Validity and Reliability of the German Quality of Life–Alzheimer’s Disease (QoL-AD) Self-Report Scale

2020 ◽  
Vol 77 (2) ◽  
pp. 581-590 ◽  
Author(s):  
Vanessa Stypa ◽  
Peter Haussermann ◽  
Tim Fleiner ◽  
Sandra Neumann
Keyword(s):  
Quality Of Life ◽  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Construct Validity ◽  
Internal Consistency ◽  
Short Form ◽  
Self Report ◽  
Retest Reliability ◽  
Test Retest Reliability

Background: The Quality of Life–Alzheimer’s Disease (QoL-AD) scale is a widely used measure of quality of life (QoL) in dementia. Although the instrument has been validated in several languages, the psychometric properties of the German self-report version have not yet been analyzed. Objective: This study examines the internal consistency, test-retest reliability, and construct validity of the German QoL-AD self-report scale. Methods: The sample included 30 patients suffering from mild to moderate Alzheimer’s disease or vascular dementia (19 females; mean age 77.3 years; mean Mini-Mental State Examination (MMSE) score 19.7 points). To determine test-retest reliability, the QoL-AD self-report scale was re-administered four to seven days apart. For construct validity analysis, the Dementia Quality of Life instrument (DQoL), Geriatric Depression Scale (GDS), MMSE, and an adapted short form of the Neuropsychiatric Inventory (NPI) were used. Results: The German QoL-AD self-report scale shows an internal consistency of α= 0.79 and a test-retest reliability of r = 0.75 (p < 0.01). Regarding construct validity, there was a significant positive correlation between the total scores of the QoL-AD and DQoL (r = 0.47, p < 0.05). The analysis revealed no significant correlations with the GDS or the adapted NPI. No association could be observed between the QoL-AD and the MMSE (r = 0.01), confirming divergent validity. Conclusion: The results indicate that the German QoL-AD self-report scale is a suitable instrument for assessing QoL in patients suffering from mild to moderate dementia, thus supporting its use in clinical practice and research.

Measuring Patient-Reported Health-Related Quality of Life in Velopharyngeal Insufficiency: Reliability and Validity of the Brazilian Portuguese Version of the VELO Instrument

2019 ◽  
Vol 56 (9) ◽  
pp. 1195-1205 ◽  
Author(s):  
Rafael Denadai ◽  
Cassio Eduardo Raposo-Amaral ◽  
Anelise Sabbag ◽  
Rafael Andrade Ribeiro ◽  
Celso Luiz Buzzo ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Construct Validity ◽  
Internal Consistency ◽  
Reliability And Validity ◽  
Brazilian Portuguese ◽  
Velopharyngeal Insufficiency ◽  
Retest Reliability ◽  
Related Quality ◽  
Test Retest Reliability

Objective: To test the Brazilian Portuguese velopharyngeal insufficiency (VPI) Effects on Life Outcome (VELO) instrument for reliability and validity. Design: Cross-sectional methodological study. Setting: Tertiary craniofacial medical center. Participants: Participants with VPI (VPI group, n = 60), with cleft and without VPI (no VPI/cleft group, n = 60), and with no cleft nor VPI (no VPI/no cleft group, n = 60) and their parents (n = 180). Interventions: All patients with VPI 8+ years old and their parents completed the Brazilian–Portuguese VELO instrument and other questionnaires (Pediatric Quality of Life Inventory4.0, PedsQL4.0; Pediatric Voice-Related Quality of Life, PVRQOL; and Intelligibility in Context Scale, ICS) at baseline; patients with VPI and their parents completed the VELO instrument again 2 weeks later. Main Outcome Measures: The VELO instrument was tested for internal consistency, test–retest reliability, discriminant validity (participants with VPI against participants with no VPI), concurrent validity against other questionnaires, criterion validity against hypernasality severity, and construct validity against nasal air emission and overall velopharyngeal competence (speech construct) and velopharyngeal gap (anatomic construct). Results: The VELO had excellent internal consistency (Cronbach α 0.99 for parents and 0.98 for participants with VPI) and test–retest reliability (all intraclass correlation coefficient > 0.87). The VELO discriminated well between VPI group and unaffected groups (all P < .05). The VELO was significantly correlated with the PedsQL4.0, PVRQOL, and ICS (– r > 0.75; P < .001). The VELO met criterion validity, speech construct validity, and anatomic construct validity ( r > 0.7; P < .001). Conclusions: The Brazilian-Portuguese VELO instrument demonstrated reliability (internal consistency and test–retest) and validity (discriminant, concurrent, criterion, and construct).

scholarly journals Arabic translation and validation of the Sinus and Nasal Quality of Life Survey (SN-5) in pediatric patients with chronic rhinosinusitis

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Ahmed A. Ragab ◽  
Zeinab A. Kasemy ◽  
Ahmad M. Hamdan
Keyword(s):  
Quality Of Life ◽  
Construct Validity ◽  
Chronic Rhinosinusitis ◽  
Internal Consistency ◽  
External Validity ◽  
Control Groups ◽  
Retest Reliability ◽  
Test Retest Reliability ◽  
And Control

Abstract Background This study aimed to validate the translation of the Sinus and Nasal Quality of Life Survey (SN-5) into Arabic (SN-5a) in pediatric chronic rhinosinusitis (CRS) patients. A prospective cohort randomized controlled study was conducted on 129 children with CRS and 100 age- and sex-matched healthy children. The questionnaire was translated into the Arabic language with cross-cultural adaptation. Caregivers answered the questionnaire during their first visits and after 1 week; to assess test–retest reliability and after 2 weeks of medical treatment to test the questionnaire’s ability to detect changes in patients’ symptoms. The responses of the patients and control groups were compared to assess the external validity. Results The SN-5a showed internal consistency and reliability, with Cronbach’s alpha value being 0.69. Item–item and item–total correlation analysis showed adequate construct validity with a highly significant negative correlation between the SN-5 questionnaire items and visual analog scale (VAS) (p < 0.001). There were highly significant positive correlations between items of the questionnaire in the 1st and 2nd visits at 1 week (p < 0.001). A highly significant difference between the case and control groups had been shown for all SN-5a items (p < 0.001). Two weeks after treatment, there were large changes in all the questionnaire items between the first and last visits (effect size > 0.8 for all). Conclusion The translated SN-5a exhibited adequate construct validity, internal consistency, test–retest reliability, and external validity with quite enough ability to assess the longitudinal changes of the disease.

Test-Retest Reliability of the Holyoake Codependency Index with Australian Students

2004 ◽  
Vol 94 (2) ◽  
pp. 482-484 ◽  
Author(s):  
Greg E. Dear
Keyword(s):  
Construct Validity ◽  
Internal Consistency ◽  
Internal Validity ◽  
Self Report ◽  
Full Scale Test ◽  
Retest Reliability ◽  
External Focus ◽  
Scale Test ◽  
Test Retest Reliability ◽  
Report Measure

The Holyoake Codependency Index is a 13-item self-report measure of three aspects of codependency: External Focus, Self-sacrifice, and a sense of being overwhelmed by another person's problematic behavior (termed Reactivity). Previous studies have supported internal validity and the internal consistency and construct validity of the subscales. The present scores for 59 students indicate full scale test-retest reliability of .88 and for subscales (.76 to .82) over a 3-wk. interval.

Quality of life of the mentally ill. Reliability of the Swedish version of the Lancashire Quality of Life profile

1998 ◽  
Vol 13 (5) ◽  
pp. 231-234 ◽  
Author(s):  
L Hansson ◽  
B Svensson ◽  
T Björkman
Keyword(s):  
Quality Of Life ◽  
Internal Consistency ◽  
Social Relations ◽  
Mentally Ill ◽  
Well Being ◽  
Swedish Version ◽  
Cross Sectional ◽  
Retest Reliability ◽  
Test Retest Reliability

SummaryThere has been a growing interest in the quality of life (QoL) of the mentally ill, subsequently a number of instruments to measure QoL have been developed. One of the measures of QoL which has received considerable attention is the Lancashire QoL Profile (LQOLP). The present study investigated test-retest reliability and internal consistency in the Swedish translation of the LQOLP using a cross-sectional sample of 29 inpatients. The results showed that test-retest reliability of subjective life satisfaction in the nine life domains covered by the LQOLP was satisfactory in seven of the domains, and acceptable in two (social relations and religion). Test-retest reliability for total subjective satisfaction score, global well-being, and an interviewer rated QoL were all on a satisfactory level (r > 0.80). The internal consistency and homogeneity of the total subjective QoL scale and the nine life domain subscales was satisfactory except for the social relations scale, where it was somewhat low.

Validation of Persian Individualized Neuromuscular Quality of Life in patients with muscular dystrophies

2020 ◽  
Author(s):  
Kamyar Moradi ◽  
Shirin Jamal-Omidi ◽  
Maryam Masoudi1 ◽  
Sayna Bagheri ◽  
Shahriar Nafissi ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Internal Consistency ◽  
Short Form ◽  
Neuromuscular Disorders ◽  
Validity And Reliability ◽  
Persian Version ◽  
Group Validity ◽  
Sf 36 ◽  
Test Retest Reliability

Background: Neuromuscular disorders affect physical and mental aspects of a patient and in other words alter the patients’ quality of life (QOL). In the present study, we investigated the validity and reliability of the Persian version of Individualized Neuromuscular QOL (INQOL) to provide a better insight into patients’ QOL. Methods: Original version of the INQOL was translated backward and then forward. The resultant Persian version and a standard questionnaire, 36-Item Short Form Health Survey (SF-36), were then given to 83 participants with neuromuscular disorders. Internal consistency, known-group validity, concurrent validity, and test-retest reliability were assessed. Results: The scores of matched sections for QOL in the two questionnaires were favorably correlated (P < 0.05). Correlation between test and retest scores was also significant (P < 0.05). Moreover, the Cronbach’s alpha of 0.82 was representative of robust internal consistency between INQOL covering sections. Conclusion: The Persian version of the INQOL can be used in clinical and research practice to detect changes in QOL which are related to neuromuscular disorders, due to its favorably reliable and valid characteristics.

scholarly journals Reliability and Construct Validity of Self-Report Questionnaires for Patients With Pelvic Girdle Pain

2012 ◽  
Vol 92 (1) ◽  
pp. 111-123 ◽  
Author(s):  
Margreth Grotle ◽  
Andrew M. Garratt ◽  
Hanne Krogstad Jenssen ◽  
Britt Stuge
Keyword(s):  
Construct Validity ◽  
Internal Consistency ◽  
Discriminant Validity ◽  
Pelvic Girdle ◽  
Self Report ◽  
Pelvic Girdle Pain ◽  
Consistency Test ◽  
Retest Reliability ◽  
Sf 36 ◽  
Test Retest Reliability

Background There is little evidence for the measurement properties of instruments commonly used for women with pelvic girdle pain. Objective The aim of this study was to examine the internal consistency, test-retest reliability, and construct validity of instruments used for women with pelvic girdle pain. Design This was a cross-sectional methodology study, including test-retest reliability assessment. Methods Women with pelvic girdle pain in pregnancy and after delivery participated in a postal survey that included the Pelvic Girdle Questionnaire (PGQ), Oswestry Disability Index (ODI), Disability Rating Index (DRI), Fear-Avoidance Beliefs Questionnaire (FABQ), Pain Catastrophizing Scale (PCS), and 8-item version of the Medical Outcomes Study 36-Item Short-Form Health Survey questionnaire (SF-36). Test-retest reliability was assessed with a random subsample 1 week later. Internal consistency was assessed with the Cronbach alpha, and test-retest reliability was assessed with the intraclass correlation coefficient (ICC) and minimal detectable change (MDC). Construct validity based on hypotheses was assessed by correlation analysis. Discriminant validity was assessed with the area under the receiver operating characteristic curve. Results All participants responded to the main (N=87) and test-retest (n=42) surveys. Cronbach alpha values ranged from .88 to .94, and ICCs ranged from .78 to .94. The MDC at the individual level constituted about 7% to 14% of total scores for the 8-item version of the SF-36, ODI, and PGQ activity subscale; about 18% to 22% for the DRI, PGQ symptom subscale, and PCS; and about 25% for the FABQ. Hypotheses were mostly confirmed by correlations between the instruments. The PGQ was the only instrument that significantly discriminated participants who were pregnant from participants who were not pregnant as well as pain locations. Limitations A comparison of responsiveness to change of the various instruments used in this study was not undertaken, but will be carried out in a future study. Conclusions Self-report instruments for assessing health showed good internal consistency, test-retest reliability, and construct validity for women with pelvic girdle pain. The PGQ was the only instrument with satisfactory discriminant validity, thus, it is recommended for evaluating symptoms and disability in patients with pelvic girdle pain.

scholarly journals Development and Validation of a Scale to Measure Religious and Spiritual Support in Sri Lankan Patients with Cancer

2022 ◽  
Author(s):  
Eranthi Weeratunga ◽  
Chandanie Senadheera ◽  
Manjula Hettiarachchi ◽  
Bilesha Perera
Keyword(s):  
Quality Of Life ◽  
Sri Lanka ◽  
Cancer Patients ◽  
Internal Consistency ◽  
Spiritual Support ◽  
Retest Reliability ◽  
Patients With Cancer ◽  
Cronbach's Alpha ◽  
Test Retest Reliability

Abstract Background: Religious and spiritual support (RSS) is considered a vital method of coping among patients with cancer and cancer survivors. Measuring religion and spiritual support received by cancer patients has very little evidence in Sri Lanka compared to the western countries. It would be affected on cancer care management and speedy recovery process of cancer patients; could be benefited to reduce long-term suffering of patients with cancer. This study aimed to develop and validate a tool to measure religion and spiritual support in patients with cancer. Methods: WHO guidelines were incorporated into the cross-cultural adaptation of the newly developed religious and spiritual support scale (RSSS). Internal consistency for the overall RSSS was investigated using Cronbach’s alpha. Intra-class correlation coefficient (ICC) was used to examine the test-retest reliability of the RSSS for the same sample. Validity was checked using convergent and divergent validity. Principal component analysis (PCA) was performed to test factorial/construct validity.Results: The Sinhalese version of RSSS showed a high internal consistency (Cronbach’s alpha-0.883). The scale revealed favourable test-retest reliability (ICC = 0.981). The overall RSSS score correlated negatively and positively with depressive symptoms (r= - 0.338, p<0.05) and quality of life scores; overall (r=0.421, p<0.001), physical (r=0.340, p<0.05), psychological (r=0.279, p=0.08), social (r=0.373, p<0.05) and environmental quality of life (r=0.429, p<0.001) confirming satisfactory divergent and convergent validity of the Sinhalese version of the RSSS. Factor analysis with PCA extracted two factors explaining 74.47% of the variance.Conclusions: The Sinhalese version of RSSS is a reliable and valid scale to assess the religious and spiritual support of patients with cancer in Sri Lanka.

scholarly journals Evaluation of Lower Urinary Tract Dysfunction Impact on Quality of Life in Multiple Sclerosis Patients: Russian Translation and Validation of SF-Qualiveen

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Ekaterina S. Philippova ◽  
Igor V. Bazhenov ◽  
Alexander V. Ziryanov ◽  
Ekaterina Y. Moskvina
Keyword(s):  
Quality Of Life ◽  
Multiple Sclerosis ◽  
Neurogenic Bladder ◽  
Internal Consistency ◽  
External Validity ◽  
Retest Reliability ◽  
Cronbach's Alpha ◽  
Russian Version ◽  
Test Retest Reliability

The Short Form Qualiveen (SF-Qualiveen) is an 8-item version of the Qualiveen questionnaire used to evaluate the impact of urinary symptoms on the quality of life in patients with urological dysfunction due to neurological disorders. The questionnaire was never available in the Russian language before. The study is aimed at providing the translation, cultural adaptation, and validation of a Russian version of the SF-Qualiveen for the use in patients with multiple sclerosis (MS). Materials and Methods. The original English language version of the SF-Qualiveen was translated into Russian according to the cultural and linguistic adaptation algorithm. The participants (50 MS patients with neurogenic bladder and 10 relatively healthy volunteers) filled out the finalized Russian version of the SF-Qualiveen and the Neurogenic Bladder Symptom Score (NBSS) twice, 2 weeks apart. The data obtained was used to determine the internal consistency (Cronbach’s alpha), external validity (the Spearman correlation), and test-retest reliability (intraclass correlation coefficient (ICC)) of the questionnaire. Results. The mean SF-Qualiveen total score was 2.51±0.79 in patients with a neurogenic bladder and 0.1±0.02 in the control group (p<0.001). Cronbach’s alpha exceeded 0.9 indicating an excellent internal consistency of the questionnaire. The retest did not reveal any significant differences between the findings. The test-retest reliability was good for all items and domains (ICC 0.81-0.89). The total score demonstrated the highest ICC (0.89). The external validity was verified by a strong correlation demonstrated between the SF-Qualiveen and NBSS scores. Conclusions. The Russian SF-Qualiveen questionnaire is a reliable, valid, and consistent tool for the assessment of a urinary disorder impact on the quality of life in patients with MS.

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