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King MT, Revicki DA, Norman R, Müller F, Viney RC, Pickard AS, Cella D, Shaw JW. United States Value Set for the Functional Assessment of Cancer Therapy-General Eight Dimensions (FACT-8D), a Cancer-Specific Preference-Based Quality of Life Instrument. PHARMACOECONOMICS - OPEN 2024; 8:49-63. [PMID: 38060096 PMCID: PMC10781923 DOI: 10.1007/s41669-023-00448-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/11/2023] [Indexed: 12/08/2023]
Abstract
OBJECTIVES To develop a value set reflecting the United States (US) general population's preferences for health states described by the Functional Assessment of Cancer Therapy (FACT) eight-dimensions preference-based multi-attribute utility instrument (FACT-8D), derived from the FACT-General cancer-specific health-related quality-of-life (HRQL) questionnaire. METHODS A US online panel was quota-sampled to achieve a general population sample representative by sex, age (≥ 18 years), race and ethnicity. A discrete choice experiment (DCE) was used to value health states. The valuation task involved choosing between pairs of health states (choice-sets) described by varying levels of the FACT-8D HRQL dimensions and survival (life-years). The DCE included 100 choice-sets; each respondent was randomly allocated 16 choice-sets. Data were analysed using conditional logit regression parameterized to fit the quality-adjusted life-year framework, weighted for sociodemographic variables that were non-representative of the US general population. Preference weights were calculated as the ratio of HRQL-level coefficients to the survival coefficient. RESULTS 2562 panel members opted in, 2462 (96%) completed at least one choice-set and 2357 (92%) completed 16 choice-sets. Pain and nausea were associated with the largest utility weights, work and sleep had more moderate utility weights, and sadness, worry and support had the smallest utility weights. Within dimensions, more severe HRQL levels were generally associated with larger weights. A preference-weighting algorithm to estimate US utilities from responses to the FACT-General questionnaire was generated. The worst health state's value was -0.33. CONCLUSIONS This value set provides US population utilities for health states defined by the FACT-8D for use in evaluating oncology treatments.
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Affiliation(s)
- Madeleine T King
- School of Psychology, Faculty of Science, University of Sydney, Sydney, NSW, Australia.
| | - D A Revicki
- Revicki Outcomes Research Consulting, Sarasota, FL, USA
| | - R Norman
- School of Population Health, Curtin University, Perth, WA, Australia
| | - F Müller
- Medical Psychology, Amsterdam UMC Location University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - R C Viney
- Centre for Health Economics Research & Evaluation, Faculty of Health, University of Technology Sydney, Sydney, NSW, Australia
| | - A S Pickard
- Department of Pharmacy Systems, Outcomes and Policy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - D Cella
- Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - J W Shaw
- Patient-Reported Outcomes Assessment, Global Health Economics and Outcomes Research, Bristol Myers Squibb, Lawrenceville, NJ, USA
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Banovic I, Scrima F, Fornasieri I, Beaugerie L, Coquart J, Fourgon C, Iodice P, Nion-Larmurier I, Savoye G, Sorin AL, Tourny C, Augustinova M. Psychometric validation of the French Multidimensional Chronic Asthenia Scale (MCAS) in a sample of 621 patients with chronic fatigue. BMC Psychol 2023; 11:324. [PMID: 37817287 PMCID: PMC10566142 DOI: 10.1186/s40359-023-01358-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 09/28/2023] [Indexed: 10/12/2023] Open
Abstract
BACKGROUND Psychometric validation of the Multidimensional Chronic Asthenia Scale (MCAS) was conducted in order to provide an effective tool for assessing the health-related quality of life of French-speaking patients with chronic asthenia (CA). METHODS Items resulting from the initial formulation of the self-reported MCAS (along with other materials) were completed by French-speaking volunteers with inactive or active inflammatory bowel disease (IBD-I vs. IBD-A) or chronic fatigue syndrome (CFS). Responses from 621 participants (180 patients with IBD-A, 172 with IBD-I, 269 with CFS) collected in a single online survey were divided into three subsamples to test the construct validity of the MCAS (Step 1, N = 240), to confirm its factorial structure (Step 2, N = 204) and to explore its convergent-discriminant validity with the Fatigue Symptoms Inventory (FSI) and revised Piper Fatigue Scale (r-PFS, Step 3, N = 177). RESULTS Steps 1 and 2 showed that, as expected, MCAS has four dimensions: feeling of constraint (FoC), physical (PC), life (LC) and interpersonal consequences (IC), which are also related to the duration of CA (i.e., the longer it lasts, the more the dimensions are impacted). The results further showed that the MCAS is sensitive enough to capture between-group differences, with the CFS group being the most impaired, followed by IBD-A and IBD-I. While convergent-discriminant validity between the 4 factors of MCAS and FSI and r-PFS, respectively, was satisfactory overall, Step 3 also pointed to some limitations that call for future research (e.g., shared variances between the PC and IC dimensions of MCAS and behavioral dimension of r-PFS). CONCLUSION Despite these limitations, the MCAS clearly constitutes a promising tool for measuring quantitative differences (i.e., severity/intensity) in CA associated with various diseases, but also, and importantly, the clinically important differences in domains of its expression (i.e., qualitative differences).
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Affiliation(s)
- Ingrid Banovic
- CRFDP Lab., University of Rouen Normandy, 76821, Mont-Saint-Aignan Cedex, France.
| | - Fabrizio Scrima
- CRFDP Lab., University of Rouen Normandy, 76821, Mont-Saint-Aignan Cedex, France
| | | | - Laurent Beaugerie
- Department of Gastroenterology, Sorbonne Université, INSERM, Institut Pierre Louis d'Epidémiologie Et de Santé Publique, AP-HP, Hôpital Saint-Antoine, 75012, Paris, France
| | - Jérémy Coquart
- CETAPS Lab., University of Rouen Normandy, Mont-Saint-Aignan, France
- Univ. Lille, Univ. Artois, Univ. Littoral Côte d'Opale, ULR - URePSSS - Unité de Recherche Pluridisciplinaire Sport Santé Société, 7369, Lille, France
| | - Chloé Fourgon
- CRFDP Lab., University of Rouen Normandy, 76821, Mont-Saint-Aignan Cedex, France
| | - Pierpaolo Iodice
- CETAPS Lab., University of Rouen Normandy, Mont-Saint-Aignan, France
| | - Isabelle Nion-Larmurier
- Department of Gastroenterology, Sorbonne Université, INSERM, Institut Pierre Louis d'Epidémiologie Et de Santé Publique, AP-HP, Hôpital Saint-Antoine, 75012, Paris, France
| | - Guillaume Savoye
- UMR 10173, Université de Rouen Normandie, Centre Hospitalier Universitaire Charles Nicolle, 76000, Rouen, France
| | - Anne-Laure Sorin
- CRFDP Lab., University of Rouen Normandy, 76821, Mont-Saint-Aignan Cedex, France
| | - Claire Tourny
- CETAPS Lab., University of Rouen Normandy, Mont-Saint-Aignan, France
| | - Maria Augustinova
- CRFDP Lab., University of Rouen Normandy, 76821, Mont-Saint-Aignan Cedex, France
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