD] cost: $22,797 [$31,683] for early-stage HD vs. $55,294 [$129,290] for middle-stage HD vs. $95,251 [$60,197] for late-stage HD; p < 0.001).

LIMITATIONS

Administrative claims are intended for billing purposes and subject to coding errors. This study did not address functional status, which may provide further insight to late-stage and end-of-life burden of HD, and indirect costs.

CONCLUSIONS

Medicaid beneficiaries with HD have higher acute healthcare utilization and costs compared to beneficiaries without HD, which tend to increase with disease progression, indicating that HD beneficiaries at later disease stages have greater burden.

Health care resource utilization and costs among individuals with vs without Huntington disease in a US population

BACKGROUND: Quantifying the extent of health care resource utilization (HCRU) and costs associated with Huntington disease (HD) is vital for providers, decisionmakers, and payers to understand unmet treatment needs and to ensure limited resources can be used to benefit the maximum number of people with HD. OBJECTIVE: To quantify HCRU and costs for people with HD, overall and by disease stage, and compare these with non-HD controls. METHODS: This was a retrospective cohort study using administrative claims data from the IBM MarketScan Commercial, Multi-State Medicaid, and Medicare Supplemental Databases from January 1, 2009, to December 31, 2018. People with an HD claim between January 1, 2010, and December 31, 2017, were selected for this analysis and matched with non-HD controls for comparison. The HD cohort and the non-HD controls were exact matched on their follow-up duration and propensity score matched 1:4 to create the final analytical cohort. Index date was the first HD diagnosis for the HD cohort (proxy index date assigned to controls), and all individuals were required to have continuous enrollment for 12 or more months pre-index (baseline) and 3 or more months post-index. Proportions of all-cause HCRU (ie, outpatient visits, inpatient visits, emergency department visits, pharmacy fills, radiology visits, and physical/occupational therapy visits) in the 6-months post-index and HCRU counts and costs per patient per month (PPPM) over the entire follow-up were calculated for each cohort. RESULTS: A total of 2,473 individuals with HD and 9,522 matched non-HD controls were identified. HCRU in 6 months post-index was significantly greater in people with HD compared with non-HD controls for all health care service categories; P < 0.0001. The mean number of HCRU PPPM for all measured healthcare services was significantly higher in people with HD compared with non-HD controls (P < 0.001). Mean total costs (2018 USD PPPM) for the HD cohort ($2,260 [SD = $4,682]) were twice the total costs in the non-HD cohort ($1,056 [SD = $3,078]) (P < 0.0001) and were highest across all disease stages. CONCLUSIONS: This study provides current comprehensive HCRU and cost estimates in individuals with HD relative to those without the disease, thus demonstrating the high economic burden imposed by HD. DISCLOSURES: Dr Ta: Employment with Genentech (at time of study) and stock options with Roche; Dr To: Employment and stock options/dividends with Genentech; Dr Patel: Employment and stock options with Roche/Genentech; Dr Fuller: Employment with CHDI Management/CHDI Foundation; Mr Surinach: Employment with Genesis Research (which receives consulting fees from Genentech/Roche); Dr Abbass: Employment and stock options with Genentech; Dr Exuzides: Employment and stock options with Roche/Genentech; and Ms Luo: Employment with CHDI Management/CHDI Foundation. This study was funded by Genentech Inc. The authors thank Greg Rowe of Chrysalis Medical Communications for providing medical writing support, which was funded by F. Hoffmann-La Roche Ltd, in accordance with Good Publication Practice (GPP3) guidelines (http://www.ismpp.org/gpp3).

Healthcare resource utilization and costs in individuals with Huntington's disease by disease stage in a US population

AIMS

To quantify healthcare resource utilization (HRU) and costs by disease stage in individuals with Huntington's disease (HD) in a US population.

MATERIALS AND METHODS

This retrospective cohort study used administrative claims data from the IBM MarketScan Commercial, Multi-State Medicaid, and Medicare Supplemental Databases between 1 January 2009 and 31 December 2018. Individuals with an HD claim between 1 January 2010 and 31 December 2017 were selected. Index date was the date of first HD diagnosis. Individuals were required to have continuous enrollment for ≥ 12 months pre-index, 3 months post-index, and have no pre-index HD claims. All-cause HRU and costs per patient per month (PPPM) (overall and stratified by disease stage) were assessed for individuals with HD.

RESULTS

A total of 2,669 individuals with HD were identified. Of these, 1,432 (53.7%), 689 (25.8%), and 548 (20.5%) had early-, middle-, and late-stage HD at baseline, respectively. Mean HRU PPPM by post-index HD stage increased with disease stage for outpatient visits, pharmacy claims, and HD-related pharmacy claims (p < 0.05 for all). Mean inpatient visits and emergency room visits PPPM were highest in individuals with middle-stage HD (p <0.05 for all). Mean total all-cause healthcare cost PPPM for individuals with HD was $2,889, and it was significantly higher in middle-stage individuals, at $7,988, compared with early- and late-stage individuals, at $3,726 and $5,125, respectively; p <0.0001.

LIMITATIONS

In the absence of disease staging information in administrative claims data, staging was based on the presence of clinical markers in claims. Our evaluations didn't include the indirect costs of HD, which may be substantial as HD typically affects people at their peak earning potential.

CONCLUSIONS

HRU and costs of care are high among individuals with HD, particularly among those with middle- and late-stage disease. This indicates that the disease burden in HD increases with disease stage, highlighting the need for interventions that can slow or prevent disease progression.

Neuropsychiatric comorbidities in Huntington's and Parkinson's Disease: A United States claims database analysis

OBJECTIVE

Huntington's disease is a rare, genetic, neurodegenerative disease characterized by a triad of cognitive, behavioral, and motor symptoms. The condition gradually results in increasing disability, loss of independence, and ultimately death. Our objective was to use United States claims data (which offer valuable insight into the natural history of disease) to compare the prevalent comorbidities of people with Huntington's disease against matched controls with Parkinson's disease or with no major neurodegenerative diseases (general population controls). We also assess medication use in people with Huntington's disease.

METHODS

This was a retrospective, observational study using data from the IBM MarketScan® Databases. Cases and controls were matched 1:1, and comorbidities were analyzed in each group during 2017. Medications were also assessed in the Huntington's disease cohort. Eligible cases had ≥ 2 diagnostic codes for Huntington's disease; controls had ≥ 2 codes for Parkinson's disease (with no record of Huntington's disease), or, for general population controls, no record of Huntington's disease, Parkinson's disease, amyotrophic lateral sclerosis, or dementia.

RESULTS

A total of 587 matched individuals were assessed in each cohort. Depression and anxiety were more common in Huntington's disease versus Parkinson's disease (odds ratios: 1.51 and 1.16, respectively). Other conditions more common in Huntington's disease included dementia, communication/speech problems, dysphagia, and falls. The use of antidepressant (59.9%) and antipsychotic (39.5%) medications was frequent among Huntington's disease cases.

INTERPRETATION

These data highlight the prevalence of psychiatric, cognitive, communication, swallowing, and mobility problems in people with Huntington's disease, underscoring the need for holistic expert care of these individuals.

Healthcare utilization and cost burden of Huntington's disease among Medicare beneficiaries in the United States

AIMS

To examine healthcare utilization and costs in a US Medicare population diagnosed with Huntington's disease (HD).

METHODS

This was a retrospective matched cohort study using Medicare fee-for-service (FFS) claims data using 2013-2017 Research Identifiable Files. Medicare beneficiaries diagnosed with HD based on the presence of at least one medical claim with an International Classification of Diseases, Ninth or Tenth Revision, Clinical Modification (ICD-9/10-CM) diagnosis code for HD (ICD-9-CM: 333.4; ICD-10-CM: G10) during the identification period (2014-2016). Beneficiaries without HD were drawn from a 5% random sample of Medicare beneficiaries and 1:1 matched to those with HD for comparison. All-cause and HD-related (any utilization related to HD diagnosis or symptoms associated with HD) healthcare utilization and costs were reported.

RESULTS

We identified 3,688 matched pairs of beneficiaries with and without HD. Of those with HD, 1,922 (52.1%) were late-stage, 916 (24.8%) were middle-stage, and 850 (23.1%) were early-stage. Mean [SD] annual total healthcare costs were higher for HD beneficiaries than beneficiaries without HD ($41,631 [57,393] vs. $17,222 [31,218], p < .001) and were primarily driven by outpatient pharmacy costs ($19,182 [45,469] vs. $4,318 [11,553], p < .001). In the stratified analysis, total healthcare costs were highest among beneficiaries with late-stage HD (mean [SD] cost: $20,475 [$41,122] for early-stage vs. $29,733 [$44,977] for middle-stage vs. $56,657 [$64,185] for late-stage; p < .001).

LIMITATIONS

Results are not generalizable to beneficiaries enrolled in other non-FFS Medicare plans. Administrative claims are intended for billing purposes, not research, and may not capture all symptoms, comorbidities, and other adverse events.

CONCLUSIONS

This original, comprehensive analysis of healthcare utilization and economic burden among Medicare beneficiaries with HD found that healthcare needs and associated costs are substantially higher among Medicare beneficiaries who are diagnosed with HD compared to beneficiaries without HD.

Epidemiology and health care utilization of patients suffering from Huntington's disease in Germany: real world evidence based on German claims data

BACKGROUND

Huntington's disease (HD) is a rare, genetic, neurodegenerative and ultimately fatal disease with no cure or progression-delaying treatment currently available. HD is characterized by a triad of cognitive, behavioural and motor symptoms. Evidence on epidemiology and management of HD is limited, especially for Germany. This study aims to estimate the incidence and prevalence of HD and analyze the current routine care based on German claims data.

METHODS

The source of data was a sample of the Institute for Applied Health Research Berlin (InGef) Research Database, comprising data of approximately four million insured persons from approximately 70 German statutory health insurances. The study was conducted in a retrospective cross-sectional design using 2015 and 2016 as a two-year observation period. At least two outpatient or inpatient ICD-10 codes for HD (ICD-10: G10) during the study period were required for case identification. Patients were considered incident if no HD diagnoses in the 4 years prior to the year of case identification were documented. Information on outpatient drug dispensations, medical aids and remedies were considered to describe the current treatment situation of HD patients.

RESULTS

A 2-year incidence of 1.8 per 100,000 persons (95%-Confidence interval (CI): 1.4-2.4) and a 2-year period prevalence of 9.3 per 100,000 persons (95%-CI: 8.3-10.4) was observed. The prevalence of HD increased with advancing age, peaking at 60-69 years (16.8 per 100,000 persons; 95%-CI: 13.4-21.0) and decreasing afterwards. The most frequently observed comorbidities and disease-associated symptoms in HD patients were depression (42.9%), dementia (37.7%), urinary incontinence (32.5%), extrapyramidal and movement disorders (30.5%), dysphagia (28.6%) and disorders of the lipoprotein metabolism (28.2%). The most common medications in HD patients were antipsychotics (66.9%), followed by antidepressants (45.1%). Anticonvulsants (16.6%), opioids (14.6%) and hypnotics (9.7%) were observed less frequently. Physical therapy was the most often used medical aid in HD patients (46.4%). Nursing services and speech therapy were used by 27.9 and 22.7% of HD patients, respectively, whereas use of psychotherapy was rare (3.2%).

CONCLUSIONS

Based on a representative sample, this study provides new insights into the epidemiology and routine care of HD patients in Germany, and thus, may serve as a starting point for further research.

Investigational agents for the management of Huntington's disease

INTRODUCTION

An inherited, chronic progressive, neurodegenerative disorder is Huntington's disease, characterized by motor, cognitive, and psychiatric symptoms. Predictive genetic testing allows earlier diagnosis and identification of gene carriers for Huntington's disease. These individuals are ideal candidates for testing of therapeutic interventions for disease modification. Areas covered: According to queries in Pubmed, Embase and clinical register databases, research and clinical studies emerge on symptomatic and neuroprotective therapies in Huntington's disease. This review discusses novel agents for symptomatic therapy and disease modification. They are currently in phase I and II of drug development Expert opinion: There are promising, safe and well tolerated compounds for amelioration of motor and neuropsychiatric symptoms, but their efficacy still needs to be proven in clinical trials. Deterioration of mutant huntingtin expression, antiapoptotic or cell death inhibition as disease modifying concepts was efficacious in models of Huntington's disease. However, the risk for clinical trial failures is high not only due to ineffectiveness of the tested agent. Negative study outcomes may also result from design misconceptions, underestimation of the heterogeneity of Huntington's disease, too short study durations and too small study cohorts.