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      Tradução e validação da escala Knee Society Score: KSS para a Língua Portuguesa Translated title: Translation and validation of the Knee Society Score: KSS for Brazilian Portuguese

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          Abstract

          OBJETIVO: Traduzir, adaptar culturalmente e validar o "Knee Society Score" (KSS) para a língua portuguesa e verificar suas propriedades de medida, reprodutibilidade e validade. MÉTODO: Avaliados 70 pacientes de ambos os sexos, em estudo clínico transversal, idade entre 55 e 85 anos, osteoartrose primária submetidos a artroplastia total de joelho, com o questionário KSS pelo avaliador 1 (inglês) e após 30 minutos pelo avaliador 2 (português) no pré- operatório e após três e seis meses de pós-operatório. RESULTADOS: O índice alfa de Cronbach e a diagramação de Bland-Altman não detectaram diferença entre as médias das duas avaliações no pré-operatório (p=1,000), com três meses (p=0,991) e seis meses de pós-operatório (p=0,985) na pontuação do joelho e na nota da função do joelho, p=1,000 nos três períodos. CONCLUSÃO: A versão brasileira do Knee Society Score, o Escore da Sociedade do Joelho, mostrou ser um instrumento de fácil compreensão e aplicação; válido e confiável para medir a pontuação e função do joelho de pacientes brasileiros submetidos a ATJ. Nível de Evidências: Estudos diagnósticos - Nivel de Evidência I, Teste de critérios diagnósticos desenvolvidos anteriormente em pacientes consecutivos (com padrão de referência "ouro" aplicado).

          Translated abstract

          OBJECTIVE: To translate, culturally adapt and validate the "Knee Society Score" (KSS) for the Portuguese language and determine its measurement properties, reproducibility and validity. METHOD: We analyzed 70 patients of both sexes, aged ages between 55 and 85 years, in a cross-sectional clinical trial, with diagnosis of primary osteoarthritis, undergoing total knee arthroplasty surgery. We assessed the patients with the English version of the KSS questionnaire and after 30 minutes with the Portuguese version of the KSS questionnaire, done by a different evaluator. All the patients were assessed preoperatively, and again at three, and six months postoperatively. RESULTS: There was no statistical difference, using Cronbach's alpha index and the Bland-Altman graphical analysis, for the knee score during the preoperative period (p = 1), and at three months (p = 0.991) and six months postoperatively (p = 0.985). There was no statistical difference for knee function score for all three periods (p = 1.0). CONCLUSION The Brazilian version of the Knee Society Score is easy to apply, as well providing as a valid and reliable instrument for measuring the knee score and function of Brazilian patients undergoing TKA. Level of Evidence: Level I - Diagnostic Studies- Investigating a Diagnostic Test - Testing of previously developed diagnostic criteria on consecutive patients (with universally applied 'gold' reference standard).

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          Comparing methods of measurement: why plotting difference against standard method is misleading.

          When comparing a new method of measurement with a standard method, one of the things we want to know is whether the difference between the measurements by the two methods is related to the magnitude of the measurement. A plot of the difference against the standard measurement is sometimes suggested, but this will always appear to show a relation between difference and magnitude when there is none. A plot of the difference against the average of the standard and new measurements is unlikely to mislead in this way. We show this theoretically and by a practical example.
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            A self-administered questionnaire for the assessment of severity of symptoms and functional status in carpal tunnel syndrome.

            We developed a self-administered questionnaire for the assessment of severity of symptoms and functional status in patients who have carpal tunnel syndrome. The reproducibility, internal consistency, validity, and responsiveness to clinical change of scales for the measurement of severity of symptoms and functional status were evaluated in a clinical study. The scales were highly reproducible (Pearson correlation coefficient, r = 0.91 and 0.93 for severity of symptoms and functional status, respectively) and internally consistent (Cronbach alpha, 0.89 and 0.91 for severity of symptoms and functional status, respectively). Both scales had positive, but modest or weak, correlations with two-point discrimination and Semmes-Weinstein monofilament testing (Spearman coefficient, r = 0.12 to 0.42). In thirty-eight patients who were operated on in 1990 and were evaluated a median of fourteen months postoperatively, the mean symptom-severity score improved from 3.4 points preoperatively to 1.9 points at the latest follow-up examination, while the mean functional-status score improved from 3 to 2 points (5 points is the worst score and 1 point is the best score for each scale). Similar improvement was noted in twenty-six patients who were evaluated before and three months after the operation. We concluded that the scales for the measurement of severity of symptoms and functional status are reproducible, internally consistent, and responsive to clinical change, and that they measure dimensions of outcomes not captured by traditional measurements of impairment of the median nerve. These scales should enhance standardization of measurement of outcomes in studies of treatment for carpal tunnel syndrome.
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              Análise de dados qualitativos: estratégias metodológicas para ciências da saúde, humanas e sociais

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                aob
                Acta Ortopédica Brasileira
                Acta ortop. bras.
                Sociedade Brasileira de Ortopedia e Traumatologia (São Paulo )
                1809-4406
                2012
                : 20
                : 1
                : 25-30
                Affiliations
                [1 ] Universidade de São Paulo Brazil
                Article
                S1413-78522012000100005
                10.1590/S1413-78522012000100005
                e07a554b-a272-454a-9fa6-e925a5c7804d

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1413-7852&lng=en
                Categories
                ORTHOPEDICS

                Orthopedics
                Knee,Arthroplasty, Replacement, Knee,Scale,Questionnaires,Joelho,Artroplastia do joelho,Escalas,Tradução (processo),Questionário

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