The Development of a New International Generic Measure (EQ-HWB): Face Validity and Psychometric Stages in Argentina

Comparing the Measurement Properties of the Preliminary Version of the EuroQol Health and Well-Being and EQ-5D-5L in Patients, Healthy General Public, and Caregivers

OBJECTIVES

The EuroQol Health and Well-Being (EQ-HWB) is a new generic quality of life (QOL) questionnaire to capture broader aspects of health and well-being than EQ-5D-5L. This study examined the measurement properties of the preliminary EQ-HWB version in patients, healthy individuals, and healthy caregivers.

METHODS

Respondents (1) with or without caregiver tasks, (2) with different diseases, or (3) in full health were recruited online. Ceiling effects, convergent and divergent validity, known disease, and caregiver group differences were explored, and an exploratory factor analysis was used.

RESULTS

A total of 500 respondents were recruited, including 100 healthy individuals (excluding 40 healthy caregivers), 122 with chronic hepatitis B, 101 with HIV/AIDS, 107 with depression, and 90 with generalized anxiety disorder. The EQ-HWB activities dimension correlated most highly with the EQ-5D-5L mobility, self-care, and usual activities dimensions, whereas EQ-HWB physical sensation dimension was strongly related to the EQ-5D-5L pain/discomfort dimension. Additional EQ-HWB dimensions (self-identity, cognition, autonomy, feelings and emotions, and relationships) aligned most closely with the EQ-5D-5L anxiety/depression dimension. Both instruments differentiated disease burden across healthy individuals and patients and identified caregiving roles. The EQ-5D-5L revealed 3 factors in exploratory factor analysis, whereas the EQ-HWB included 2 additional factors (F1 cognition, F2 physical activity, F3 feelings and emotions, F4 positive items, and F5 physical sensation).

CONCLUSIONS

EQ-HWB is able to measure health-related QOL in healthy people, patients, and caregivers given that it shares the same conceptual structure with EQ-5D. EQ-HWB is more sensitive in patients with mental health conditions than the EQ-5D. These results support that EQ-HWB captures well-being alongside health-related QOL.

Associations between financial toxicity, health-related quality of life, and well-being in Indonesian patients with breast cancer

OBJECTIVES

Financial toxicity (FT) is the impairment of financial well-being experienced by patients with cancer, categorized into subjective (SFT) and objective (OFT) forms. This study aimed to investigate the associations between FT, health-related quality of life, and overall well-being in patients with breast cancer.

METHODS

We analyzed baseline data from a single-center longitudinal study in Indonesia. Patients completed the EQ-5D-5L, EQ Health and Wellbeing (EQ-HWB), COST: A FACIT Measure of Financial Toxicity (FACIT-COST, for measuring SFT), and OFT-related questions. Ordinal logistic regression was used to examine the associations between FT and selected EQ-5D-5L and EQ-HWB items. Multivariable linear regression was used to assess the associations of FT and EQ-5D-5L and EQ-HWB-S index values. The main regression models were adjusted for socio-demographic and clinical factors such as age, income, metastasis status, and symptoms.

RESULTS

The survey included 300 female patients with breast cancer undergoing treatment (mean age = 51). Overall, 21% experienced high SFT (FACIT-COST ≤ 17.5) and 51% reported any OFT (e.g., incurring debt). Adjusted for covariates, higher SFT was associated with more problems in EQ-5D-5L pain/discomfort and anxiety/depression, and in EQ-HWB exhaustion, anxiety, sadness/depression, frustration, pain, and discomfort. OFT was associated with more problems in exhaustion. Higher SFT was associated with lower EQ-5D-5L and EQ-HWB-S index values, with explained variances of 46.3% for EQ-HWB-S and 31.2% for EQ-5D-5L.

CONCLUSIONS

This study is the first to explore the associations between financial toxicity, EQ-5D-5L, and EQ-HWB outcomes in breast cancer. Our findings provide insight into the cancer burden and its link to health and well-being.

Can items derived from international literature be used in national quality of life instruments? A qualitative study conceptualising the EQ-HWB in China

INTRODUCTION

The EQ Health and Wellbeing (EQ-HWB) is a new questionnaire for measuring quality of life (QoL) from a broad perspective. The items of the EQ-HWB were derived based on a 'qualitative review' of literature, which reported primarily on Western studies. It can be argued that the QoL is a cultural-related concept and therefore people from China have a different understanding of the QoL. This study aimed to explore whether Chinese citizens could understand the EQ-HWB's candidate items and what they thought of those items. In doing so, we wanted to examine the face validity of the candidate items and explore if further cultural adaptation is necessary.

METHODS

This research was part of the E-QALY project, in which 36 candidate items were selected for the EQ-HWB from a 97-item pool. In China, three interviewers investigated the face validity of these EQ-HWB candidate items in semi-structured qualitative face-to-face interviews. Respondents were invited to report 'problems' with regard to the interpretation of the items and these problems were grouped into themes. We explored to what extent those themes related to specific cultural aspects in China. We also classified the rates of reported problems for each item into three groups: 1) less than 20%, 2) from 20-50%, and 3) over 50%.

RESULTS

For 17 items the rate of reported problems was less than 20%, 15 items fell into the second group (with 20 - 50%) and for 4 items the rate of problems reported was more than 50%. The thematic analysis revealed eight themes: ambiguous problems in the interpretation of 16 items; difficult to understand (11); contained a complex negative expression (10); examples used seemed inappropriate (7); misleading connotation in Chinese (2); long and complex (2); complex response options (1); and use of non-colloquial language (1).

DISCUSSION

Our research shows that EQ-HWB candidate items require careful examination to make them more comprehensible. Most of the reported problem themes were generic problems related to the items, and only a few face validity issues appeared to relate to specific cultural aspects in China, even though most of the items were based on Western studies. Our findings are reassuring for the instrument's international application, especially in China.

Health Fluctuations in Dementia and its Impact on the Assessment of Health-Related Quality of Life Using the EQ-5D-5L

OBJECTIVES

To quantify health fluctuations, identify affected health-related quality of life (HRQoL) dimensions, and evaluate if fluctuations affect the HRQoL instruments recall period adherence in people living with dementia (PlwD).

METHODS

Caregivers of PlwD completed a daily diary for 14 days, documenting if PlwD's health was better or worse than the day before and the affected HRQoL dimensions. Health fluctuation was categorized into low (0-4 fluctuations in 14 days), moderate (5-8), and high (9-14). Also, caregivers and PlwD completed the EQ-5D-5L (proxy- and self-reported) on days 1, 7, and 14. Subsequently, caregivers were interviewed to determine whether recurrent fluctuations were considered in the EQ-5D-5L assessment of today's health (recall period adherence).

RESULTS

Fluctuations were reported for 96% of PlwD, on average, for 7 of the 14 days. Dimensions most frequently triggering fluctuations included memory, mobility, concentration, sleep, pain, and usual activities. Fluctuations were associated with higher EQ-5D-5L health-states variation and nonadherence to the EQ-5D-5L recall period "today." PlwD with moderate to high fluctuation had the highest EQ-5D-5L utility change between day 1 and 14 (0.157 and 0.134) and recall period nonadherence (31% and 26%) compared with PlwD with low fluctuation (0.010; 17%). Recall period nonadherence was higher in PlwD with improved compared with those with deteriorated health in the diary (37% vs 9%).

CONCLUSIONS

Health fluctuations frequently occur in dementia and strongly affect HRQoL assessments. Further research is needed to evaluate if more extended recall periods and multiple, consecutive assessments could capture health fluctuations more appropriately in dementia.

Content validity of the EQ-HWB and EQ-HWB-S in a sample of Italian patients, informal caregivers and members of the general public

BACKGROUND

The EuroQol Group recently developed two new instruments, the EQ Health and Wellbeing (EQ-HWB) and the EQ Health and Wellbeing short version (EQ-HWB-S). The EQ-HWB and EQ-HWB-S are intended to capture a broad range of health and broader quality of life aspects, which may be relevant to general public members, patients, their families, social care users and informal carers. This study assesses the content validity of the Italian version of the two instruments in a sample of Italian patients, social care users and informal carers.

METHODS

Participants were recruited using a convenience sampling approach. One-on-one interviews were carried out using video-conferencing interviews. A semi-structured topic guide was used to guide the interview procedures, with open-ended questions supplemented by probes. Participants were asked to explain important aspects of their health and quality of life, to complete the questionnaires and verbalize their thoughts.

RESULTS

Twenty participants comprising of patients (n = 9), informal carers (n = 6), and members of the general public (n = 5) participated to the study. Content validity was summarized into six main themes: comprehension, interpretation, acceptability, relevance, response options and recall period. All participants found the instruments easy or quite easy to understand and to respond to. Items were relevant for all three groups of participants, and response options appropriate.

CONCLUSIONS

The Italian version of the EQ-HWB showed content validity in measuring health and wellbeing in a mixed Italian population.

The EQ-HWB: Overview of the Development of a Measure of Health and Wellbeing and Key Results

OBJECTIVES

Existing measures for estimating quality-adjusted life-years are mostly limited to health-related quality of life. This article presents an overview of the development the EQ-HWB (EQ Health and Wellbeing), which is a measure that encompasses health and wellbeing.

METHODS

Stages: (1) Establishing domains through reviews of the qualitative literature informed by a conceptual framework. (2) Generation and selection of items to cover the domains. (3) Face validation of these items through qualitative interviews with 168 patients, social care users, general population, and carers across 6 countries (Argentina, Australia, China, Germany, United Kingdom, United States). (4) Extensive psychometric testing of candidate items (using classical, factor analysis, and item response theory methods) on > 4000 respondents in the 6 countries. Stakeholders were consulted throughout.

RESULTS

A total of 32 subdomains grouped into 7 high-level domains were identified from the qualitative literature and 97 items generated to cover them. Face validation eliminated 36 items, modified 14, and added 3. Psychometric testing of 64 items found little difference in missing data or problems with response distribution, the conceptual model was confirmed except in China, and most items performed well in the item response theory in all countries. Evidence was presented to stakeholders in 2 rounds of consultation to inform the final selection of items for the EQ-HWB (25-item) and the short version of EQ-HWB (9-items).

CONCLUSIONS

EQ-HWB measures have been developed internationally for evaluating interventions in health, public health, and social care including the impact on patients, social care users, and carers.