Publications by authors named "Patrick Marquis"

People living with hemophilia A face challenges impacting their daily lives despite treatment innovations. Previous studies have explored perceptions and treatment experiences; however, there is a lack of an evidence-based, comprehensive model to identify concepts (clinical, physical, and psychological functioning) relevant for people with hemophilia A (PwHA). The aim of this qualitative study was to address the question: What is the humanistic and symptomatic experience of adolescents, adults, and children living with hemophilia A and what is the impact of hemophilia A on their quality of life? Participants, identified through patient associations in the UK, were male PwHA and caregivers of male PwHA receiving prophylactic treatment.

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Article Synopsis
  • This study explores the patient experience of non-metastatic cutaneous squamous cell carcinoma (CSCC), focusing on identifying common symptoms and impacts on quality of life.
  • The researchers developed a conceptual model by reviewing literature, analyzing patient blogs, and conducting interviews with both patients and dermatologists.
  • They found that existing patient-reported outcome (PRO) instruments, particularly the FACE-Q Skin Cancer, need enhancements to better address the physical, psychological, and behavioral aspects of CSCC treatment experiences.
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Introduction: Following a review of patient-reported outcome (PRO) instruments in the literature, existing PRO instruments may not adequately capture the experience of receiving treatment for proliferative diabetic retinopathy (PDR). Therefore, this study aimed to develop a de novo instrument to comprehensively assess the patient experience of PDR.

Methods: This qualitative, mixed-methods study comprised item generation for the Diabetic Retinopathy-Patient Experience Questionnaire (DR-PEQ), content validation in patients with PDR, and preliminary Rasch measurement theory (RMT) analyses.

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Introduction: Small cell lung cancer (SCLC) is a subtype of lung cancer, the second most common cancer diagnosis worldwide. Currently, there is little published qualitative research that provides insight into the disease-related symptoms and impacts that are relevant to patients living with SCLC as directly reported by patients themselves.

Methods: This qualitative, cross-sectional, noninterventional, descriptive study included concept elicitation interviews with participants diagnosed with SCLC and the development of a conceptual model of clinical treatment benefit.

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Introduction: Few qualitative studies have explored the patient experience of daily life with proliferative diabetic retinopathy (PDR) and associated treatments. Herein, a conceptual model was developed to comprehensively examine symptoms, functional impacts, and treatment experiences in PDR.

Methods: A qualitative, mixed-methods study comprising a literature search and semi-structured interviews with clinicians and patients was conducted.

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Objectives: There is little in-depth qualitative evidence of how symptoms manifest themselves in outpatients with COVID-19 and how these in turn impact outpatients' daily lives. The objective of the study was therefore to explore the experience of outpatients with COVID-19 qualitatively, concerning the symptomatic experience and its subsequent impact on daily life.

Setting: Qualitative research study comprising virtual in-depth, open-ended interviews with outpatients and clinicians.

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Introduction: Fibrodysplasia ossificans progressiva (FOP) is an ultra-rare, severely disabling, autosomal dominant, congenital disease characterized by progressive multi-focal heterotopic ossification (HO) of skeletal muscle, ligaments, tendons, and fascia. Past FOP studies have focused on the clinical aspects of the disease; therefore, there is a paucity of qualitative research on the patient experience. Our objective was to better understand the experience of children and adolescents living with FOP from their and their parents' perspectives.

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Introduction: Patient-centered outcome measurement (PCOM) is essential to capture the outcomes important to patients. However, it presents unique challenges in rare diseases, particularly those that are "young" (not diagnosed before the twenty-first century), with limited literature, lack of disease-specific patient-reported outcome (PRO) measures, and difficult sampling and data collection. One example of this is NUT (nuclear protein in testis) carcinoma (NUTca), a rare and rapidly progressing cancer, with tumors preliminary in the head, neck, and lungs.

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Introduction: NUT (nuclear protein of the testis) carcinoma (NUTca) is a rare and aggressive cancer that is genetically hallmarked by a chromosomal abnormality in the NUT gene, and presents with tumors in the head, neck, and lungs. Currently there is no standard of care, but patients may undergo surgery, radiation, and/or chemotherapy. There is a lack of published research describing the patient experience of NUTca.

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Purpose: Physical functioning and fatigue are key patient concerns in myelodysplastic syndromes (MDS), chronic myelomonocytic leukemia (CMML), and acute myeloid leukemia (AML). The objective of this research was to generate supportive quantitative evidence for modular physical functioning and fatigue measures based on the European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire Core 30 items (QLQ-C30) and a customized selection of 10 supplemental items from the EORTC Item Library.

Methods: The 40 items were completed online cross-sectionally by 51 patients (higher risk [HR] MDS: 53%; CMML: 26%; AML: 10%).

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Introduction: Fatigue is one of the most important symptoms reported by patients with systemic lupus erythematosus (SLE) and a key concept of interest in SLE clinical trials. Despite this, fatigue remains poorly understood and sub-optimally measured by existing patient-reported outcome (PRO) instruments and scales. Here, we psychometrically evaluated the measurement properties of three PRO scales that purport to measure fatigue, using data from two SLE clinical trials.

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A 64-year-old man presented with severe myocarditis 6 weeks after an initial almost asymptomatic severe acute respiratory syndrome coronavirus-2 (SARS-CoV2) infection. He was found to have a persistent positive swab. Mechanisms explaining myocardial injury in patients with COVID-19 remains unclear, but this case suggests that severe acute myocarditis can develop in the late phase of COVID-19 infection, even after a symptom-free interval.

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Speech perception is mediated by both left and right auditory cortices but with differential sensitivity to specific acoustic information contained in the speech signal. A detailed description of this functional asymmetry is missing, and the underlying models are widely debated. We analyzed cortical responses from 96 epilepsy patients with electrode implantation in left or right primary, secondary, and/or association auditory cortex (AAC).

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Purpose In this study, we investigate temporal adaptation capacities of children with normal hearing and children with cochlear implants and/or hearing aids during verbal exchange. We also address the question of the efficiency of a rhythmic training on temporal adaptation during speech interaction in children with hearing loss. Method We recorded electroencephalogram data in children while they named pictures delivered on a screen, in alternation with a virtual partner.

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Background: Novel, pragmatic, patient-centered strategies are needed to ensure fit-for-purpose patient-reported outcomes (PRO) instruments in clinical trial research for rare diseases such as myelodysplastic syndromes (MDS), acute myeloid leukemia (AML), and chronic myelomonocytic leukemia (CMML). The objective of the current study was to select supplemental items to add to the European Organization for Research and Treatment of Cancer (EORTC) Quality of Life-Core 30 (QLQ-C30) to ensure content coverage of all important clinical concepts in patients with higher-risk (HR) MDS, low-blast count (LB) AML, and CMML, thus, improving the instrument's ability to detect clinically meaningful treatment benefit for this context of use.

Methods: Our mixed methods approach comprised literature review, clinician consultation (n = 3), and qualitative and quantitative analysis of two stages of patient interview data (n = 14, n = 18) to select library bank items to supplement a generic cancer PRO, the EORTC QLQ-C30.

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Background And Objective: The 12-item Multiple Sclerosis Walking Scale (MSWS-12) is a patient-reported outcome instrument that quantifies the progressive loss of walking ability from the patient perspective. However, previous psychometric analyses indicated floor and ceiling effects across the multiple sclerosis severity spectrum. This study aimed to address floor effects by creating a gait module that can be used in conjunction with the MSWS-12 for better measurement of treatment benefit in the higher functioning multiple sclerosis population.

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Objective: Acute intermittent porphyria is a rare metabolic disorder that affects heme synthesis. Patients with acute intermittent porphyria may experience acute debilitating neurovisceral attacks that require frequent hospitalizations and negatively impact quality of life. Although clinical aspects of acute intermittent porphyria attacks have been documented, the experience of patients is not well known, particularly for those more severely affected patients who experience frequent attacks.

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Background: ABILHAND, a manual ability patient-reported outcome instrument originally developed for stroke patients, has been used in multiple sclerosis clinical trials; however, psychometric analyses indicated the measure's limited measurement range and precision in higher-functioning multiple sclerosis patients.

Objective: The purpose of this study was to identify candidate items to expand the measurement range of the ABILHAND-56, thus improving its ability to detect differences in manual ability in higher-functioning multiple sclerosis patients.

Methods: A step-wise mixed methods design strategy was used, comprising two waves of patient interviews, a combination of qualitative (concept elicitation and cognitive debriefing) and quantitative (Rasch measurement theory) analytic techniques, and consultation interviews with three clinical neurologists specializing in multiple sclerosis.

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Background: Study objectives were to evaluate the Multiple Sclerosis Impact Scale (MSIS-29) and explore an optimized scoring structure based on empirical post-hoc analyses of data from the Phase III ADVANCE clinical trial.

Methods: ADVANCE MSIS-29 data from six time-points were analyzed in a sample of patients with relapsing-remitting multiple sclerosis (RRMS). Rasch Measurement Theory (RMT) analysis was undertaken to examine three broad areas: sample-to-scale targeting, measurement scale properties, and sample measurement validity.

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A clinician-reported outcome (ClinRO) assessment is a type of clinical outcome assessment (COA). ClinRO assessments, like all COAs (patient-reported, observer-reported, or performance outcome assessments), are used to 1) measure patients' health status and 2) define end points that can be interpreted as treatment benefits of medical interventions on how patients feel, function, or survive in clinical trials. Like other COAs, ClinRO assessments can be influenced by human choices, judgment, or motivation.

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Article Synopsis
  • Macrophage migration inhibitory factor (MIF) and d-dopachrome tautomerase (DDT) are key pro-inflammatory cytokines that regulate immune responses, with DDT sharing similarities with MIF.
  • A study involving 307 subjects found that both MIF and DDT levels are significantly higher in fetuses and newborns, peaking around postnatal day 4 before declining to adult levels.
  • The research indicates a strong correlation between MIF and DDT concentrations across all ages and suggests that lower levels in very preterm infants may increase risks for conditions like bronchopulmonary dysplasia.
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An outcome assessment, the patient assessment used in an endpoint, is the measuring instrument that provides a rating or score (categorical or continuous) that is intended to represent some aspect of the patient's health status. Outcome assessments are used to define efficacy endpoints when developing a therapy for a disease or condition. Most efficacy endpoints are based on specified clinical assessments of patients.

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There are two competing views on the mechanisms underlying the generation of visual evoked potentials/fields in EEG/MEG. The classical hypothesis assumes an additive wave on top of background noise. Another hypothesis states that the evoked activity can totally or partially arise from a phase resetting of the ongoing alpha rhythm.

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Recently published articles have described criteria to assess qualitative research in the health field in general, but very few articles have delineated qualitative methods to be used in the development of Patient-Reported Outcomes (PROs). In fact, how PROs are developed with subject input through focus groups and interviews has been given relatively short shrift in the PRO literature when compared to the plethora of quantitative articles on the psychometric properties of PROs. If documented at all, most PRO validation articles give little for the reader to evaluate the content validity of the measures and the credibility and trustworthiness of the methods used to develop them.

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