Purpose: With recent technological advances, goniometric applications have increasingly been used for the measurement of joint angles due to the greater practicality and accessibility. It is therefore important to determine the reliability of these applications. The evaluation of the wrist is important, as this joint is commonly affected by trauma that can lead to limitations of movement. Thus, the aim of the study was to determine the intra-examiner and inter-examiner reliability of the Goniometer PRO© smartphone application for measuring the range of motion of the wrist. Basic procedures: A correlational, blind, cross-sectional study was conducted involving 43 healthy women (mean age: 20 ± 2.3 years) with no upper limb injuries. Both wrists were examined in each participant (n=86). Active wrist flexion and extension were measured by three previously trained examiners using the smartphone application for the determination of inter-examiner reliability and a second evaluation was performed after 48 hours for the determination of intra-examiner reliability. Main findings: Excellent intra-examiner (ICC>0.75) and inter-examiner (ICC>0.90) reliability were found for both wrists. A very good correlation (r>0.90; p<0.0001) was found for the intra-examiner evaluation of the left wrist and good correlations (r>0.80; p<0.0001) were found for the right wrist and for the inter-examiner evaluations of both wrists. Good agreement was found for all measures, as demonstrated by the Bland-Altman analysis. Conclusions: The present data on intra-examiner and inter-examiner reliability of the Goniometer PRO© for the smartphone demonstrate that this goniometric application can be used as an effective tool for the evaluation of the range of motion of the wrist.
Introdução: Os aplicativos goniométricos dos smartphones, são ferramentas acessíveis e portáteis que por meio de sensores internos, são capazes de realizar a medida do movimento articular. Contudo, todo instrumento utilizado na prática clínica deve ser válido e confiável, mantendo uma consistência em seus valores quando submetido às mesmas variáveis, circunstâncias e sujeitos. Objetivo: Analisar a mensuração angular de diferentes aplicativos goniométricos para smartphone, com diferentes tempos de uso e diferentes sistemas operacionais. Material e métodos: O presente estudo analisou a confiabilidade dos aplicativos de smartphones para goniometria, através da medida das angulações de um polígono projetado para o estudo, utilizando 100 smartphones, correlacionando diferentes aspectos e condições dos aparelhos. Resultados: De uma maneira geral não houve diferenças para quase todas as variáveis analisadas quando comparadas entre si, apenas houve diferença quando confrontados os dados coletados com os valores de referência. Conclusão: As variáveis analisadas nesse estudo não influenciaram nas leituras angulares, apresentando variações mínimas dos ângulos para todas as condições.
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