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Howell TA, Matza LS, Stone JH, Gelinas D, Stone MN, Rao VTS, Phillips GA. Qualitative interviews to support development of a patient-reported companion measure to the Glucocorticoid Toxicity Index. J Neurol Sci 2024; 458:122907. [PMID: 38309251 DOI: 10.1016/j.jns.2024.122907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 01/25/2024] [Accepted: 01/29/2024] [Indexed: 02/05/2024]
Abstract
INTRODUCTION Glucocorticoids (GCs) are associated with multiple toxicities that have substantial impact on patients. We conducted qualitative interviews with patients to identify the toxicities that are most relevant from their perspective, with the goal of creating a patient-reported companion measure to the Glucocorticoid Toxicity Index (GTI), a clinician-facing instrument. METHODS Thirty-one patients with recent or current GC use participated in concept elicitation interviews. Participants received GC treatment for myasthenia gravis, chronic inflammatory demyelinating polyradiculoneuropathy, vasculitis, or systemic lupus erythematosus. Transcripts were coded following a thematic analysis approach. RESULTS Participants reported more than 100 toxicities they believed to be associated with their GC medications. Common toxicities included weight gain (87%), increased appetite (84%), insomnia/sleep problems (77%), cognitive impairment/brain fog (71%), easy bruising (68%), anxiety (65%), irritability/short temper (65%), and osteoporosis (39%). These toxicities often centered on self-esteem, neuropsychiatric effects, skin toxicities, and musculoskeletal function. They can be categorized into domains such emphasizing neuropsychiatric, metabolic/endocrine, musculoskeletal, and dermatological effects, highlighting aspects of GC toxicity that patients are uniquely positioned to appreciate and report. CONCLUSION Our results confirm that the toxicities associated with GCs are pervasive and diverse, with substantial impact on patients' lives. These data will be used to inform the development of a patient-reported outcome measure assessing GC toxicity. This patient-reported instrument will be designed to complement the clinician-reported GTI, facilitating a more detailed understanding of the nuances of change in GC toxicity.
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Affiliation(s)
| | - Louis S Matza
- Patient-Centered Research, Evidera, Bethesda, MD, USA
| | - John H Stone
- Division of Rheumatology, Allergy, and Immunology, Harvard Medical School, Massachusetts General Hospital, Boston, MA, USA.
| | - Deborah Gelinas
- Health Economics and Outcomes Research, Argenx, Boston, MA, USA
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Matza LS, Howell TA, Fung ET, Janes SM, Seiden M, Hackshaw A, Nadauld L, Karn H, Chung KC. Health State Utilities Associated with False-Positive Cancer Screening Results. Pharmacoecon Open 2024; 8:263-276. [PMID: 38189869 PMCID: PMC10884390 DOI: 10.1007/s41669-023-00443-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/14/2023] [Indexed: 01/09/2024]
Abstract
INTRODUCTION Early cancer detection can significantly improve patient outcomes and reduce mortality rates. Novel cancer screening approaches, including multi-cancer early detection tests, have been developed. Cost-utility analyses will be needed to examine their value, and these models require health state utilities. The purpose of this study was to estimate the disutility (i.e., decrease in health state utility) associated with false-positive cancer screening results. METHODS In composite time trade-off interviews using a 1-year time horizon, UK general population participants valued 10 health state vignettes describing cancer screening with true-negative or false-positive results. Each false-positive vignette described a common diagnostic pathway following a false-positive result suggesting lung, colorectal, breast, or pancreatic cancer. Every pathway ended with a negative result (no cancer detected). The disutility of each false positive was calculated as the difference between the true-negative and each false-positive health state, and because of the 1-year time horizon, each disutility can be interpreted as a quality-adjusted life-year decrement associated with each type of false-positive experience. RESULTS A total of 203 participants completed interviews (49.8% male; mean age = 42.0 years). The mean (SD) utility for the health state describing a true-negative result was 0.958 (0.065). Utilities for false-positive health states ranged from 0.847 (0.145) to 0.932 (0.059). Disutilities for false positives ranged from - 0.031 to - 0.111 (- 0.041 to - 0.111 for lung cancer; - 0.079 for colorectal cancer; - 0.031 to - 0.067 for breast cancer; - 0.048 to - 0.088 for pancreatic cancer). CONCLUSION All false-positive results were associated with a disutility. Greater disutility was associated with more invasive follow-up diagnostic procedures, longer duration of uncertainty regarding the eventual diagnosis, and perceived severity of the suspected cancer type. Utility values estimated in this study would be useful for economic modeling examining the value of cancer screening procedures.
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Affiliation(s)
| | | | - Eric T Fung
- GRAIL, LLC., a subsidiary of Illumina Inc., Menlo Park, CA, USA
| | - Sam M Janes
- UCL Respiratory, University College London, London, UK
| | - Michael Seiden
- Physician in Residence, GRAIL, LLC., Menlo Park, CA, USA
| | | | | | | | - Karen C Chung
- GRAIL, LLC., a subsidiary of Illumina Inc., Menlo Park, CA, USA
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Matza LS, Stewart KD, Redig J, Howell TA, Morris W, Newson RS, Yasui A, Ishak J, Boye KS. Health state utilities associated with weight loss: preferences of people with type 2 diabetes and obesity in Japan. J Med Econ 2024; 27:370-380. [PMID: 38347819 DOI: 10.1080/13696998.2024.2316400] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 02/06/2024] [Indexed: 03/12/2024]
Abstract
AIMS Health state utilities associated with weight change are needed for cost-utility analyses (CUAs) examining the value of treatments for type 2 diabetes and obesity. Previous studies have estimated the utility benefits associated with various amounts of weight reduction in the US and Europe, but preferences for weight change in Asian cultures may differ from these published values. The purpose of this study was to estimate utilities associated with reductions in body weight based on preferences of individuals with type 2 diabetes and obesity in Japan. METHODS Health state vignettes represented type 2 diabetes with respondents' own current weight and weight reductions of 2.5%, 5%, 7.5%, 10%, 12.5%, 15%, and 20%. Utilities were elicited in time trade-off interviews with a sample of respondents in Japan with type 2 diabetes and body mass index (BMI) ≥25 kg/m2 (the cutoff for obesity in Japan). RESULTS Analyses were conducted with data from 138 respondents (84.8% male; mean age = 58.0 years; mean BMI = 29.4 kg/m2) from all eight regions of Japan. Utility gains gradually increased with rising percentage of weight reductions ranging from 2.5% to 15%. Weight reductions of 2.5% to 15% resulted in utility increases of 0.013 to 0.048. The health state representing a 20% weight reduction yielded a wide range of preferences (mean utility increase of 0.044). Equations are recommended for estimating utility change based on any percentage of weight reduction (up to 20%) in Japanese people with type 2 diabetes and obesity. LIMITATIONS This study was conducted in a sample with limited representation of patients with BMI >35 kg/m2 (n = 13) and relatively few women (n = 21). CONCLUSION Results may be used to provide inputs for CUAs examining the value of treatments that are associated with weight loss in patients with type 2 diabetes and obesity in Japan.
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Murray LT, Howell TA, Matza LS, Eremenco S, Adams HR, Trundell D, Coons SJ. Approaches to the Assessment of Clinical Benefit of Treatments for Conditions That Have Heterogeneous Symptoms and Impacts: Potential Applications in Rare Disease. Value Health 2023; 26:547-553. [PMID: 36455827 DOI: 10.1016/j.jval.2022.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/08/2022] [Accepted: 11/20/2022] [Indexed: 05/06/2023]
Abstract
OBJECTIVES Evaluating the clinical benefit of interventions for conditions with heterogeneous symptom and impact presentations is challenging. The same condition can present differently across and within individuals over time. This occurs frequently in rare diseases. The purpose of this review was to identify (1) assessment approaches used in clinical trials to address heterogeneous manifestations that could be relevant in rare disease research and (2) US Food and Drug Administration (FDA)-approved labeling claims that used these approaches. METHODS A targeted literature review was conducted examining peer-reviewed publications and FDA-approved labeling claims from January 2002 to July 2020, focusing on claims incorporating clinical outcome assessments. Approaches were then assessed for their potential application in rare diseases. RESULTS A total of 6 assessment approaches were identified: composite or other multicomponent endpoints, multidomain responder index, most bothersome symptom (MBS), goal attainment scaling, sliding dichotomy, and adequate relief. A total of 59 FDA-approved labeling claims associated with these approaches were identified: composite or other multicomponent endpoints (n=49), MBS (n=9), and adequate relief (n=1). A total of 10 FDA-approved labeling claims, all using multicomponent endpoints, were identified for rare diseases. CONCLUSIONS Multicomponent, MBS, and adequate relief have been included in FDA-approved labeling claims. Multicomponent endpoints, including composite endpoints, were the most frequent way to address heterogeneous manifestations of both common and rare diseases. MBS may be acceptable to regulators, whereas multidomain responder index is unlikely to be. The goal attainment scaling and adequate relief approaches may have potential utility in rare disease trials, assuming the theoretical and statistical challenges inherent in each approach are managed.
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Matza LS, Howell TA, Chounta V, van de Velde N. Patient preferences and health state utilities associated with the treatment process of antiretroviral therapy for people living with HIV. Qual Life Res 2023; 32:531-541. [PMID: 36512302 PMCID: PMC9746581 DOI: 10.1007/s11136-022-03290-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2022] [Indexed: 12/15/2022]
Abstract
PURPOSE People living with HIV (PLHIV) have reported challenges associated with daily oral antiretroviral therapy (ART), including missed doses, negative psychological impact, and difficulty remaining discreet while at home or traveling. Recently approved long-acting injectable (LAI) ART may help eliminate these concerns. The purpose of this study was to examine patient preferences and estimate health state utilities associated with oral and LAI treatment for ART. METHODS Four health state vignettes were developed based on published literature, clinician interviews, and a pilot study. All vignettes included the same description of HIV, but differed in treatment regimens: (A) single daily oral tablet, (B) two daily oral tablets, (C) injections once monthly, and (D) injections every two months. PLHIV in the UK reported their preferences and valued the health states in time trade-off utility interviews. RESULTS The sample included 201 PLHIV (83.1% male; mean age = 44.9y). The health states frequently selected as most preferable were D (n = 119; 59.2%) and A (n = 75; 37.3%). Utility differences among health states were relatively small, which is typical for treatment process utilities (mean utilities: A, 0.908; B, 0.905; C, 0.900; D, 0.910). Statistically significant differences in utility were found for one vs. two tablets and injections every month vs. every two months (p < 0.001). Participants' quotations highlight the wide range of reasons for treatment process preferences. CONCLUSIONS Current results indicate that many PLHIV would prefer LAI ART. The reported utilities may be useful in economic modeling comparing oral vs. LAI ART.
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Affiliation(s)
- Louis S Matza
- Patient-Centered Research, Evidera, Bethesda, MD, USA.
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Howell TA, Matza LS, Mallya UG, Goldstone AP, Scott Butsch W, Lazarus E. Health State Utilities Associated With Hyperphagia: Data for Use in Cost‐Utility Models. Obes Sci Pract 2022. [PMID: 37546284 PMCID: PMC10399521 DOI: 10.1002/osp4.652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Objective Rare genetic diseases of obesity typically present with hyperphagia, a pathologic desire to consume food. Cost-utility models assessing the value of treatments for these rare diseases will require health state utilities representing hyperphagia. This study estimated utilities associated with various hyperphagia severity levels. Methods Four health state vignettes were developed using published literature and clinician input to represent various severity levels of hyperphagia. Utilities were estimated for these health states in a time trade-off elicitation study in a UK general population sample. Results In total, 215 participants completed interviews (39.5% male; mean age 39.1 years). Mean (SD) utilities were 0.98 (0.02) for no hyperphagia, 0.91 (0.10) for mild hyperphagia, 0.70 (0.30) for moderate hyperphagia, and 0.22 (0.59) for severe hyperphagia. Mean (SD) disutilities were -0.08 (0.10) for mild, -0.28 (0.30) for moderate, and -0.77 (0.58) for severe hyperphagia. Conclusions These data show increasing severity of hyperphagia is associated with decreased utility. Utilities associated with severe hyperphagia are similar to those of other health conditions severely impacting quality of life (QoL). These findings highlight that treatments addressing substantial QoL impacts of severe hyperphagia are needed. Utilities estimated here may be useful in cost-utility models of treatments for rare genetic diseases of obesity.
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Affiliation(s)
| | | | - Usha G. Mallya
- Value and Evidence Rhythm Pharmaceuticals Inc Boston MA USA
| | - Anthony P. Goldstone
- PsychoNeuroEndocrinology Research group Division of Psychiatry Department of Brain Sciences Imperial College London and Department of Endocrinology Imperial College Healthcare NHS Trust Hammersmith Hospital London UK
| | - W. Scott Butsch
- Bariatric and Metabolic Institute Cleveland Clinic Cleveland OH USA
| | - Ethan Lazarus
- Clinical Nutrition Center Greenwood Village CO USA
- Department of Family Medicine University of Colorado School of Medicine Aurora CO USA
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Howell TA, Matza LS, Jun MP, Garcia J, Powers A, Maloney DG. Health State Utilities for Adverse Events Associated with Chimeric Antigen Receptor T-Cell Therapy in Large B-Cell Lymphoma. Pharmacoecon Open 2022; 6:367-376. [PMID: 35129829 PMCID: PMC9043043 DOI: 10.1007/s41669-021-00316-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 11/30/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND Chimeric antigen receptor (CAR) T-cell therapy provides effective treatment for large B-cell lymphoma (LBCL). Cost-utility analyses examining and comparing the value of these treatments require health state utilities representing key characteristics to differentiate among therapies. This study estimated utilities for adverse events (AEs) associated with CAR T-cell therapy, including cytokine release syndrome (CRS) and neurological events (NEs). METHODS Health state vignettes were drafted based on literature review, AE reports from a trial of CAR T-cell therapy, and clinician input. Health states were valued in time trade-off interviews with general population participants in the UK. The first vignette described relapsed/refractory LBCL treated with CAR T-cell therapy without AEs. Five other vignettes had the same LBCL and treatment description, with the addition of an AE. Disutilities (i.e., utility decrease) associated with these AEs were calculated by subtracting the utility of the health state without AEs from those of the other health states. RESULTS Interviews were completed with 218 participants (50% male; mean age 49 years). Mean (standard deviation [SD]) utility for CAR T-cell therapy without AEs was 0.73 (0.30). Mean (SD) disutilities associated with CRS were -0.01 (0.04) for grade 1, -0.05 (0.09) for grade 2, and -0.23 (0.24) for grade 3/4. Mean (SD) disutilities associated with NEs were -0.04 (0.07) for grade 1/2 and -0.18 (0.22) for grade 3/4. CONCLUSIONS More severe AEs were associated with greater disutilities. Health state utilities estimated in this study may be useful in cost-effectiveness models examining the value of CAR T-cell therapy in patients with LBCL.
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Affiliation(s)
- Timothy A Howell
- Patient-Centered Research, Evidera, 7101 Wisconsin Avenue, Suite 1400, Bethesda, MD, 20814, USA
| | - Louis S Matza
- Patient-Centered Research, Evidera, 7101 Wisconsin Avenue, Suite 1400, Bethesda, MD, 20814, USA.
| | | | | | | | - David G Maloney
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
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Boye KS, Matza LS, Stewart KD, Andrews H, Howell TA, Stefanski A, Malley KG, Ishak KJ, Fernández Landó L. Health state utilities associated with weight loss in type 2 diabetes and obesity. J Med Econ 2022; 25:14-25. [PMID: 34734554 DOI: 10.1080/13696998.2021.2002062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Health state utilities associated with weight change are needed as inputs for cost-utility analyses (CUAs) examining the value of treatments for obesity and type 2 diabetes (T2D). Although some pharmaceutical treatments currently in development are associated with substantial weight loss, little is known about the utility impact of weight decreases greater than 10%. The purpose of this study was to estimate utilities associated with body weight decreases up to 20% based on preferences of individuals with obesity, with and without T2D. METHODS Health state vignettes were developed to represent respondents' own current weight and weight decreases of 2.5, 5, 10, 15, and 20%. Health state utilities were elicited in time trade-off interviews in two UK locations (Edinburgh and London) with a sample of participants with obesity, with and without T2D. Mean utility increases associated with each amount of weight decrease were calculated. Regression analyses were performed to derive a method for estimating utility change associated with weight decreases. RESULTS Analyses were conducted with data from 405 individuals with obesity (202 with T2D, 203 without T2D). Utility increases associated with various levels of weight decrease ranged from 0.011 to 0.060 in the subgroup with T2D and 0.015 to 0.077 in the subgroup without T2D. All regression models found that the percentage of weight decrease was a highly significant predictor of change in utility (p < .0001). The relationship between weight change and utility change did not appear to be linear. Equations are recommended for estimating utility change based on the natural logarithm of percentage of weight decrease. DISCUSSION Results of this study may be used to provide inputs for CUAs examining and comparing the value of treatments that are associated with substantial amounts of weight loss in patients with obesity, with or without T2D.
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Affiliation(s)
| | - Louis S Matza
- Patient-Centered Research, Evidera, Bethesda, MD, USA
| | | | - Haylee Andrews
- Formerly of Patient-Centered Research, Evidera, Bethesda, MD, USA
| | | | | | | | - K Jack Ishak
- Patient-Centered Research, Evidera, Bethesda, MD, USA
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Currie BM, Howell TA, Matza LS, Cox DA, Johnston JA. A Review of Interventional Trials in Youth-Onset Type 2 Diabetes: Challenges and Opportunities. Diabetes Ther 2021; 12:2827-2856. [PMID: 34554411 PMCID: PMC8519987 DOI: 10.1007/s13300-021-01136-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 08/03/2021] [Indexed: 11/28/2022] Open
Abstract
INTRODUCTION In recent decades, the dramatic rise of obesity among youth in the US has been accompanied by a rise in the prevalence of type 2 diabetes (T2D) in this population. This alarming trend underscores the importance of conducting trials to evaluate new therapies in children with T2D. METHODS A targeted review of peer-reviewed literature and trials registered on www.clinicaltrials.gov was conducted in January 2021 to identify pharmaceutical interventional studies in youth with T2D. Information regarding enrollment data, study design elements, subjects' baseline characteristics, and key treatment outcomes was documented. RESULTS Among the 16 clinical studies included in this review, only five appeared to meet projected enrollment targets in < 4 years. Although three other studies met recruitment targets, two took approximately 5 years to complete and the third took nearly 10 years. CONCLUSIONS Despite legislation requiring evaluation of pharmaceutical treatments in pediatric populations, surprisingly few interventional studies have been conducted in children with T2D. This review highlights that recruitment challenges may be impeding the conduct and completion of interventional studies. Consequently, few pharmaceutical treatments have been proven to be effective and approved for children with T2D. Metformin and liraglutide remain the only non-insulin treatments formally approved in the US for use in this population. More clinical research is needed to support regulatory decision-making as well as treatment decisions for children with T2D in clinical settings. Sponsors and investigators will need to implement strategies for improving trial enrollment as well as work with regulatory agencies to develop novel study designs that may require fewer patients.
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Affiliation(s)
- Brooke M. Currie
- Evidera, 7101 Wisconsin Avenue, Suite 1400, Bethesda, MD 20814 USA
| | | | - Louis S. Matza
- Evidera, 7101 Wisconsin Avenue, Suite 1400, Bethesda, MD 20814 USA
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Tabberer M, von Maltzahn R, Bacci ED, Karn H, Hsieh R, Howell TA, Bailes Z, Fowler A, Lee L, Murray LT. Measuring respiratory symptoms in moderate/severe asthma: evaluation of a respiratory symptom tool, the E-RS®: COPD in asthma populations. J Patient Rep Outcomes 2021; 5:104. [PMID: 34632556 PMCID: PMC8502721 DOI: 10.1186/s41687-021-00338-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 06/30/2021] [Indexed: 11/23/2022] Open
Abstract
Background Symptom constructs included in the Evaluating Respiratory Symptoms in Chronic Obstructive Pulmonary Disease (E-RS®: COPD) tool may be relevant to patients with asthma. The purpose of this study was to evaluate content validity and psychometric performance of the E-RS: COPD in moderate/severe asthma patients. Methods Content validity of the E-RS: COPD was evaluated in patients with moderate/severe asthma using concept elicitation and cognitive debriefing interviews. Secondary analyses using data from two clinical trials in patients with moderate/severe asthma evaluated the factor structure of the E-RS: COPD plus two supplementary items (wheeze; shortness of breath with strenuous physical activity) and assessed psychometric properties of the tool, which will be referred to as E-RS®: Asthma when used in asthma populations. Results Qualitative interviews (N = 25) achieved concept saturation for asthma respiratory symptoms. Concepts in the E-RS: COPD were relevant to patients and instructions were understood. Most patients (19/25; 76%) reported experiencing all concepts in the E-RS: COPD; no patients indicated missing symptoms. Secondary analyses of clinical trial data supported the original factor structure (RS-Total and three symptom-specific subscales). The two supplemental items did not fit with this factor structure and were not retained. RS-Total and subscale score reliability was high (internal consistency [α] > 0.70). Validity was demonstrated through significant (P < 0.0001) relationships with the St George’s Respiratory Questionnaire (SGRQ) and Asthma Symptom Severity scale. E-RS: Asthma was responsive to change when evaluated using SGRQ, Patient Global Impression of Change and Asthma Quality of Life Questionnaire as anchors (P < 0.0001). Clinically meaningful change thresholds were also identified (RS-Total: − 2.0 units). Conclusions The E-RS: Asthma is reliable and responsive for evaluating respiratory symptoms in patients with moderate/severe asthma. Supplementary Information The online version contains supplementary material available at 10.1186/s41687-021-00338-6.
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Affiliation(s)
- Maggie Tabberer
- GSK House, 980 Great West Road, Brentford, Middlesex, TW8 9GS, UK.
| | | | - Elizabeth D Bacci
- Evidera, Patient-Centered Research, 615 2nd Avenue, Seattle, WA, 98104, USA
| | - Hayley Karn
- Evidera, Patient-Centered Research, 201 Talgarth Road, London, W6 8BJ, UK
| | - Ray Hsieh
- Evidera, Patient-Centered Research, 7101 Wisconsin Avenue, Bethesda, MD, 20814, USA
| | - Timothy A Howell
- Evidera, Patient-Centered Research, 7101 Wisconsin Avenue, Bethesda, MD, 20814, USA
| | - Zelie Bailes
- GSK House, 980 Great West Road, Brentford, Middlesex, TW8 9GS, UK
| | - Andrew Fowler
- GSK House, 980 Great West Road, Brentford, Middlesex, TW8 9GS, UK
| | - Laurie Lee
- GSK, 1250 S Collegeville Road, Collegeville, PA, 19426, USA
| | - Lindsey T Murray
- Evidera, Patient-Centered Research, 7101 Wisconsin Avenue, Bethesda, MD, 20814, USA
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Matza LS, Phillips GA, Howell TA, Ciffone N, Ahmad Z. Estimating health state utilities associated with a rare disease: familial chylomicronemia syndrome (FCS). J Med Econ 2020; 23:978-984. [PMID: 32479143 DOI: 10.1080/13696998.2020.1776719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Aims: Familial chylomicronemia syndrome (FCS) is a rare genetic disorder with no currently approved therapies. Treatments are in development, and cost-utility analyses will be needed to examine their value. These models will require health state utilities representing FCS. Therefore, the purpose of this study was to estimate utilities for FCS and an associated episode of acute pancreatitis (AP).Methods: Because it is not feasible to gather a large enough sample of patients with this extremely rare condition to complete standardized preference-based measures, vignette-based methods were used to estimate utilities. In time trade-off interviews, general population participants in the UK and Canada valued health state vignettes drafted based on literature review, clinician input, and interviews with patients. Four health states described variations of FCS. A fifth health state, describing AP, was added to one of the other health states to evaluate its impact on utility.Results: A total of 308 participants provided utility data (208 UK; 100 Canada). Mean utilities for FCS health states ranged from 0.46 to 0.83, with higher triglycerides, more severe symptoms, and a history of AP associated with lower utility values. The disutility (i.e. utility decrease) of AP ranged from -0.17 to -0.25, with variations depending on the health state to which it was added. Utility means were similar in the UK and Canada.Conclusions: The vignette-based approach is useful for estimating utilities of a rare disease. The health state utilities derived in this study would be useful in models examining cost-effectiveness of treatments for FCS.
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Affiliation(s)
- Louis S Matza
- Patient-Centered Research, Evidera, Bethesda, MD, USA
| | - Glenn A Phillips
- Value & Evidence Generation, Rhythm Pharmaceuticals, Boston, MA, USA
| | | | | | - Zahid Ahmad
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Matza LS, Deger KA, Howell TA, Koetter K, Yeager AM, Hogge D, Fisher V, Louie AC, Chung KC. Health state utilities associated with treatment options for acute myeloid leukemia (AML). J Med Econ 2019; 22:567-576. [PMID: 30775943 DOI: 10.1080/13696998.2019.1584108] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Aims: Acute myeloid leukemia (AML) treatment typically involves remission induction chemotherapy followed by consolidation chemotherapy. New treatments for AML have recently been introduced, including a chemotherapy formulation called CPX-351, which is administered via less time-intensive IV infusion than the standard "7 + 3" continuous infusion regimen of cytarabine plus an anthracycline. The purpose of this study was to estimate utilities that could be used in economic modeling of AML treatment. Materials and methods: In time trade-off interviews, participants from the UK general population valued 12 health states drafted based on literature and clinician interviews. To identify disutility associated with chemotherapy, two types of induction and four types of consolidation were added to an otherwise identical health state describing AML. The decrease in utility when adding these chemotherapy regimens represents the disutility of each regimen. Five additional health states were valued to estimate utilities associated with other AML treatments. Results: Two hundred participants completed interviews. Mean (SD) utilities were 0.55 (0.31) for pre-treatment AML and 0.66 (0.29) for AML in temporary remission. Adding any chemotherapy significantly decreased utility (p < 0.0001). Induction had a mean disutility of -0.11 with CPX-351 and -0.15 with 7 + 3. Mean disutility for consolidation ranged from -0.03 with outpatient CPX-351 to -0.11 with inpatient 5 + 2. Utilities are also reported for other AML treatments (e.g. transplant, low-intensity chemotherapy). Limitations: One limitation is that the differences in adverse event profiles between the treatment regimens were based on clinician opinion. Future use of CPX-351 in clinical trials or clinical settings will provide additional information on its adverse event profile. Conclusions: While all chemotherapy regimens were associated with disutility, regimens with shorter hospitalization and less time-intensive infusion were generally perceived as preferable. These utilities may be useful in cost-utility models comparing the value of AML treatments.
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Affiliation(s)
- Louis S Matza
- a Patient-Centered Research , Evidera , Bethesda , MD , USA
| | | | | | | | | | - Donna Hogge
- e Gordon and Leslie Diamond Health Care Centre , Vancouver , BC , Canada
| | - Vicki Fisher
- f Jazz Pharmaceuticals, Inc , Palo Alto , CA , USA
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Howell TA, Bernstein Ratner N. Use of a phoneme monitoring task to examine lexical access in adults who do and do not stutter. J Fluency Disord 2018; 57:65-73. [PMID: 29454469 PMCID: PMC8965821 DOI: 10.1016/j.jfludis.2018.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 01/22/2018] [Accepted: 01/26/2018] [Indexed: 05/27/2023]
Abstract
Previous work has postulated that a deficit in lexicalization may be an underlying cause of a stuttering disorder (Prins, Main, & Wampler, 1997; Wingate, 1988). This study investigates the time course of lexicalization of nouns and verbs in adults who stutter. A generalized phoneme monitoring (PM) paradigm was used. Adults who stutter (AWS) and typically-fluent peers both showed an expected effect of word class (verbs yielded slower and less accurate monitoring than nouns), as well as phoneme position (word medial/final phonemes yielded slower and less accurate monitoring than word initial phonemes). However, AWS had considerably more difficulty when targets to be monitored were embedded in the medial position. A negative correlation between speed and accuracy was found in typically fluent adults, but not in AWS. AWS also scored nonsignificantly more poorly on an experimental language task. Because of the additional difficulty noted in AWS with word-medial targets, our results provide evidence of phonological encoding differences between the two groups. Expanded use of the PM paradigm is recommended for the exploration of additional aspects of language processing in people who stutter.
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Affiliation(s)
- Timothy A Howell
- Department of Hearing and Speech Sciences, University of Maryland, 0100 Samuel J. LeFrak Hall, 7251 Preinkert Dr., College Park, MD 20742, United States
| | - Nan Bernstein Ratner
- Department of Hearing and Speech Sciences, University of Maryland, 0100 Samuel J. LeFrak Hall, 7251 Preinkert Dr., College Park, MD 20742, United States.
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Abstract
BACKGROUND Cigarette smoking contributes to a number of health-related problems, but its impact on renal transplant survival beyond accelerated patient death is unclear. METHODS We performed a cohort study of 645 adult renal allograft recipients from 1985 to 1995 to evaluate the relationship between smoking and graft outcome. RESULTS Twenty-four percent of recipients (156/645) were smokers at the time of transplant evaluation. Of these, 90% continued to smoke after transplantation. Pretransplant smoking was significantly associated with reduced overall graft and death-censored graft survival. Patients who were smokers at the time of pretransplant evaluation had kidney graft survival of 84%, 65%, and 48% at 1, 5, and 10 years, respectively, compared with graft survival in nonsmokers of 88%, 78%, and 62% (P=0.007). Pretransplant smoking adversely affected death-censored graft survival in recipients of cadaveric (P=0.02) and of living donor kidneys (P=0.02). Reduced graft survival in pretransplant smokers could not be accounted for by differences in rejection (64% vs. 61%, P=0.35). In a multivariate analysis, pretransplant smoking was associated with a relative risk of 2.3 for graft loss. Among patients with a smoking history before transplantation, death-censored graft survival was significantly higher for those who quit smoking before transplant evaluation. CONCLUSIONS Cigarette smoking before kidney transplantation contributes significantly to allograft loss. The effect of smoking on graft outcome is not explained by increases in rejection or patient death. Smoking cessation before renal transplantation has beneficial effects on graft survival. These effects should be emphasized to patients with end-stage renal disease who are considering renal transplantation.
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Affiliation(s)
- R S Sung
- Department of Surgery, 2926 Taubman Center, University of Michigan Health System, 1500 East Medical Center Drive, Ann Arbor, MI 48109-0331, USA
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Sung RS, Althoen M, Howell TA, Merion RM. Peripheral vascular occlusive disease in renal transplant recipients: risk factors and impact on kidney allograft survival. Transplantation 2000; 70:1049-54. [PMID: 11045641 DOI: 10.1097/00007890-200010150-00010] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND This study evaluated the relationship between renal transplantation and the evolution of lower extremity peripheral vascular occlusive disease (PVOD). METHODS A total of 664 adult renal allograft recipients from 1985-1995 were retrospectively reviewed for atherosclerotic risk factors and peripheral vascular occlusive disease (PVOD). PVOD events were defined as bypass, major amputation, claudication, or percutaneous angioplasty. Follow-up ranged from 2-12 years. RESULTS The cumulative 5- and 10-year incidences of lower extremity PVOD after renal transplantation were 4.2 and 5.9%. Eight of 14 patients (57%) with pretransplant PVOD had additional PVOD events versus de novo appearance of PVOD in 21/650 patients (3.2%; P<0.0001). In a proportional hazards model, age, preoperative PVOD, diabetes, and postoperative smoking were independent risk factors for the development of PVOD after transplantation. Recipients with lower extremity PVOD had significantly lower 10-year patient and graft survival. Increased graft failure was due to an excess of deaths with a functioning graft. A total of 34 major interventions were performed. One- and two-year limb salvage rates were 64.2 and 53.8%. CONCLUSIONS Lower extremity PVOD after renal transplantation is associated with diminished patient survival, and affects kidney graft survival via disproportionate patient attrition. Age, preoperative PVOD, diabetes, and postoperative smoking are important risk factors. Transplantation does not appear to either accelerate or retard the progression of disease. An aggressive approach towards limb salvage in properly selected patients is justifiable.
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Affiliation(s)
- R S Sung
- Department of Surgery, University of Michigan Health System, Ann Arbor 48109-0331, USA
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Abstract
Phylogenetic comparisons between homologous proteins can provide information on the rates of molecular evolution of the proteins. G protein-coupled receptors are a "superfamily" of proteins which exist in species ranging from yeast to man. Based on an analysis of the percentage of amino acid homology between various species, the rate of molecular evolution of G protein-coupled receptors can be estimated at approx 1% per 10 million years. Based on this assumption, the primordial 5-HT receptor must have evolved more than 700-800 million years ago since the 3 major classes of G protein-coupled 5-HT receptors (i.e. 5-HT1, 5-HT2 and 5-HT6 receptors) are less than 25% homologous. 5-HT5, 5-HT7, 5-HTsnail, 5-HTdro and 5-HT1A receptors differentiated approx 600-700 million years ago, the time period during which vertebrates diverged from invertebrates. The mammalian 5-HT receptor subtypes have differentiated over the past 90 million years. Thus, although a recent flurry of "new" 5-HT receptors have appeared in the literature, the first "primordial" 5-HT receptor evolved over 750 million years ago, a date which likely predates the evolution of muscarinic, dopaminergic and adrenergic receptor systems. This analysis also predicts that a significant number of both mammalian and invertebrate G protein-coupled 5-HT receptor subtypes remain to be identified.
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Affiliation(s)
- S J Peroutka
- Palo Alto Institute for Molecular Medicine, Hillsborough, CA 94010
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