Development and initial validation of the AL-PROfile patient-reported outcome measure in light chain (AL) amyloidosis.

OBJECTIVE: To evaluate the psychometric properties of the AL-PROfile, a patient-reported outcome measure combining the Patient-Reported Outcomes Measurement Information System (PROMIS)-29, two items from PROMIS Cognitive Function, and select Patient-Reported Outcomes version of the Common Terminology Criteria for Adverse Events (PRO-CTCAE) items. METHODS: Content validity was assessed through cognitive debriefing interviews of 20 patients who completed the AL-PROfile (Study 1). Study 2 involved 297 participants who completed the AL-PROfile and Medical Outcomes Study 36-item Short-Form Health Survey (SF-36). Reliability (internal consistency and test-retest reliability) and validity (convergent and discriminant validity, known groups validity by stage/organ involvement) were calculated. RESULTS: Study 1 participants found the AL-PROfile straightforward confirming the relevance of the included content. Some felt that certain questions were not related to their amyloidosis experience. Study 2 demonstrated acceptable internal consistency for all domains/items except PROMIS Cognitive Function and acceptable test-retest reliability for all except PROMIS Cognitive Function and PRO-CTCAE nausea. Large correlations were seen for the same domain across measures while correlations for divergent domains within a measure and different domains across different measures were small. The PRO-CTCAE items showed small to medium correlations with each other and with PROMIS and SF-36 domains. Stage was associated with physical function, fatigue, social roles, swelling, and shortness of breath scores. CONCLUSION: The AL-PROfile has acceptable reliability and validity for use in systemic light chain amyloidosis patients.

Using a Modified Delphi Panel to Estimate Health Service Utilization for Patients with Advanced and Non-Advanced Systemic Light Chain Amyloidosis.

Purpose: Patients with diagnosed with systemic light chain (AL) amyloidosis at advanced Mayo stages have greater morbidity and mortality than those diagnosed at non-advanced stages. Estimating service use by severity is difficult because Mayo stage is not available in many secondary databases. We used an expert panel to estimate healthcare utilization among advanced and non-advanced AL amyloidosis patients. Patients and Methods: Using the RAND/UCLA modified Delphi method, expert panelists completed 180 healthcare utilization estimates, consisting of inpatient and outpatient visits, testing, chemotherapy, and procedures by disease severity and organ involvement during two treatment phases (the 1 year after starting first line [1L] therapy and 1 year following treatment [post-1L]). Estimates were also provided for post-1L by hematologic treatment response (complete or very good partial response [CR/VGPR], partial, no response or relapse [PR/NR/R]). Areas of disagreement were discussed during a meeting, after which ratings were completed a second time. Results: During 1L therapy, 55% of advanced patients had ≥1 hospitalization and 38% had ≥2 admissions. Rates of hematopoietic stem cell transplant (HSCT) in advanced patients were 5%, while pacemaker or implantable cardioverter defibrillator (ICD) placement were 15%. During post-1L therapy, rates of hospitalization in advanced patients remained high (≥1 hospitalization: 20-43%, ≥2 hospitalizations: 10-20%), and up to 10% of advanced patients had a HSCT. Ten percent of these patients underwent pacemaker/ICD placement. Conclusion: Experts estimated advanced patients, who would not be good candidates for HSCT, would have high rates of hospitalization (traditionally the most expensive type of healthcare utilization) and other health service use. The development of new treatment options that can facilitate organ recovery and improve function may lead to decreased utilization.

Differences in patient-reported outcomes (PROs) by disease severity in light chain (AL) amyloidosis.

OBJECTIVE: To assess the impact of organ involvement on patient-reported outcomes (PROs) in light chain (AL) amyloidosis. METHODS: PROs were evaluated using the KCCQ-12, PROMIS-29 + 2, and SF-36 in individuals with AL amyloidosis. The 2004 Mayo system was used to stage disease and cardiac, neurologic, and renal involvement was considered. Global physical and mental health (MH) scores, physical function (PF), fatigue, social function (SF), pain, sleep, and MH domains were evaluated. Effect sizes between scores were measured using Cohen's d. RESULTS: Of 297 respondents, the median age at diagnosis was 60 years with 58% cardiac, 58% renal, and 30% neurologic involvement. Fatigue, PF, SF, and global physical health with PROMIS and SF-36 discriminated the most by stage. Significant discrimination in PROMIS and/or SF-36 was seen in PF, fatigue, and global physical health with cardiac involvement. For neurologic involvement, PF, fatigue, SF, pain, sleep, global physical, and MH with PROMIS and role physical, vitality, pain, general health, and physical component summary with SF-36 were discriminatory. For renal amyloid, pain by SF-36 and PROMIS, and SF-36 MH and role emotional subscales were significant. CONCLUSIONS: Fatigue, PF, SF, and global physical health can discriminate stage, cardiac and neurologic, but not renal, AL amyloidosis involvement.

A cross-sectional study of patient-reported outcomes and symptom burden using PROMIS and PRO-CTCAE measures in light chain amyloidosis.

BACKGROUND: We conducted a cross-sectional study to characterize health-related quality of life and symptom burden in individuals living with light chain (AL) amyloidosis. METHODS: Members of the Amyloidosis Support Groups, Inc. with AL amyloidosis who consented to this IRB-approved survey provided information on their amyloidosis diagnosis, treatment, symptoms, and functioning. HRQL was measured using PROMIS and PRO-CTCAE questionnaires. RESULTS: Among 297 participants who responded, the median age at diagnosis was 60 years (23-82) with 52% female and 90% white race. There were 69% AL (lambda) and 39% reported 3 or more organs involved with amyloidosis (58% cardiac, 58% renal, 30% neurological AL). Time from diagnosis was less than 2 years in 64 (22%), 2-5 years in 105 (36%), > 5 years in 126 (43%), and unknown in 2 (< 1%) individuals. Therapy included prior chemotherapy in 88% and stem cell transplant in 52%. Fifty percent of the cohort was on active treatment. Multiple domains were impaired in AL amyloidosis compared to the general population, including physical function, fatigue, and social roles. While highest among those within 2 years of diagnosis, high symptom burden was also seen in long-term survivors. A trend to decreased severity and number of impaired symptoms was seen with longer treatment-free interval but many symptoms remained persistent. CONCLUSIONS: Significant and persistent symptom burden is seen in AL amyloidosis. Patient-reported outcomes should be routinely measured and used to provide best supportive care to all AL amyloidosis patients, including long-term survivors and those not on active therapy.

Development of a conceptual model of patient-reported outcomes in light chain amyloidosis: a qualitative study.

BACKGROUND: Light chain (AL) amyloidosis is a plasma cell neoplasm associated with high early mortality and severe morbidity that can cause severe disability. We explored the impact of AL amyloidosis on symptoms and well-being from the perspectives of patients and health care providers who regularly care for AL patients. We intended to develop a conceptual understanding of patient-reported outcomes in AL amyloidosis to identify the context of use and concept of interest for a clinical outcome assessments tool in this disease. METHOD: Twenty patients and ten professionals were interviewed. Patient interviews captured the spectrum of amyloidosis experience including time from diagnosis, type of organ involvement, and presence and type of treatment received. Interviews with professionals included physicians, advanced practice providers, registered nurse, and a patient advocate; these interviews covered similar topics. RESULTS: The impact of AL amyloidosis on patients' life was multidimensional, with highly subjective perceptions of normality and meaning. Four major themes from patients and experts included diagnosis of AL amyloidosis, living with AL amyloidosis, symptom burden, and social roles. Barriers to patient-reported outcomes data collection in patients were additionally explored from experts. The themes provide a comprehensive understanding of the important experiences of symptom burden and its impact on daily life from AL amyloidosis patients' and from the perspectives of professionals who care for patients with AL amyloidosis. CONCLUSION: These findings further the conceptual understanding and identification of a preliminary model of concept of interest for development of a clinical outcome assessments tool for AL amyloidosis.

Best Practices in Specialized Amyloidosis Centers in the United States: A Survey of Cardiologists, Nurses, Patients, and Patient Advocates.

BACKGROUND: Because transthyretin amyloid cardiomyopathy (ATTR-CM) poses unique diagnostic and therapeutic challenges, referral of patients with known or suspected disease to specialized amyloidosis centers is recommended. These centers have developed strategic practices to provide multidisciplinary comprehensive care, but their best practices have not yet been well studied as a group. METHODS: A qualitative survey was conducted by telephone/email from October 2019 to February 2020 among eligible healthcare providers with experience in the management of ATTR-CM at US amyloidosis centers, patients with ATTR-CM treated at amyloidosis centers, and patient advocates from amyloidosis patient support groups. RESULTS: Fifteen cardiologists and 9 nurse practitioners/nurses from 15 selected amyloidosis centers participated in the survey, with 16 patients and 4 patient advocates. Among participating healthcare providers, the most frequently cited center best practices were diagnostic capability, multidisciplinary care, and time spent on patient care; the greatest challenges involved coordination of patient care. Patients described the "ideal" amyloidosis program as one that provides physicians with expertise in ATTR-CM, sufficient time with patients, comprehensive patient care, and opportunities to participate in research/clinical trials. The majority of centers host patient support group meetings, and patient advocacy groups provide support for centers with physician/patient education and research. CONCLUSIONS: Amyloidosis centers offer comprehensive care based on staff expertise in ATTR-CM, a multidisciplinary approach, advanced diagnostics, and time dedicated to patient care and education. Raising awareness of amyloidosis centers' best practices among healthcare providers can reinforce the benefits of early referral and comprehensive care for patients with ATTR-CM.

Light Chain (AL) Amyloidosis: The Journey to Diagnosis.

BACKGROUND: Light chain (AL) amyloidosis is a rare, complex disease associated with significant morbidity and mortality. Delays in diagnosis are common and may have detrimental consequences on patients' prognosis. Too little is known regarding the patient journey to diagnosis. OBJECTIVE: The objective of this study was to describe the patient-reported journey to a correct diagnosis for AL amyloidosis. METHODS: Using a mixed-methods approach, data were collected from clinician (n = 4) and patient (n = 10) interviews and a survey of community-based patients with AL amyloidosis (n = 341). Data were used to document the patient experience between the onset of symptoms and the receipt of a diagnosis. RESULTS: Delays in diagnosis were common. Qualitative and quantitative data indicated that initial symptoms were varied and similar to other more prevalent diseases. Two themes regarding the journey to diagnosis emerged: (1) barriers to an early diagnosis; and (2) the emotional toll of the journey. Time to diagnosis was heavily influenced by how patients interpreted their initial symptoms, whether they sought early medical help, and challenges associated with making differential diagnoses. Survey results indicate that patients with primary cardiac involvement were more likely to receive a delayed diagnosis than those with primary kidney involvement. Patients described mixed emotions associated with the eventual diagnosis of AL amyloidosis. CONCLUSIONS: These data support a need for better early identification and support for patients seeking a diagnosis. Increasing clinician awareness may reduce the time to diagnosis. Additional research is needed to identify optimal diagnostic testing to reduce delays in treatment initiation and subsequent severe impacts on health.