Catquest-9SF questionnaire shows greater visual functioning in bilateral cataract populations: A prospective study

Purpose: Visual functioning evaluated by the Catquest?9SF questionnaire has shown to be a valid measure for assessing a patient抯 prioritization for cataract surgery. This study adapted Catquest?9SF for visual function outcomes post uni?lateral cataract surgery or bi?lateral cataract surgery. Methods: Visual functioning was assessed before and after uni?lateral or bi?lateral cataract surgery using the Catquest?9SF questionnaire. Patients were enrolled to this study prior to their cataract surgery between March 29 and April 30, 2021 at Shellharbour Hospital, Australia. Catquest?9SF questionnaires were completed prior to and 3 months post surgery. Resulting data were assessed for fit to a Rasch model using WINSTEPS software (version 4.2.0). Catquest?9SF data analysis of Chi?square, Wilcoxon sum test, and Fischer抯 test were performed in R (version 4.1.0). P value <.05 was considered statistically significant. Results: Sixty?one patients (mean age = 73.2 years, 62% female) were included for analysis. Catquest?9SF response thresholds, adequate precision (person separation index = 2.58, person reliability = 0.87, Cronbach抯 alpha = 0.74), uni?dimensionality, and no misfits (infit range 0.65�33; outfit range 0.64�31) were recorded. The mean of item calibration for patients was ?0.22 post?operatively. There was significant (P <.05) improvement (16.3%) in visual functions across all nine Catquest 9?SF items. There was a significant mean visual function difference between patients with uni?lateral (10.1%) and bi?lateral cataract surgery (22.3%) pre?operatively and post?operatively. Conclusion: The Catquest?9SF questionnaire showed excellent psychometric properties and can assess visual functioning in an Australian population. There was a significant improvement in patient visual function post cataract surgery and higher functioning with bi?lateral cataract surgery

Development of Flood Disaster Preparedness Activity (FDPA) Items: A Preliminary Study Using Rasch Analysis

Abstract@#Introduction: Not only does flood affects the household community, but it also has an impact on business entities, particularly small and medium enterprises (SMEs) located in flood-prone areas. In order to assist SMEs to prepare for a flood disaster effectively, the set-up of a disaster preparedness plan is essential. The purpose of this study is to develop a validated instrument for identifying the different levels of disaster preparedness among SMEs in their readiness to face a flood disaster. Methods: In this preliminary study, 26 items of flood disaster preparedness activities (FDPA) reviewed from works of literature were adopted and adapted to be randomly administered to 30 respondents (SME business owners) located in the Temerloh province, Malaysia, which is identified as a flood-prone area. A Rasch analysis technique was used to identify the psychometric properties of the instrument. Results: Using the Rasch measurement analysis technique, the instrument used was able to categorise the SMEs into two level of preparedness: low and moderate. About 25 items were found to possess good psychometric features in determining the flood preparedness level of SMEs despite the lack of items on measuring high-level preparedness activities. Conclusion: The results of this preliminary study have served to highlight the strength of the instrument and gaps identified for further improvement in the near future.

Rasch Analysis of the Clinimetric Properties of the Korean Dizziness Handicap Inventory in Patients with Parkinson Disease / 대한평형의학회지

OBJECTIVES: The Korean Dizziness Handicap Inventory (KDHI), which includes 25 patient-reported items, has been used to assess self-reported dizziness in Korean patients with Parkinson disease (PD). Nevertheless, few studies have examined the KDHI based on item-response theory within this population. The aim of our study was to address the feasibility and clinimetric properties of the KDHI instrument using polytomous Rasch measurement analysis. METHODS: The unidimensionality, scale targeting, separation reliability, item difficulty (severity), and response category utility of the KDHI were statistically assessed based on the Andrich rating scale model. The utilities of the orderedresponse categories of the 3-point Likert scale were analyzed with reference to the probability curves of the response categories. The separation reliability of the KDHI was assessed based on person separation reliability (PSR), which is used to measure the capacity to discriminate among groups of patients with different levels of balance deficits. RESULTS: Principal component analyses of residuals revealed that the KDHI had unidimensionality. The KHDI had satisfactory PSR and there were no disordered thresholds in the 3-point rating scale. However, the KDHI showed several issues for inappropriate scale targeting and misfit items (items 1 and 2) for Rasch model. CONCLUSIONS: The KDHI provide unidimensional measures of imbalance symptoms in patients with PD with adequate separation reliability. There was no statistical evidence of disorder in polytomous rating scales. The Rasch analysis results suggest that the KDHI is a reliable scale for measuring the imbalance symptoms in PD patients, and identified parts for possible amendments in order to further improve the linear metric scale.

Brazilian study of adaptation and psychometric properties of the Coping Health Inventory for Parents

Abstract The Coping Health Inventory for Parents (CHIP) evaluates coping patterns of parents of chronically ill children and assesses different coping strategies using three subscales. This study aimed to translate and transculturally adapt the CHIP for a Brazilian sample and investigate the preliminary psychometrics of the scale. Rating scale Rasch analysis was performed on CHIP responses, and the psychometric performance of each of the three subscales was tested. Two hundred twenty parents of individuals with health problems participated in the study, answering a sociodemographic questionnaire­the Brazilian version of the CHIP­and Folkman and Lazarus's coping questionnaire. All items exhibited good fit to the measurement model, although response categories were not used as intended and little variability on person parameter estimates was obtained. These preliminary results suggested that each construct being measured by the three subscales should be treated separately, corroborating the theoretical model of the original instrument. Suggestions to address the psychometric limitations of the instrument were made in order to improve measurement precision. (AU)

Validación por modelo de Rasch del Cuestionario de Calidad de Vida (PedsQL 4. 0®) en niños y adolescentes colombianos / Rasch Model in the Validation of the Paediatric Quality of Life Inventory TM 4. 0 (PedsQL 4.0TM) in Colombian Children and Adolescents

Introducción: La escala PedsQL 4.0® se ha probado confiable y sensible a los cambios en el estado de salud, y es de rápida y fácil aplicación. El propósito de este estudio es validar la PedsQL 4.0®a partir de la aplicación del modelo de Rasch en niños y adolescentes colombianos de ambos sexos. Métodos: Se llevó a cabo un estudio observacional de validación de instrumentos de medición. Se realizó un muestreo no probabilístico por conveniencia, conformado por 375 sujetos de 5 a 18 años de edad y 500 cuidadores de menores de 2 a 18 años en cinco ciudades colombianas. Las propiedades psicométricas de la escala se analizaron según el modelo de Rasch, entre ellas el ajuste, la separación y el funcionamiento diferencial del ítem. Resultados: Se encontró un adecuado ajuste de los datos al modelo de Rasch. La dimensión social presentó mayor dificultad que la dimensión de salud física en las dos versiones. Se observó consistencia interna de los ítems, mientras que para las personas, los valores de confiabilidad y separación estuvieron por debajo de lo establecido. El funcionamiento diferencial del ítem ocurrió en unas pocas variables, en especial, al comparar por ciudad. Las curvas características de los ítems presentaron umbrales desordenados. Conclusiones: Los ítems presentaron una consistencia adecuada; el análisis por personas no mostró una separación adecuada; sin embargo, se encontraron umbrales desordenados en las categorías de respuesta. No se presentó funcionamiento diferencial del ítem por sexo o por enfermedad, pero llama la atención que el sí ocurriera entre ciudades.

Introduction: The aim of this study was to validate the PedsQL 4.0TM in Colombian children and adolescents using the Rasch model. The Paediatric Quality of Life Inventory (PedsQL 4.0TM) has demonstrated to be a reliable and sensitive measurement to changes in health status, as well as being quick and easy to use. Methods: Validation study of measurement tools. The PedsQL 4.0TMwas applied to a convenience sample of 375 children and adolescents between 5 and 17 years old and 500 caregivers of children between 2 and 18 years old in five Colombian cities. The psychometric properties were analysed according to the Rasch model, including adjustment, separation, and differential item functioning (DIF). Results: The Rasch model provided adequate fits to data. The social dimension, for both versions, had greater difficulty than the physical health dimension. Internal consistency for the items was observed, while for individuals, the values of reliability and separation were lower than that established. The DIF occurred in very few variables, especially when comparing cities. The characteristic curves for the items presented disordered thresholds. Conclusions: The items had adequate internal consistency. Analysis showed adequate individual separation, but disordered thresholds were found in the response categories. No DIF was observed by sex or disease, but it is noteworthy that the DIF occurred between cities

Análise das propriedades psicométricas do American Orthopaedic Foot and Ankle Society Score (Aofas) em pacientes com artrite reumatoide: aplicação do modelo Rasch / Analysis of the psychometric properties of the American Orthopaedic Foot and Ankle Society Score (AOFAS) in rheumatoid arthritis patients: application of the Rasch model

Resumo Objetivo: Testar a confiabilidade e a validade do escore Aofas em uma amostra de pacientes com artrite reumatoide. Métodos: A escala foi aplicada a pacientes com artrite reumatoide, duas vezes pelo entrevistador 1 e uma vez pelo entrevistador 2. O Aofas foi submetido a exame de confiabilidade teste-reteste (com 20 indivíduos com artrite reumatoide). As propriedades psicométricas foram investigadas pela análise Rasch em 33 pacientes com artrite reumatoide. Resultados: O coeficiente de correlação intraclasse (CCI) foi de 0,90 < CCI < 0,95 (p < 0,001) para a confiabilidade intraexaminador e 0,75 < CCI < 0,91 (p < 0,001) para a confiabilidade interexaminador. O índice de separação dos indivíduos foi de 1,9 e 4,75 para os itens. Isso demonstra que os pacientes se dividiam em três níveis de habilidade e os itens foram divididos em seis níveis de dificuldades. A análise Rasch mostrou que oito itens foram satisfatórios. Foi identificado um item errôneo, que mostrou percentuais acima dos 5% permitidos pelo modelo estatístico. Além disso, o modelo Rasch sugeriu a revisão do item 8 original. Conclusões: Os resultados sugerem que a versão brasileira do Aofas apresenta confiabilidade adequada, validade de constructo e estabilidade de resposta. Esses resultados indicam que a escala de tornozelo-retropé Aofas apresenta um potencial significativo de aplicabilidade clínica em indivíduos com artrite reumatoide. Outros estudos em populações com outras características já estão em andamento.

Abstract Objective: To tested the reliability and validity of Aofas in a sample of rheumatoid arthritis patients. Methods: The scale was applicable to rheumatoid arthritis patients, twice by the interviewer 1 and once by the interviewer 2. The Aofas was subjected to test-retest reliability analysis (with 20 Rheumatoid arthritis subjects). The psychometric properties were investigated using Rasch analysis on 33 Rheumatoid arthritis patients. Results: Intra-Class Correlation Coefficient (ICC) were (0.90 < ICC < 0.95; p < 0.001) for intra-observer reliability and (0.75 < ICC < 0.91; p < 0.001) for inter-observer reliability. Subjects separation rates were 1.9 and 4.75 for the items, showing that patients fell into three ability levels, and the items were divided into six difficulties levels. The Rasch analysis showed that eight items was satisfactory. One erroneous item have been identified, showing percentages above the 5% allowed by the statistical model. Further Rasch modeling suggested revising the original item 8. Conclusions: The results suggest that the Brazilian versions of Aofas exhibit adequate reliability, construct validity, response stability. These findings indicate that Aofas Ankle-Hindfoot scale presents a significant potential for clinical applicability in individuals with rheumatoid arthritis. Other studies in populations with other characteristics are now underway.

Reliability and validity of the Chinese version of the Functional Ability of the Visually Impaired ;Questionnaire by using Rasch analysis / 中国实用护理杂志

Objective To explore the psychometric properties of the Chinese version of the Functional Ability of Visually Impaired Questionnaire (CfaVIQ) by using Rasch Analysis. Methods The faVIQ was translated and adapted into the Chinese-version faVIQ (CfaVIQ). The CfaVIQ was completed by 215 visionlly impaired patients. The data were Rasch-analyzed with the Rating Scale Model of Andrich for calculating item fit statistics, determining the separation index by using Winsteps Rasch measurement program. Results Rasch model analysis indicated individual separation index (3.55) and project separation index (8.01) were both arithmetic greater than 2; the inlier-sensitive fit Mean Square (infitMnSq) and outlier-sensitive fit Mean Square (outfitMnSq) of Items, Persons were both within the range of 0.5-1.5, indicating great coincidence to the model;Wright map analysis showed the distribution of the sample ability and item difficulty was ideally normal. Coefficient of internal consistency was 3.55, separation reliability was 0.93. Pearson correlation coefficient of test-retest reliability was 0.92. Pearson correlation coefficient between CfaVIQ and vision (-0.67), visual acuity (-0.14). The National Eye Institute 25 Item Visual Function Questionnarie (NEI-VFQ25) (0.79) indicated a good construct validity. All the items′outfitMnSq, except outfitMnSq>1.5 of item 10 and item 23,were within the range of 0.5-1.5. Criterion Validity was 0.922 (95%CI:0.858-0.987). Conclusions The CfaVIQ is a culturally specific vision quality of life measure instrument. It can sensitively assess the quality-of-life in the visually impaired group. Rasch measurement model can provide comprehensive and positive information and has good application prospects for analysis of CfaVIQ.

Análisis de la confiabilidad de los resultados de la Prueba de Diagnóstico Matemática en la Universidad Nacional de Costa Rica utilizando el modelo de Rasch

El objetivo del presente estudio es evidenciar cómo la implementación de la teoría de respuesta a los ítems, en particular el modelo de Rasch, ha logrado mejorar los índices de confiabilidad de la prueba de diagnóstico matemático en la Universidad Nacional de Costa Rica, pasando de un alfa de .51 en el 2010 a uno de .78 en el 2012. El análisis psicométrico permitió brindar recomendación acerca de la construcción de la prueba que redundaron en mejores indicadores y elaboración de ítems para medir los diferentes niveles de habilidad que es el propósito fundamental de una prueba diagnóstica.

Summary. The goal of this study is to show how the implementation of the theory of item response, particularly the Rasch model has improved the reliability indices math test diagnosis at the National University of Costa Rica, from an alpha of 0.51 in 2010 to one of 0, 78 in 2012. The psychometric analysis allowed providing recommendation regarding the construction of the test which resulted in better indicators and preparation of items to measure the different levels of skill that is the fundamental purpose of a diagnostic test.

Psychometric properties of the Brazilian version of the Pain Catastrophizing Scale for acute low back pain / Propriedades psicométricas da versão brasileira da Escala de Catastrofização da Dor para dor lombar aguda

Measurement instruments of pain catastrophizing for middle-aged and elderly individuals are needed to understand its impact on low back pain. The goals were to cross-culturally adapt the Pain Catastrophizing Scale, assess the construct validity through Rasch analysis, and verify reliability and convergent validity of pain catastrophizing with psychosocial factors. 131 individuals aged 55 years and older with acute low back pain were interviewed . The intra-rater reliability was Kp = 0.80 and interrater Kp = 0.75. The Rasch analysis found adequate reliability coefficients (0.95 for items and 0.90 for individuals ). The separation index for the elderly was 2.95 and 4.59 items. Of the 13 items, one did not fit the model, which was justified in the sample evaluated. The pain catastrophizing correlated with most psychosocial factors. The instrument proved to be clinically useful. Subsequent studies should carry out the same analysis in different populations.

Instrumentos de medida da catastrofização da dor para indivíduos de meia-idade e idosos são necessários para compreensão do impacto na dor lombar nessa população. Os objetivos foram adaptar transculturalmente a Escala de Catastrofização da Dor, avaliar a validade de construto pela análise Rasch, verificar a confiabilidade e a validade convergente da catastrofização da dor com fatores psicossociais. Participaram 131 indivíduos comunitários com 55 anos e mais com dor lombar aguda. A confiabilidade intra-examinadores foi de Kp = 0,80 e inter-examinadores Kp = 0,75. A análise Rasch, detectou adequados coeficientes de confiabilidade (0,95 para itens e 0,90 para indivíduos). O índice de separação dos idosos foi de 2,95 e dos itens 4,59. Dos 13 itens, um não se enquadrou no modelo, o que se justificou na amostra avaliada. A catastrofização da dor se correlacionou com a maioria dos fatores psicossociais. O instrumento mostrou-se clinicamente útil. Estudos subsequentes devem proceder às mesmas análises em diferentes populações.

Cross-cultural adaptation and analysis of the psychometric properties of the Balance Evaluation Systems Test and MiniBESTest in the elderly and individuals with Parkinson's disease: application of the Rasch model / Adaptação transcultural e análise das propriedades psicométricas do Balance Evaluation Systems Test e do MiniBESTest em idosos e indivíduos com doença de Parkinson: aplicação do modelo Rasch

BACKGROUND: Older adults and individuals with neurological problems such as Parkinson's disease (PD) exhibit balance deficits that might impair their mobility and independence. The assessment of balance must be useful in identifying the presence of instability and orient interventions. OBJECTIVE: To translate and perform a cross-cultural adaptation of the Balance Evaluation Systems Test (BESTest) and MiniBESTest to Brazilian Portuguese and analyze its psychometric properties. METHOD: The tests were translated and adapted to Portuguese according to a standard method and then subjected to a test-retest reliability assessment (10 older adults; 10 individuals with PD). The psychometric properties were assessed by the Rasch model (35 older adults; 35 individuals with PD). RESULTS: The reliability coefficient of the tests relative to the items and subjects varied from 0.91 and 0.98, which is indicative of the stability and reproducibility of the measures. In the BESTest, the person (4.19) and item (5.36) separation index established six balance ability levels and seven levels of difficulty, respectively. In the MiniBESTest, the person (3.16) and item (6.41) separation index established four balance ability levels and nine levels of difficulty, respectively. Two items in the BESTest did not fit with the model expectations, but the construct validity was not compromised. No item in the MiniBESTest was erratic. CONCLUSIONS: The results corroborate the diagnostic and screening functions of the BESTest and MiniBESTest, respectively, and indicate that the Brazilian versions exhibit adequate reliability, construct validity, response stability, and capacity to distinguish among various balance ability levels in older adults and individuals with PD. .

CONTEXTUALIZAÇÃO: Idosos e indivíduos com problemas neurológicos, como a doença de Parkinson (DP), apresentam déficits de equilíbrio que podem comprometer a mobilidade e independência. A avaliação do equilíbrio deve identificar a instabilidade e direcionar a intervenção. OBJETIVOS: Traduzir e adaptar transculturalmente o Balance Evaluation Systems Test (BESTest) e o MiniBESTest para o português-Brasil e analisar suas propriedades psicométricas. MÉTODO: Os testes foram traduzidos e adaptados para o português seguindo instruções padronizadas e foram submetidos à análise de confiabilidade teste-reteste (dez idosos; dez indivíduos com DP). As propriedades psicométricas foram avaliadas pela análise Rasch (35 idosos; 35 indivíduos com DP). RESULTADOS: Os coeficientes de confiabilidade dos testes para itens e indivíduos variaram de 0,91 a 0,98, indicando estabilidade e possibilidade de reprodução das medidas em aplicações subsequentes. No BESTest, os índices de separação dos indivíduos (4,19) e dos itens (5,36) determinaram, respectivamente, seis níveis de habilidade de equilíbrio e sete níveis de dificuldade. No MiniBESTest, os índices dividiram os indivíduos (3,16) em quatro níveis de habilidade e os itens (6,41) em nove níveis de dificuldade. Dois itens do BESTest não se adequaram às expectativas do modelo, o que não comprometeu sua validade de constructo. No MiniBESTest não houve item errático. CONCLUSÕES: Os resultados dão suporte à função de diagnóstico e triagem para o BESTest e MiniBESTest, respectivamente, e sugerem que as versões brasileiras apresentam adequada confiabilidade, ...

Funcionamento Diferencial do Item no Alcohol Use Disorders Identification Test / Differential Item Functioning in the Alcohol Use Disorders Identification Test / Funcionamiento Diferencial del Ítem en el Alcohol Use Disorders Identification Test

O objetivo do presente estudo foi investigar a presença de Funcionamento Diferencial do Item (DIF) para o sexo nos itens de uma popular medida de rastreio para a dependência do álcool, o Alcohol Use Disorders Identification Test (AUDIT). Os participantes foram 254 estudantes universitários. As análises de DIF foram realizadas a partir do modelo Partial Credit. Três itens não apresentaram ajuste adequado ao modelo, enquanto outro item apresentou um viés de grande magnitude para o sexo feminino. Especificamente, o itemAUDIT-6 mostrou ser, de fato, um aspecto do beber com maior severidade para indivíduos do sexo feminino do que para aqueles dosexo masculino. Recomenda-se cautela na utilização de escores brutos a partir dos 10 itens originais do instrumento e a exclusão doitem AUDIT-6 ou sua reformulação para a aplicação em indivíduos do sexo feminino.

The aim of the present study was to investigate Differential Item Functioning (DIF) for sex in a popular screening measure of alcohol dependence, the Alcohol Use Disorders Identification Test (AUDIT). Participants were 254 undergraduate students. Raschanalysis-based DIF procedures were employed to evaluate the possibility of sex bias in the AUDIT items. Results showed three items with inadequate fit to the unidimensional Partial Credit model and one item with a large bias against women. Specifically, item AUDIT-6 showed a larger difficulty estimate for women, suggesting a more severe aspect of drinking behavior for these individuals. Recommendations are made with regard to using raw scores based on the sum of the 10 AUDIT items. Dropping out or reformulating the AUDIT-6 item to accommodate sex differences and to reduce errors of individual ability (severity) estimates is strongly advised.

El objetivo del presente estudio fue investigar la presencia de Funcionamiento Diferencial del Ítem (DIF) para el sexo en los ítems de una popular medida de rastreo para la dependencia del alcohol, el Alcohol Use Disorders Identification Test (AUDIT). Participaron 254 estudiantes universitarios. Los análisis de DIF fueron realizados a partir del modelo Partial Credit. Tres ítems no presentaron ajusteade cuado al modelo, mientras otro ítem mostró una tendencia de gran magnitud para el sexo femenino. Específicamente, el ítem AUDIT-6 mostró ser, de hecho, un aspecto del beber con mayor severidad para individuos del sexo femenino que para aquellos del sexo masculino. Se recomienda precaución en el uso de escores brutos a partir de los 10 ítems originales del instrumento y la exclusióndel ítem AUDIT-6 o su reformulación para la aplicación en individuos del sexo femenino.

Teste de habilidades sociais para crianças: evidências psicométricas de uma versão inicial / Children's social skills test: psychometric evidences of the initial version

Este artigo descreve o desenvolvimento de uma medida de avaliação das habilidades sociais em crianças do ensino fundamental. Foram investigadas 257 crianças que cursavam de segundo ao quarto ano, de escolas públicas de cidades do interior do estado de São Paulo, com idades entre 8 e 11 anos e média de 9 anos. A escala foi composta de 99 itens descritores de situações de relacionamento interpessoal em situações escolares. A análise de componentes principais com rotação varimax sugeriu uma estrutura de três fatores que explicaram 38,42 por cento de variância. Os fatores foram civilidade e altruísmo (alfa = 0,85), desenvoltura e autocontrole na situação de interação (alfa=0,60) e assertividade de enfrentamento (alfa=0,47). A aplicação do instrumento ocorreu de forma coletiva, realizada nas salas de aulas dos alunos, e somente a aqueles cujos pais haviam autorizado previamente. Esse instrumento avalia os fatores de habilidades sociais separando a dificuldade de expressão de cada uma das condutas, o que pode ser útil no planejamento de intervenções. Além disso, esses resultados denotam confiabilidade no uso do instrumento em futuras pesquisas.

This article describes the development of a social skills measure for elementary school children. 257 children, attending in second to fourth grades in public schools in the interior of São Paulo State, aged from 8 to 11 years old (mean age 9 years, DP=0,77) were studied. The scale was composed by 99 items that described scholar interpersonal relationship situations. The data were analyzed by means of principal components analysis with varimax rotation and suggested a three factor structure explaining 38,42 percent of variance. The dimensions were altruism and civility (alpha=0,85); self-control and resourcefulness in the social interaction (alpha=0,60) and coping assertivity (alpha=0,47). The application of the instrument was made collectively, in the students' classrooms, and only to those students whose parents provided previous authorization. The instrument assesses social skill factors splitting the difficulty of behavior expression of each behavior, which can be useful in the planning of interventions. These data enables the instrument to be used in future research.

Application of Rasch analysis in clinical nursing examination / 中国实用护理杂志

Objective To evaluate the strictness and self-consistency of the charge nurses in the nurses examination using venipunctnre trocar operation as research object.Methods FACETS,the polyhedral Rasch software was used in the examination.Results The strictness and self-consistency of charge nurses were evidently different.Conclusions The variable strictness and self-consistency of the charge nurses in the examination leads to unreliability of the results.Developing a scientific and reliable evaluation system is essential to improve the ability of the teaching nurses and the student nurses as well as the hospital nursing quality.

Propriedades psicométricas da versão brasileira da escala de qualidade de vida específica para acidente vascular encefálico: aplicação do modelo Rasch / Psychometric properties of the Brazilian version of the Stroke Specific Quality of Life Scale: application of the Rasch model

CONTEXTUALIZAÇÃO: O acidente vascular encefálico (AVE) produz déficits importantes na qualidade de vida (QV) dos indivíduos. Medidas específicas de QV são necessárias para compreender e quantificar o impacto dessa patologia. OBJETIVO: O objetivo desse estudo foi adaptar transculturalmente o Stroke Specific Quality of Life Scale (SSQOL) para o Português (Brasil) e avaliar suas propriedades psicométricas. MATERIAIS E MÉTODOS: O SSQOL foi traduzido e adaptado seguindo instruções padronizadas e submetido a exame de confiabilidade teste-reteste (10 hemiplégicos). As propriedades psicométricas foram investigadas pela análise Rasch em 50 hemiplégicos. RESULTADOS: Foram detectados coeficientes de confiabilidade de 0,92 para itens e indivíduos. O índice de separação dos hemiplégicos foi 3,34 e dos itens, 3,36, ou seja, os itens separaram as pessoas em pelo menos três níveis de QV e em três níveis de QV - baixa, média e alta. Dos 49 itens, quatro não se enquadram no modelo, o que compromete a validade de constructo do instrumento, embora o padrão errático dos itens se justifique na amostra examinada. CONCLUSÕES: O instrumento mostrou-se clinicamente útil na população avaliada. Novos estudos em populações com outras características já estão em andamento.

BACKGROUND: Stroke results in important deficits, which reduce individuals' quality of life (QOL). Specific QOL measurements are necessary to understand and quantify the impact of this pathological condition. OBJECTIVE: The aim of this study was to make a transcultural adaptation of the Stroke Specific Quality of Life Scale (SSQOL) into Brazilian Portuguese and to assess its psychometric properties. METHODS: The SSQOL was translated and adapted in accordance with standardized procedures and was subjected to test-retest reliability analysis with 10 hemiplegic subjects. The psychometric properties were investigated using Rasch analysis on 50 hemiplegics. RESULTS: Reliability coefficients of 0.92 were found for items and subjects. The separation index for the hemiplegics was 3.34, while, for the items, it was 3.36. These results indicated that the items separated the subjects into at least three levels of QOL: Low, medium, and high. Of the 49 items, four did not fit into the model, which partially invalidated the construct validity of the instrument, although the erratic patterns of these items could also be explained in the present sample. CONCLUSIONS: The instrument was shown to be clinically useful for the assessed population and other studies in populations with other characteristics are now underway.