Resource utilization, work productivity and costs in patients with hidradenitis suppurativa: a cost-of-illness study

Burden of Hidradenitis Suppurativa: A Systematic Literature Review of Patient Reported Outcomes

INTRODUCTION

Hidradenitis suppurativa (HS) has a profound negative impact on patients' health-related quality of life (HRQoL). Here we summarize the evidence on HRQoL and Patient Reported Outcomes (PROs) in patients with HS in real-world settings by conducting a systematic literature review (SLR) of observational studies.

METHODS

Data sources included MEDLINE, Embase & PsycINFO between January 1, 2010 and August 29, 2021, and conference proceedings between 2019 and 2021. Identified abstracts were reviewed and screened independently by two reviewers. Eligibility criteria included patients with HS of any severity, sample size ≥ 100, reporting PROs including HRQoL measures. Included studies were critically appraised.

RESULTS

Fifty-eight observational studies matched inclusion criteria. Dermatology Life Quality Index (DLQI) was the most commonly utilized instrument: 57% of included studies reported mean baseline DLQI scores, ranging between 8.4 and 16.9, indicating a very large impact on the patients' HRQoL. Higher scores were reported with increasing disease severity and among female patients. Pain was assessed mostly by an 11-point (0-10) numeric rating scale (NRS) with a mean baseline score ranging from 3.6 to 7.7 indicating moderate to high pain levels. There was a negative impact of HS on patients' psychological well-being, based on PRO scores related to depression and anxiety. A high proportion of sexual dysfunction was reported, with a larger impact on women than men. Work productivity and leisure activity were consistently found to be impaired in patients with HS.

CONCLUSIONS

All included studies reported a negative impact of HS on patients' lives. A diverse set of disease- and non-disease-specific PRO instruments were utilized highlighting the need for more consistent use of HS-specific validated PRO instruments to assess the impact of HS on the different aspects of patients' HRQoL to allow for data to be more meaningfully interpreted and compared in real-world settings. Patients with HS need better disease management approaches that address the observed low quality of life.

A center-based, ambulatory care concept for hidradenitis suppurativa improves patient outcomes and is also cost-effectiveness

BACKGROUND

Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease affecting approximately 1% of the population. The patient journey through the German health care system leads to high disease burden and substantial treatment costs. The EsmAiL study showed that an innovative, interprofessional, multimodal care-concept reduces disease activity and burden of HS compared to standard care. This paper examines the costs of treating HS in Germany and compares them with those of the innovative care concept implemented in EsmAiL.

METHODS

EsmAiL was a two-arm, multicenter, prospective randomized controlled trial including 553 adults with HS. The study was registered in the German Clinical Trials Registry (DRKS00022135). The control group (CG) remained in standard care, whereas the intervention group (IG) was referred to specialized so-called 'acne-inversa-centres (AiZ)' where patients were treated with a structured, interdisciplinary approach. The present paper analyses the treatment costs for a subpopulation based on health insurance cost data from the two largest German health insurers. Quality-Adjusted Life Years (QALY) was assessed based on Dermatology Life Quality Index (DLQI).

RESULTS

Total annual treatment costs per patient were €3,966.07 in standard care (n = 89) and €3,974.37 in the innovative care (n = 93). The costs per additional QALY amounted to €12,698.72 in the IG. Given the conventional and established threshold of €22,600 to €33,900 per QALY, the innovative treatment in AiZ proved to be cost-effective.

CONCLUSION

Treatment costs of HS are substantial and increase with disease severity. The new form of care is cost-effective and is expected to decrease costs in the long run.

Disease Burden and Treatment Patterns Among US Patients with Hidradenitis Suppurativa: A Retrospective Cohort Study

INTRODUCTION

Hidradenitis suppurativa (HS) is a chronic, autoinflammatory skin disease associated with many comorbidities. One biologic (adalimumab) is approved for HS. This study assessed the sociodemographic characteristics, comorbidities, treatment patterns, healthcare resource utilization (HCRU) and associated costs of patients with HS following biologic approval.

METHODS

This non-interventional, retrospective cohort study involved adult (≥ 18 years) and adolescent (12-17 years) patients diagnosed with HS in the United States (US) using Optum's de-identified Clinformatics® Data Mart Database during the period 1 January 2016 to 31 December 2018.

RESULTS

Of 42,843 identified patients, 10,909 met the incident HS patient criteria (10,230 adults, 628 adolescents, 51 patients aged <12 years). Patients were mostly diagnosed by a general practitioner/pediatrician (adults: 41.6%; adolescents: 39.6%) or dermatologist (adults: 22.1%; adolescents: 30.6%). Commonly reported Charlson comorbidities at pre-index in adult patients were diabetes without complications (20.4%), chronic pulmonary disease (16.4%) and diabetes with complications (9.0%), and the most frequent Elixhauser comorbidities were uncomplicated hypertension (38.3%), obesity (22.5%), uncomplicated diabetes (19.0%) and depression (17.4%). The burden of comorbidities generally increased over time after diagnosis in both adults and adolescents. HS-related surgical procedures were uncommon in the 2-years post-index period: an incision and drainage procedure was reported in 7.6% of adults and 6.4% of adolescents. Patients were predominantly treated with both topical and systemic antibiotic treatments (adults: 25.0% and 65.1%, respectively; adolescents: 41.7% and 74.5%, respectively). Biologic prescription was higher in adults than adolescents (3.5% vs. 1.8%). Total healthcare costs for adult and adolescent patients in the 2-years post-index period were US$42,143 and US$16,057, respectively, with outpatient costs accounting for the majority of these costs (US$20,980 and US$8408, respectively).

CONCLUSION

In adult and adolescent patients with HS, comorbidity burden continues to increase after diagnosis. All-cause and HS-specific HCRU and costs are high in adults and adolescents with HS. These findings support the need for a multidisciplinary comprehensive care strategy for patients with HS.

Patient Perspectives of Health System Barriers to Accessing Care for Hidradenitis Suppurativa: A Qualitative Study

Importance

Patient-perceived barriers to hidradenitis suppurativa (HS) care are poorly understood. Understanding health care barriers is a critical first step toward improving care for this population.

Objective

To characterize the health care experiences of people living with HS, including perceived barriers and facilitators to health care access, and to elucidate potential associations among these barriers and facilitators, health care access, and disease activity.

Design, Setting, and Participants

In this qualitative study, an inductive thematic analysis was conducted on 45 in-depth, 60- to 90-minute semistructured interviews of 45 people with HS from diverse sociodemographic backgrounds that took place between March and April 2020. Individuals were eligible if they could speak English, were 18 years or older, and were diagnosed with HS. A diagnosis of HS was confirmed through physician diagnosis or through self-reported, affirmative response to the validated screening question, "Do you experience boils in your armpits or groin that recur at least every six months?"

Main Outcomes and Measures

Interviews were audio recorded and transcribed verbatim. A modified grounded theory approach was used to develop the codebook, which investigators used for inductive thematic analysis.

Results

Among the 45 participants included, the median (IQR) age was 37 (16) years, 33 (73%) were female, and 22 (49%) were White. There were 6 interrelated themes associated with participant-perceived barriers to accessing HS care: (1) bidirectional associations of disease activity and employment, (2) association of employment with health care coverage, (3) association of health care coverage with costs and perceived access to care, (4) association of costs with access to patient-centered care, (5) health care professional attitudes and knowledge influence patient-centered care and perceived access to care and disease activity, and (6) health system characteristics influence patient-centered care and associated costs, perceived access to care, and disease activity.

Conclusions and Relevance

This qualitative study highlights themes that generate a conceptual model for understanding barriers that may act synergistically to limit health care access and influence disease activity. The disease activity of HS may be reduced when cycle elements are optimized. This study also highlights areas for future investigations and potential systems-level changes to improve access to patient-centered HS care.

Hidradenitis-suppurativa-bedingte Kosten, ein Plädoyer für Aufmerksamkeit: eine systematische Literaturübersicht

Die Daten zu Hidradenitis suppurativa (HS)-bedingten Kosten sind begrenzt und inhomogen. Sie sind jedoch erheblich. Wir führten eine systematische Sichtung der Literaturberichte durch, in denen finanzielle Daten über jeden Gesundheitsbereich oder andere Ausgaben dokumentiert wurden, die durch HS und/oder HS-bedingte Auswirkungen auf Beschäftigung, Einkommen und persönliches wirtschaftliche Entwicklung entstanden sind (indirekte Kosten). Dafür wurden drei elektronische Datenbanken durchsucht (MEDLINE, ScienceDirect und die Cochrane Library -letzte Suche: 14. September 2021). Alle Kosten wurden inflationsbereinigt (2022) und in US-Dollar umgerechnet. Es wurden 23 Artikel eingeschlossen (18 Krankheitskostenstudien, 4 Beobachtungsstudien und 1 Fallserie), in denen ökonomische Daten von 77.287 HS-Patienten erfasst wurden. Die durch HS entstandenen durchschnittlichen jährlichen Kosten pro Patient reichten von 258 $ bis 8.078 $. Diese Zahl erhöhte sich bei chirurgischen Eingriffen, Krankheitsprogression, Antibiotika-Versagen und bestimmten Begleitkrankheiten. Der kostspieligste Faktor war die stationäre Versorgung, gefolgt von ambulanter und Notfallversorgung. Signifikante Unterschiede wurden zwischen den USA und den übrigen untersuchten Ländern beobachtet. Im Vergleich zu Psoriasis-Patienten waren Krankenhausaufenthalte bei HS wahrscheinlicher, länger und kostspieliger, während die weniger kostspielige ambulante Versorgung bei HS-Patienten verringert war. Das Vermeiden der Krankheitsprogression durch frühzeitige Diagnose und Optimierung der ambulanten dermatologischen Versorgung könnte HS-bedinge Ausgaben reduzieren.

Hidradenitis suppurativa-related expenditure, a call for awareness: systematic review of literature

Data regarding hidradenitis suppurativa (HS)-related expenditure is limited and non-homogeneous, but HS does incur significant expenses. We performed a systematic review of literature reports documenting financial data regarding any healthcare domain or other expenditure incurred by HS and/or HS impact on work, income and personal economic growth (indirect costs). Three electronic databases were searched (MEDLINE, ScienceDirect, and the Cochrane Library - last search date: September 14^th , 2021). All costs were adjusted for inflation (2022) and converted into US dollars. Twenty-three papers were included (18 cost-of-illness studies, 4 observational studies and 1 case series), drawing economic data from 77,287 HS patients. The total mean cost incurred by HS per patient per year ranged from $ 258 to $ 8,078. This number increased in case of surgical intervention, disease progression, antibiotic failure and certain comorbid diseases. The costliest healthcare sector was inpatient care, followed by outpatient and emergency care. Significant differences were observed between the USA and the rest of studied countries. Hospitalization was likelier, lengthier, and costlier for HS compared to psoriasis patients, whereas the less costly outpatient care appeared to be reduced among HS patients. Preventing disease progression by optimizing early diagnosis and dermatology outpatient care could decrease HS-related expenditure.

Real-World Moderate-to-Severe Hidradenitis Suppurativa: Decrease in Disease Burden With Adalimumab

BACKGROUND

Real-world knowledge of the burden of hidradenitis suppurativa (HS) on patients remains limited.

OBJECTIVES

To measure the impact of adalimumab on moderate-to-severe HS patients' health-related quality of life (HRQoL) and work productivity.

METHODS

In 23 Canadian centres, 138 adults with moderate-to-severe HS requiring a change in ongoing therapy were treated with adalimumab for up to 52 weeks as per the physician's practice. Patient-reported outcome measures (PROMs) were obtained at baseline, weeks 24 and 52 to measure overall HRQoL, HS severity, levels of anxiety and depression, impact and symptoms of HS, work productivity and activity impairment. A post-hoc analysis further explored the PROMs by abscess and inflammatory nodule (AN) count at baseline (≤5, low; 6-10, medium; ≥11, high).

RESULTS

From baseline to weeks 24 and 52, all PRO overall scores improved significantly (P ≤ .0023). The number of patients reporting "good disease control" and "complete disease control" increased from 9.7% to 66.4% over 52 weeks. The score in Health Utility Index Mark 3 (HUI3) pain attribute meaningfully decreased over 52 weeks (mean difference ≥.05). The HS symptoms skin "tenderness" and "itchiness" improved the most. Work productivity loss and activity impairment improved by approximately 20% over 52 weeks. Disease burden improved more in 24 week responders with low and medium AN counts at baseline than in those with high AN count or in 24 week nonresponders.

CONCLUSION

At week 24 and maintained at week 52 in a real-world setting, adalimumab meaningfully improved HRQoL, work productivity, and activity impairment in moderate-to-severe HS patients.

Cost-of-illness study for axillary hyperhidrosis in Japan

The prevalence of primary axillary hyperhidrosis in Japan is 5.75% (males, 6.60%; females, 4.72%) in the population aged 5–64 years. No study on comprehensively evaluated direct medical costs, hygiene product costs, and productivity loss in axillary hyperhidrosis patients has been published in Japan. The aim of this study was to estimate the cost of illness for axillary hyperhidrosis in Japan by conducting a nationwide insurance claims database analysis and a cross‐sectional Web‐based survey. Among patients diagnosed with primary axillary hyperhidrosis at least once between November 2012 and October 2019, health insurance receipt data of 1447 patients were analyzed. A cross‐sectional Web‐based survey was conducted on 321 patients aged 16–59 years with axillary hyperhidrosis to calculate hygiene product costs and productivity loss using a Work Productivity and Activity Impairment questionnaire. Furthermore, nationwide estimation was performed for the hygiene product costs and productivity loss based on the number of patients estimated from the prevalence. The annual direct medical costs per axillary hyperhidrosis patient were ¥91 491 in 2016, ¥93 155 in 2017, and ¥75 036 in 2018. In all of these years, botulinum toxin type A injection accounted for approximately 90% of the total costs. The annual total cost of hygiene products per axillary hyperhidrosis patient was ¥9325. The overall work impairment (%) of working patients with axillary hyperhidrosis was 30.52%, and its monthly productivity loss was ¥120 593/patient. The activity impairment (%) of full‐time housewives with axillary hyperhidrosis was 49.05% and its monthly productivity loss was ¥176 368/patient. The annual hygiene product cost based on the nationwide estimation was ¥24.5 billion and the monthly productivity loss was ¥312 billion. The significant cost associated with axillary hyperhidrosis was clarified. If out‐of‐pocket expenses for treatments not covered by health insurance are included in the estimation, the cost will further increase.

[Epidemiology, patient quality of life, and treatment costs of hidradenitis suppurativa/acne inversa]

Hidradenitis suppurativa/acne inversa (HS) is associated with numerous and relevant restrictions on the quality of life for those affected and their relatives. The exact prevalence of HS varies significantly across studies, but it is likely to be higher than suggested in previous publications. HS care is associated with high costs for the healthcare system and for those affected. The introduction of biologic therapy has led to additional costs, but also to considerable additional benefits in terms of care. In view of the complexity of diagnostics and therapy, there is a particular need for optimized care concepts in order to reduce the burden on those affected, their relatives and the healthcare system.