scholarly journals A Web-Based Adaptation of the Quality of Life in Bipolar Disorder Questionnaire: Psychometric Evaluation Study

10.2196/17497 ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. e17497 ◽  
Author(s):  
Emma Morton ◽  
Sharon HJ Hou ◽  
Oonagh Fogarty ◽  
Greg Murray ◽  
Steven Barnes ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Bipolar Disorder ◽  
Factor Analysis ◽  
Psychometric Properties ◽  
Factor Structure ◽  
Internal Consistency ◽  
Original Study ◽  
Web Based ◽  
The Web

Background Quality of life (QoL) is considered a key treatment outcome in bipolar disorder (BD) across research, clinical, and self-management contexts. Web-based assessment of patient-reported outcomes offer numerous pragmatic benefits but require validation to ensure measurement equivalency. A web-based version of the Quality of Life in Bipolar Disorder (QoL.BD) questionnaire was developed (QoL Tool). Objective This study aimed to evaluate the psychometric properties of a web-based QoL self-report questionnaire for BD (QoL Tool). Key aims were to (1) characterize the QoL of the sample using the QoL Tool, (2) evaluate the internal consistency of the web-based measure, and (3) determine whether the factor structure of the original version of the QoL.BD instrument was replicated in the web-based instrument. Methods Community-based participatory research methods were used to inform the development of a web-based adaptation of the QoL.BD instrument. Individuals with BD who registered for an account with the QoL Tool were able to opt in to sharing their data for research purposes. The distribution of scores and internal consistency estimates, as indicated by Cronbach alpha, were inspected. An exploratory factor analysis using maximum likelihood and oblique rotation was conducted. Inspection of the scree plot, eigenvalues, and minimum average partial correlation were used to determine the optimal factor structure to extract. Results A total of 498 people with BD (349/498, 70.1% female; mean age 39.64, SD 12.54 years; 181/498, 36.3% BD type I; 195/498, 39.2% BD type II) consented to sharing their QoL Tool data for the present study. Mean scores across the 14 QoL Tool domains were, in general, significantly lower than that of the original QoL.BD validation sample. Reliability estimates for QoL Tool domains were comparable with that observed for the QoL.BD instrument (Cronbach alpha=.70-.93). Exploratory factor analysis supported the extraction of an 11-factor model, with item loadings consistent with the factor structure suggested by the original study. Findings for the sleep and physical domains differed from the original study, with this analysis suggesting one shared latent construct. Conclusions The psychometric properties of the web-based QoL Tool are largely concordant with the original pen-and-paper QoL.BD, although some minor differences in the structure of the sleep and physical domains were observed. Despite this small variation from the factor structure identified in the QoL.BD instrument, the latent factor structure of the QoL Tool largely reproduced the original findings and theoretical structure of QoL areas relevant to people with BD. These findings underscore the research and clinical utility of this instrument, but further comparison of the psychometric properties of the QoL Tool relative to the QoL.BD instrument is warranted. Future adaptations of the QoL Tool, including the production of an app-based version of the QoL Tool, are also discussed.

scholarly journals A Web-Based Adaptation of the Quality of Life in Bipolar Disorder Questionnaire: Psychometric Evaluation Study (Preprint)

2019 ◽  
Author(s):  
Emma Morton ◽  
Sharon HJ Hou ◽  
Oonagh Fogarty ◽  
Greg Murray ◽  
Steven Barnes ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Bipolar Disorder ◽  
Factor Analysis ◽  
Psychometric Properties ◽  
Factor Structure ◽  
Internal Consistency ◽  
Original Study ◽  
Web Based ◽  
The Web

BACKGROUND Quality of life (QoL) is considered a key treatment outcome in bipolar disorder (BD) across research, clinical, and self-management contexts. Web-based assessment of patient-reported outcomes offer numerous pragmatic benefits but require validation to ensure measurement equivalency. A web-based version of the Quality of Life in Bipolar Disorder (QoL.BD) questionnaire was developed (QoL Tool). OBJECTIVE This study aimed to evaluate the psychometric properties of a web-based QoL self-report questionnaire for BD (QoL Tool). Key aims were to (1) characterize the QoL of the sample using the QoL Tool, (2) evaluate the internal consistency of the web-based measure, and (3) determine whether the factor structure of the original version of the QoL.BD instrument was replicated in the web-based instrument. METHODS Community-based participatory research methods were used to inform the development of a web-based adaptation of the QoL.BD instrument. Individuals with BD who registered for an account with the QoL Tool were able to opt in to sharing their data for research purposes. The distribution of scores and internal consistency estimates, as indicated by Cronbach alpha, were inspected. An exploratory factor analysis using maximum likelihood and oblique rotation was conducted. Inspection of the scree plot, eigenvalues, and minimum average partial correlation were used to determine the optimal factor structure to extract. RESULTS A total of 498 people with BD (349/498, 70.1% female; mean age 39.64, SD 12.54 years; 181/498, 36.3% BD type I; 195/498, 39.2% BD type II) consented to sharing their QoL Tool data for the present study. Mean scores across the 14 QoL Tool domains were, in general, significantly lower than that of the original QoL.BD validation sample. Reliability estimates for QoL Tool domains were comparable with that observed for the QoL.BD instrument (Cronbach alpha=.70-.93). Exploratory factor analysis supported the extraction of an 11-factor model, with item loadings consistent with the factor structure suggested by the original study. Findings for the sleep and physical domains differed from the original study, with this analysis suggesting one shared latent construct. CONCLUSIONS The psychometric properties of the web-based QoL Tool are largely concordant with the original pen-and-paper QoL.BD, although some minor differences in the structure of the sleep and physical domains were observed. Despite this small variation from the factor structure identified in the QoL.BD instrument, the latent factor structure of the QoL Tool largely reproduced the original findings and theoretical structure of QoL areas relevant to people with BD. These findings underscore the research and clinical utility of this instrument, but further comparison of the psychometric properties of the QoL Tool relative to the QoL.BD instrument is warranted. Future adaptations of the QoL Tool, including the production of an app-based version of the QoL Tool, are also discussed.

scholarly journals Psychometric Properties and Factor Analysis of the Engagement and Independence in Dementia Questionnaire (EID-Q)

2018 ◽  
Vol 46 (3-4) ◽  
pp. 119-127 ◽  
Author(s):  
Charlotte R. Stoner ◽  
Martin Orrell ◽  
Aimee Spector
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Psychometric Properties ◽  
Internal Consistency ◽  
Social Engagement ◽  
Convergent Validity ◽  
Factor Solution ◽  
Adequate Model ◽  
People With Dementia

Background/Aims: Independence and social engagement are important outcomes for people with dementia. The aim of this study was to conduct an in-depth psychometric assessment of the Engagement and Independence in Dementia Questionnaire (EID-Q), a measure of social independence. Methods: This was an observational study at five NHS sites across England. Participants completed the EID-Q alongside additional measures. Psychometric analysis included internal consistency, test-retest reliability, convergent validity, and factor analyses. Results: A total of 225 people living with dementia completed the study. Internal consistency was excellent (α = 0.921) and the measure remained moderately stable over a 1-week period (ICC = 0.768). Significant correlations were observed between quality of life (r = 0.682) and depression (r = –0.741; both p < 0.001), indicating the importance of these concepts for wellbeing in dementia. Factor analysis indicated the presence of five factors which loaded onto a second order two-factor solution. These latent factors were named “sense of independence” and “social engagement.” Conclusions: The EID-Q demonstrated acceptable psychometric properties and the factor solution had an adequate model fit. The strong correlations suggest that social independence is strongly related to depression and quality of life. Future work will entail an analysis of responsiveness to intervention and further large-scale work.

scholarly journals Validation and Psychometric Properties of the Arabic Version of the Duke Anticoagulation Satisfaction Scale (DASS)

2020 ◽  
Vol 11 ◽  
Author(s):  
Maha AlAmmari ◽  
Khizra Sultana ◽  
Sattam Nawaf AlHarbi ◽  
Ashwag Saud Marenga ◽  
Abdulrahman AlTuraiki ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Psychometric Properties ◽  
Internal Consistency ◽  
Health Care Professionals ◽  
Negative Impact ◽  
Arabic Language ◽  
Arabic Version ◽  
Satisfaction Scale

Background: To assess the health-related quality of life (HRQoL) of oral anticoagulant therapy users, different types of instruments are available, either general or specific tools like Duke Anticoagulation Satisfaction Scale (DASS). These tools allow the clinician to adjust the treatment regimen to focus on increasing anticoagulation adherence and reduce adverse clinical outcomes. This study aims to validate the translated Arabic version of DASS to assess the satisfaction level of patients using oral anticoagulants in the Arab population.Methods: The Duke Anticoagulation satisfaction scale (DASS) was translated into the Arabic language using MAPI group services. DASS was administered to 505 patients receiving anticoagulation with warfarin or apixaban. The generic scale measuring the quality of life EQ-5D-5L was also administered. Psychometric properties were assessed by Confirmatory Factor Analysis, internal consistency (Cronbach’s Alpha), exploratory factor analysis, convergent and divergent validity, and the correlation between the DASS and demographic variables, clinical characteristics, and the EQ-5D-5L instrument.Results: 439 subjects answered all the questions. From a total of 25 items, 22 grouped into three factors (limitations, positive impact, and negative impact). Each factor had good internal consistency (Cronbach Alpha 0.78–0.88). All the three factors correlated consistently with EQ-5D-5L measuring generic quality of life.Conclusion: The psychometric properties of the Arabic DASS version were comparable to the original English version. The Arabic version of the DASS showed very good reliability and validity. It can be used by health care professionals in other settings of anticoagulation clinics to assess patient’s satisfaction and limitations to anticoagulant treatment.

scholarly journals Factor structure, measurement invariance and psychometric properties of the Quality of Life Scale WHOQOL-BREF in the Ecuadorian context

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Sandra Lima-Castro ◽  
Paúl Arias-Medina ◽  
Alexandra Bueno-Pacheco ◽  
Eva Peña-Contreras ◽  
Mónica Aguilar-Sizer ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Psychometric Properties ◽  
Measurement Invariance ◽  
Factor Structure ◽  
Convergent Validity ◽  
Graph Analysis ◽  
Confirmatory Factor ◽  
Correlated Factors

Abstract Background The short version of the World Health Organization Quality of Life questionnaire (WHOQOL-BREF) is a popular instrument used to assess quality of life. The objective of this study was to evaluate the following psychometric properties: structural validity, convergent validity, internal consistency, and measurement invariance across sex of the WHOQOL-BREF in a sample of Ecuadorian adults. Methods We used a sample of undergraduates (n = 987) to assess the WHOQOL-BREF original four-factor structure, a model with correlated factors, a hierarchical model, and two models resulting from the exploratory factor analysis and exploratory graph analysis. All the models were evaluated using confirmatory factor analysis. Results The results of the exploratory factor analysis and exploratory graph analysis suggest that the items are organized into four factors, although differently from the original version and the orthogonality assumption is not maintained. The confirmatory factor analysis shows that the original WHOQOL-BREF structure with correlated factors presents adequate psychometric properties. However, we propose a four-factor structure that has the best psychometric properties and adequate internal consistency. The results of the measurement invariance show that strict and strong invariance is achieved between men and women. Convergent validity analysis reveals moderate correlations with self-esteem, resilience, and social support. Conclusions Despite the original version of the WHOQOL-BREF with correlated factors has acceptable psychometric properties in the Ecuadorian context, we propose a version with a different organization of its items, which is consistent with the findings of other investigations.

scholarly journals Psychometric properties of the Glaucoma Quality of Life-15 questionnaire: Use of explanatory factor analysis

2018 ◽  
Vol 30 (3) ◽  
pp. 211-216 ◽  
Author(s):  
Hamideh Mahdaviazad ◽  
Narges Roustaei ◽  
Masoumeh Beigom Masoumpour ◽  
Mohammad Reza Razeghinejad
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Psychometric Properties ◽  
Explanatory Factor Analysis

scholarly journals The Spanish Family Quality of Life Scales under and over 18 Years Old: Psychometric Properties and Families’ Perceptions

2020 ◽  
Vol 17 (21) ◽  
pp. 7808
Author(s):  
Anna Balcells-Balcells ◽  
Joana M. Mas ◽  
Natasha Baqués ◽  
Cecilia Simón ◽  
Simón García-Ventura
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Psychometric Properties ◽  
Family Quality Of Life ◽  
Intellectual And Developmental Disabilities ◽  
Validity And Reliability ◽  
Confirmatory Factor ◽  
Spanish Family ◽  
Families With Children

Background: Family quality of life (FQoL), just like individual quality of life, has become a priority outcome in the policies and services received by persons with intellectual and developmental disabilities (IDD) and their families. Conceptualizing, measuring, and theorizing FQoL has been the object of investigation in recent decades. The goal of this paper is to present a revision of the Spanish Family Quality of Life Scales, the CdVF-E < 18 and the CdVF-E >18, and describe the FQoL of Spanish families with a member with IDD. Methods: The sample included a total of 548 families with a member under 18 years old and 657 families with a member over 18. Based on an Exploratory Factor Analysis (EFA) firstly and a Confirmatory Factor Analysis (CFA) secondly, the two scales’ psychometric properties were explored. Results: The CdVF-ER < 18 and the CdVF-ER > 18 comprise 5 dimensions, containing 35 and 32 items, respectively, and they show good validity and reliability. The families obtained a high FQoL score, although some differences exist between the dimensions on which families with children under and over 18 score highest and lowest. Conclusion: The characteristics of the revised scales facilitate their use by professionals, administrations, and services.

scholarly journals Development, initial validation and reliability testing of a web-based, generic feline health-related quality-of-life instrument

2018 ◽  
Vol 21 (2) ◽  
pp. 84-94 ◽  
Author(s):  
Cory E Noble ◽  
Lesley M Wiseman-Orr ◽  
Marian E Scott ◽  
Andrea M Nolan ◽  
Jacky Reid
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Correlation Coefficients ◽  
Health Related Quality ◽  
Web Based ◽  
Scoring Algorithm ◽  
Related Quality ◽  
Health Related ◽  
Test Retest Reliability

Objectives The objective of this study was to develop a valid, reliable, web-based generic feline health-related quality-of-life (HRQoL) questionnaire instrument to measure the affective impact of chronic disease. Methods A large initial item pool, obtained through interviews with cat owners, was reduced using predetermined criteria, survey scores for relevance and clarity, and the ability of individual items to discriminate between healthy and sick cats when owners completed a prototype questionnaire. Using these data, factor analysis was used to derive a scoring algorithm and provide evidence for factorial validity. Validity was demonstrated further in a field trial using a ‘known groups’ approach (sick vs healthy cats will have a different HRQoL profile, and the HRQoL profile of cats will deteriorate as comorbidities increase). Test–retest reliability was assessed using intra-class correlation coefficients (ICCs). Results In total, 165 items were reduced to 20 and, on the basis of a factor analysis that explained 72.3% of the variation in scores input by 71 owners of 30 healthy and 41 sick cats using the prototype, these were allocated to three domains (vitality, comfort and emotional wellbeing [EWB]) with a scoring algorithm derived using item loadings. Subsequently, the owners of 36 healthy and 58 sick cats completed one or two (n = 48) assessments. Median scores (healthy vs sick) for all domains were significantly different ( P <0.001), 78% of cats were correctly classified as healthy or sick and for comorbidities the correlation coefficients were moderate (vitality 0.64; comfort 0.63; EWB 0.50). Test–retest reliability was good (ICC vitality 0.635; comfort 0.716; EWB 0.853). Conclusions and relevance This study provides initial evidence for the validity and reliability of a novel HRQoL instrument to aid the assessment and management of chronic diseases of cats.

Psychometric Properties of the Ambulatory Surgery Index of Nausea, Vomiting, and Retching

2016 ◽  
Vol 24 (3) ◽  
pp. 454-464
Author(s):  
Jan Odom-Forren ◽  
Lynne A. Hall ◽  
Susan J. Fetzer
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Longitudinal Data ◽  
Psychometric Properties ◽  
Ambulatory Surgery ◽  
Recovery Period ◽  
Secondary Analysis ◽  
Valid Measure ◽  
Future Studies

Background and Purpose: At least one-third of ambulatory surgery patients will experience nausea or vomiting during the recovery period. The purpose of this study was to examine the psychometric properties of the Ambulatory Surgery Index of Nausea, Vomiting, and Retching (AS-INVR). Methods: Secondary analysis of longitudinal data from a study of 203 adult ambulatory surgery patients was conducted. Results: Based on the results of factor analysis, the retching item was eliminated and the 6-item, 2-dimensional AS-INV was formed. Cronbach’s alphas for the AS-INV ranged from .83 to .87 across the 5 days postsurgery. Higher AS-INV scores were associated with self-reported presence of nausea and lower quality of life. Conclusions: The shortened AS-INV provides a reliable and valid measure of the amount and distress because of nausea and vomiting in adult patients after ambulatory surgery and should be considered for use in future studies.

scholarly journals Modification and Psychometric Evaluation of the Peterson War Scale

2007 ◽  
Vol 101 (2) ◽  
pp. 519-524 ◽  
Author(s):  
D. Gabrielle Jones-Wiley ◽  
Alberto F. Restori ◽  
Howard B. Lee
Keyword(s):  
Factor Analysis ◽  
Psychometric Properties ◽  
Factor Structure ◽  
Internal Consistency ◽  
Longitudinal Research ◽  
Item Analysis ◽  
Psychometric Evaluation ◽  
Internal Consistency Reliability ◽  
Point Scale ◽  
Attitudes Toward War

A measure on attitudes toward war was administered to 125 student participants at a California university to assess psychometric properties for this scale for possible use in current research. A 5-point scale was substituted for the 2-point one originally. Item analysis indicated 23 of 32 items were viable. Using Cronbach reliability coefficient α and factor analysis, the shortened measure had an internal consistency reliability of .85. Factor analysis yielded a 4-factor structure: (1) War is Bad, (2) War is Necessary, (3) Positive Aspects of War, and (4) No Justification. These results indicate this seemingly outdated measure of war attitudes remains useful for current research purposes involving measuring attitudes toward war. However, longitudinal research is necessary.

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