Translation and content validity of the Dutch Impact of Vision Impairment questionnaire assessed by Three-Step Test-Interviewing

Refinement and Validation of the Empowerment Audiology Questionnaire: Rasch Analysis and Traditional Psychometric Evaluation

OBJECTIVES

Empowerment is the process through which individuals with hearing-related challenges acquire and use knowledge, skills and strategies, and increase self-efficacy, participation, and control of their hearing health care, hearing solutions, and everyday lives. The aim was to refine and validate the Empowerment Audiology Questionnaire (EmpAQ), a hearing-specific measure of empowerment. This was achieved through (1) refinement via Rasch analysis (study 1), and (2) traditional psychometric analysis of the final survey structure (study 2).

DESIGN

In study 1, 307 adult hearing aid owners completed the initial empowerment measure (33 items) online. To inform an intended item reduction, Rasch analysis was used to assess a range of psychometric properties for individual items. The psychometric properties included analysis of individual items (e.g., response dependency, fit to the polytomous Rasch model, threshold ordering) and the whole EmpAQ (e.g., dimensionality). Item reduction resulted in a 15-item version (EmpAQ-15) and a short-form 5-item version (EmpAQ-5), validated using modern (Rasch), and traditional (Classical Test Theory) psychometric analysis (study 2). In study 2, 178 adult hearing aid owners completed the EmpAQ-15 and EmpAQ-5, alongside 5 questionnaires to measure related constructs. These included two hearing-specific questionnaires (Social Participation Restrictions Questionnaire and Self-Assessment of Communication), two general health-related questionnaires (Patient Activation Measure and World Health Organization Disability Assessment Schedule 2.0), and a general empowerment questionnaire (Health Care Empowerment Questionnaire). Modern (Rasch) and traditional psychometric analysis techniques (internal consistency, construct validity, and criterion validity) were used to assess the psychometric properties of the EmpAQ-15 and EmpAQ-5.

RESULTS

Rasch analysis of the initial 33-item measure of empowerment identified 18 items with high response dependency, poor fit to the Rasch model, and threshold disordering, which were removed, resulting in a long-form (EmpAQ-15) hearing-specific measure of empowerment. A short-form (EmpAQ-5) version was developed for use in the clinic setting. Validation of the two EmpAQ measures using Rasch analysis showed good item fit to the Rasch model, appropriate threshold targeting, and the existence of unidimensionality. Traditional psychometric evaluation showed that both questionnaires had high internal consistency and positive correlations with the hearing-specific questionnaires. However, in contrast with our hypotheses, correlations with general health questionnaires were stronger than with hearing-specific questionnaires; all questionnaires were correlated with the EmpAQ and in the direction hypothesized. Taken together, these findings support the construct validity of the EmpAQ-15 and EmpAQ-5.

CONCLUSIONS

The EmpAQ-15 and EmpAQ-5 are the first self-report measures to be developed specifically for the measurement of empowerment. The EmpAQ-15 and EmpAQ-5 were found to meet the Rasch model criteria for interval-level measurements. Traditional psychometric evaluation supports the construct validity of both measures. The EmpAQ measures have the potential to be used in both research and clinical practice to evaluate empowerment along the hearing journey. The next stage of this research will be to further validate these measures by assessing their responsiveness, minimal clinically important difference, and clinical interpretability in a clinical population.

Perspectives of Patients and Professionals on Implementing a Computer Adaptive Vision-Related Quality of Life Outcome (CAT-EyeQ) in Clinical Practice

Purpose

The CAT-EyeQ is a computer adaptive test (CAT) which measures vision-related quality of life in patients having exudative retinal diseases. The aim of this study is to investigate the usability of the CAT-EyeQ in clinical practice and identify potential barriers and facilitators for implementation (problem analysis).

Methods

Patients and health care professionals participated in the study regarding the usability of the CAT-EyeQ, and clinic managers and health care professionals were included in the problem analysis for implementation. In total, we conducted 18 semi-structured interviews. The Consolidated Framework for Implementation Research (CFIR) was used to develop the interview guides and to structure results.

Results

Six themes were derived from the usability study and problem analysis: (1) quality of the CAT-EyeQ and the applicability to patients' needs and preferences, (2) embedding the CAT-EyeQ in current practice, (3) implementation climate of the eye hospitals, (4) attitude of professionals, (5) engaging and encouraging professionals, and (6) integration of the CAT-EyeQ in health care - needs after piloting.

Conclusions

Patients and professionals mentioned that the CAT-EyeQ improved insight into the impact of eye diseases on a patient's daily life, it allowed for more attention on the patient perspective and the structured measurement of vision-related quality of life. The main perceived barriers mentioned by professionals for using the CAT-EyeQ were lack of time and the integration of the patient-reported outcome measure (PROM) results within the electronic patient record (EPR).

Translational Relevance

The CAT-EyeQ, accompanied by an overview of stakeholder perspectives resulting from this implementation study, can now be used in clinical practice.

Vision-Related Quality of Life in Patients with Systemic Lupus Erythematosus

PURPOSE

To assess vision-related quality of life (VRQoL) in patients with systemic lupus erythematosus (SLE) under treatment with hydroxychloroquine (HCQ), and to find the influencing factors.

METHODS

Cross-sectional study enrolling SLE patients for less than ten years (Group 1), SLE patients for more than ten years (Group 2), and healthy controls (Group 3). SLE patients should be under treatment with HCQ but without ophthalmological affection. Schirmer test, best-corrected visual acuity (BCVA), axial length (AL) with optical biometry, and swept-source optical coherence tomography-angiography (OCTA) Triton (Topcon) were performed. All participants fulfilled the Impact of Visual Impairment questionnaire, and SLE patients answered the Lupus Impact Tracker (LIT) questionnaire. Additional data were obtained from clinical records.

RESULTS

A totals of 41 eyes (41 patients), 31 eyes (31 patients) and 45 eyes (45 volunteers) were enrolled in the study groups. The mean ages were 41.09 ± 9.56, 45.06 ± 8.47 and 40.25 ± 10.83 years, respectively (p = 0.10). The LIT outcomes were 33.49 ± 20.74 and 35.98 ± 22.66 (p = 0.63), respectively. Group 3 referred to a better VRQoL than Group 2 in all categories and than Group 1 in some of them. A linear regression analysis showed that serum ferritin, SLE activity scales, body-mass index (BMI), age, and BCVA influenced VRQoL. The LIT questionnaire was correlated to two categories of the Impact of Visual Impairment questionnaire (IVI).

CONCLUSIONS

Despite no ophthalmological affection, SLE patients refer to poorer VRQoL because of disease activity and a low health-related quality of life, which has a negative influence on VRQoL. This masks the effect of other ophthalmological conditions such as dry eyes. Other variables influencing VRQoL are age and BMI, and BCVA, to a lesser extent.

Valuing selected WAItE health states using the Time Trade-Off methodology: findings from an online interviewer-assisted remote survey

PURPOSE

The Weight-Specific Adolescent Instrument for Economic Evaluation (WAItE) is a physical weight-specific patient reported outcome measure for use in adolescence. The purpose of this study was to use the Time Trade-Off (TTO) methodology, administered using an online interviewer-assisted remote survey, to obtain utility values for several health states from the WAItE descriptive system from a sample of the UK adult general population.

METHODS

The adult sample was gathered using a market research company and a sample of local residents. All participants completed the same interviewer-assisted remote survey, which included rating WAItE states of varying impairment using the TTO.

RESULTS

42 adults completed the survey. Utility values were gathered for four health states, ranging from low impairment to the most severe health from the WAItE descriptive system (the Pits state). Consistent orderings of the WAItE health states were observed; the health state with the lowest level of impairment was valued highest and the Pits state was valued lowest. Several respondents (n = 7, 17%) considered the Pits state to be worse than death; however, the mean value of this health state was 0.23.

CONCLUSIONS

The utility value of the Pits state relative to death generated from this study will be used to anchor latent values for WAItE health states generated from a Discrete Choice Experiment onto the 0 = death, 1 = full health Quality Adjusted Life Year (QALY) scale as part of a valuation study for the WAItE in the UK population. This study also provides further evidence that interviewer-assisted digital studies are feasible for collecting TTO data.

Self-reported visual function and psychosocial impact of visual loss in EYS-associated retinal degeneration in a Portuguese population

PURPOSE

To evaluate self-reported visual function and the psychosocial impact of visual loss EYS-associated retinal degeneration (EYS-RD) using two patient-reported outcome (PRO) measures: Michigan Retinal Degeneration Questionnaire (MRDQ) and Michigan Vision-related Anxiety Questionnaire (MVAQ).

METHODS

Cross-sectional, single-center study conducted at a tertiary care hospital in Portugal. Patients with biallelic EYS variants were invited to participate. Clinical data including demographics, ETDRS best-corrected visual acuity (BCVA) in the better-seeing eye and genetic testing results were collected. Interviews were carried out during clinic visits or by phone between November 2021 and February 2022. A blind grader used horizontal and vertical spectral domain optical coherence tomography (SD-OCT) scans to manually measure ellipsoid zone (EZ) width in the nasal, temporal, superior and inferior macular quadrants to calculate the EZ area.

RESULTS

Forty-nine patients (53.1% males; mean age 53 ± 14 years) were included. A positive correlation (p < .05) was found between age and most MRDQ domain scores (central vision, color vision, contrast sensitivity, scotopic function, photopic peripheral vision and mesopic peripheral vision). A negative correlation was found between both BCVA and EZ area across all MRDQ domains. In MVAQ, SD-OCT EZ area negatively correlated with both rod function and cone function-related anxiety. Neither age, BCVA or gender correlated with MVAQ domains.

CONCLUSIONS

This study provides strong evidence supporting a correlation between PRO measures and both functional and structural clinician-reported outcomes. The use of MRDQ and MVAQ adds a new dimension to our understanding of EYS-RD and establishes both PRO measures as important disease outcome measures.

How Are Albertans "Adjusting to and Coping With" Dialysis? A Cross-Sectional Survey

Background:

Depression and anxiety are commonly reported (40% and 11%-52%) among adults receiving dialysis, compared with ~10% among all Canadians. Mental health in dialysis care is underrecognized and undertreated.

Objective:

(1) To describe preferences for mental health support reported by Albertans receiving dialysis; (2) to compare depression, anxiety, and quality-of-life (QOL) domains for people who would or would not engage in support for mental health; and (3) to explore sociodemographic, mental health, and QOL domains that explain whether people would or would not engage in support for mental health.

Design:

A cross-sectional survey.

Setting:

Alberta, Canada.

Patients:

Adults receiving all modalities of dialysis (N = 2972).

Measurements:

An online survey with questions about preferences for mental health support and patient-reported outcome measures (Patient Health Questionnaire–9 [PHQ-9], Generalized Anxiety Disorder–7 [GAD-7], and Kidney Disease QOL Instrument–36 [KDQOL-36]).

Methods:

To address objectives 1 and 2, we conducted chi-square tests (for discrete variables) and t tests (for continuous variables) to compare the distributions of the above measures for two groups: Albertans receiving dialysis who would engage or would not engage in support for mental health. We subsequently conducted a series of binary logistic regressions guided by the purposeful variable selection approach to identify a subset of the most relevant explanatory variables for determining whether or not people are more likely to engage in support for mental health (objective 3). To further explain differences between the two groups, we analyzed open-text comments following a summative content analysis approach.

Results:

Among 384 respondents, 72 did not provide a dialysis modality or answer the PHQ-9. The final data set included responses from 312 participants. Of these, 59.6% would consider engaging in support, including discussing medication with a family doctor (72.1%) or nephrologist (62.9%), peer support groups (64.9%), and talk therapy (60%). Phone was slightly favored (73%) over in person at dialysis (67.6%), outpatient (67.2%), or video (59.4%). Moderate to severe depressive symptoms (PHQ-9 score ≥10) was reported by 33.4%, and most respondents (63.9%) reported minimal anxiety symptoms; 36.1% reported mild to severe anxiety symptoms (GAD-7 score ≥5). The mean (SD) PHQ-9 score was 8.9 (6.4) for those who would engage in support, and lower at 5.8 (4.8) for those who would not. The mean (SD) GAD-7 score was 5.2 (5.6) for those who would engage in support and 2.8 (4.1) for those who would not. In the final logistic regression model, people who were unable to work had 2 times the odds of engaging in support than people who are able to work. People were also more likely to engage in support if they had been on dialysis for fewer years and had lower (worse) mental health scores (odds ratios = 1.06 and 1.38, respectively). The final model explained 15.5% (Nagelkerke R²) of the variance and with 66.6% correct classification. We analyzed 146 comments in response to the question, “Is there anything else you like to tell us.” The top 2 categories for both groups were QOL and impact of dialysis environment. The third category differed: those who would engage wrote about support, whereas those who would not engage wrote about “dialysis is the least of my worries.”

Limitations:

A low response rate of 12.9% limits representativeness; people who chose not to participate may have different experiences of mental health.

Conclusions:

Incorporating patients’ preferences and willingness to engage in support for mental health will inform future visioning for person-centered mental health care in dialysis.

Health-Related Quality of Life According to Sociodemographic Characteristics in the South Korean Population

Health-related quality of life (HRQoL) concerns satisfaction with life and happiness with regard to physical, mental, and social factors. RAND-36 is a publicly available, self-administered questionnaire that examines eight health dimensions. This study evaluated the HRQoL of the South Korean population using the RAND-36 questionnaire and compared HRQoL across sociodemographic characteristics. From May 2015 to May 2019, South Koreans who visited public places aged 19−80 years were recruited and the RAND-36 questionnaire was administered. Overall, 1002 participants were recruited (mean age 45.34 years, 52% men). Men scored better than women in both physical and mental health (p < 0.05). There were significant differences in bodily pain (p < 0.05), general health perception (p < 0.05), and energy/fatigue (p < 0.05) dimensions according to the participants’ health condition. The HRQoL of South Koreans was lower than average in most dimensions compared with other countries. As the first study to assess this, its data can be used in future studies that apply RAND-36 to evaluate the HRQoL of diseased individuals, as they can compare their findings with those of our study population.

Predictors of vision-related quality of life in patients with macular oedema receiving intra-vitreal anti-VEGF treatment

PURPOSE

To determine which demographic and clinical characteristics are predictive of vision-related quality of life (VrQoL) and quality of life (QoL) in patients with macular oedema receiving intravitreal anti-vascular endothelial growth factor (VEGF) treatment.

METHODS

Vision-related quality of life (VrQoL) and quality of life (QoL) were measured in 712 patients with retinal exudative disease receiving anti-VEGF treatment at baseline, 6 and 12 months. VrQoL was measured using an item-response theory based 47-question item bank (EyeQ), whereas QoL was measured using the EuroQol Five Dimensions (EQ-5D) questionnaire. The EQ-5D score was dichotomized into a perfect score of 1 and a suboptimal score of <1. Demographic and clinical patient characteristics were considered as possible predictors of (Vr)QoL. Prediction models for (Vr)QoL were created with linear mixed models and generalised estimating equations, using a forward selection procedure.

RESULTS

A worse VrQoL was predicted by poorer LogMAR visual acuity of the better eye, female sex, single civil status, older age, longer length of anti-VEGF treatment at baseline and the presence of non-ocular and ocular comorbidities. Suboptimal EQ-5D scores were predicted by poorer LogMAR visual acuity of the better eye, female sex, single civil status, older age, the presence of non-ocular comorbidities and a lower educational background.

CONCLUSIONS

Along with visual acuity of the better eye, which is the main factor used in clinical decision making, other patient characteristics should also be considered for the risk assessment of (Vr)QoL, such as sex, age, civil status, comorbidities and length of anti-VEGF treatment.

Calibration of the Dutch EyeQ to Measure Vision Related Quality of Life in Patients With Exudative Retinal Diseases

Purpose

This study aims to develop an item-bank to measure vision-related quality of life (Vr-QoL) and subsequently calibrate this set of items.

Methods

Three Vr-QoL instruments were searched for suitable items to be added in the EyeQ. Patients who received antivascular endothelial growth factor treatment for various retinal diseases involving macular edema were included in the study and completed the 47-item EyeQ. Item response theory (IRT) was used to calibrate the EyeQ items, which was performed multiple times in subsets as a novel approach, containing 80% of the data. Differential item functioning (DIF) was evaluated for various variables.

Results

Responses of 704 patients were used in analysis. One item violated the local independence IRT-assumption and showed a high percentage of missing values, after which this item was deleted from the item-bank. The data of the five subsets fitted the graded response model adequately, and no DIF was detected for items between subsets, after which mean item parameters were calculated. Item fit statistics were found to be good. DIF was detected for gender, age, and administration mode by the patient (independently vs. with help), this involved three items, which all showed negligible impact on total scores.

Conclusions

Because of separate calibrations of the EyeQ in multiple subsets, a high robustness of item parameters is expected.

Translational Relevance

The calibrated EyeQ can now be used for the assessment of Vr-QoL in patients suffering from exudative retinal diseases and is promising for use as a computer adaptive test.

Measuring the Patient Experience in Rare Disorders: Benefit of Pragmatic Mixed-Methods Research in NUT Carcinoma

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. The published literature on NUTca is scarce. The limited number of case reports focus primarily on the clinical development and presentation of tumors. Currently, there are no publications describing the patient experience of NUTca and no specific PRO measures to assess the patient experience. We conducted mixed-methods research, including concept elicitation interviews, cognitive debriefing, and quantitative data analyses, to fill this evidence gap and describe challenges and solutions in the context of NUTca.

Methods

As published previously, our conceptualization of NUTca was based on elicitation interviews with 27 participants (n = 10 patients; n = 17 caregivers) using a semi-structured format; this framework formed the basis for a bolt-on strategy to develop a bespoke PRO measure based on the EORTC QLQ-C30, supplemented by targeted items from the EORTC Item Library and new items. In this publication, 20 participants were interviewed (n = 10 patients; n = 10 caregivers) to debrief items. Given the variety of tumor locations and related symptoms, and the small sample of patients providing responses to location-specific symptom items, we used response option endorsement frequencies to illuminate the variability of response for the concepts measured.

Results

This study highlights the challenges in implementing patient-centric research to inform and develop PRO measures in rare diseases.

Conclusions

Our mixed-methods research used pragmatic solutions to collect patient experience data and provides an evidence base to inform PCOM in clinical programs in this rapidly progressing rare cancer with high unmet need.

Supplementary Information

The online version contains supplementary material available at 10.1007/s40487-022-00192-6.

Symptoms and impacts of nonsense mutation Duchenne muscular dystrophy at different stages of ambulation

Aim: To describe the experience of nonsense mutation Duchenne muscular dystrophy (DMD) across different health states in the DMD natural history model. Materials and methods: Qualitative interviews were conducted with UK caregivers (n = 10) of individuals with nonsense mutation DMD treated with ataluren. Results: Interviews were conducted with caregivers of individuals in the early ambulatory (n = 6), late ambulatory (n = 3) and transfers (n = 3) health states. Increasing health state severity was related to decreased physical function, which impacted daily and social activities, emotional well-being and caregiver burden. Conclusion: Declining physical function can impair daily life and impact the health-related quality of life of individuals and their caregivers. Delaying progression between health states has the potential to prevent loss of function and decline in health-related quality of life.