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Inicio Rehabilitación Reliability and validity of angular measures through the software for postural a...
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Vol. 47. Issue 4.
Pages 223-228 (October - December 2013)
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Vol. 47. Issue 4.
Pages 223-228 (October - December 2013)
Original
Reliability and validity of angular measures through the software for postural assessment. Postural Assessment Software
Fiabilidad y validez de las medidas angulares con un programa para la evaluación postural. Programa informático de evaluación postural
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1370
R.M. Ruivo
, P. Pezarat-Correia, A.I. Carita, J.R. Vaz
Faculdade de Motricidade Humana, Universidade de Lisboa, Portugal
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Tables (2)
Table 1. Mean values, SD and paired t-test results for the intra-examiner analysis (raters A, B and C).
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Table 2. Mean values, SD and ANOVA results of the twenty-four angular measurements of the three examiners (A, B and C).
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Abstract
Introduction

Static posture analysis with the aid of specific software with images is beneficial for large-scale studies and facilitates the diagnosis, planning and follow-up of any physiotherapy treatment. Therefore, this study aimed to determine test–retest and inter-rater reliability and validity of computerized photogrammetry using the Postural Assessment Software (PAS) in relation to goniometry.

Materials and methods

Universal Goniometers were placed in a wall of the Lab, making it possible to obtain four angular measures. A digital camera was positioned on a tripod at a height of 147cm and at a distance of three meters from the wall. A photo was taken with the four goniometers. Two more photos were taken, and the goniometer angles were changed within each photo, obtaining 12 different angular values. Each photograph was analyzed by the three raters using the Postural Assessment Software. Bland–Altman method was used to document the agreement between raters and between Goniometry and Postural Assessment Software.

Results

There were no statistical differences between the two evaluation methods: goniometry and PAS software. The Bland–Altman graph supported the strong consistency between methods, with an average difference equal to 0.06. The use of PAS software was also shown to be intra-rater reliable, with the three raters (A, p=0.17; B, p=0.31; C, p=0.17) with no statistical significant differences between the first and the second measurement, and to have good inter-rater reliability with no statistical differences between raters.

Conclusions

Postural Assessment Software is an accurate and reliable method when compared to the goniometry.

Keywords:
Goniometry
Photogrammetry
Posture
Reliability
Validity
Resumen
Introducción

El análisis estático fotográfico de la postura con la ayuda de software específico es práctico para estudios a gran escala y facilita el diagnóstico, la planificación y acompañamiento de cualquier tratamiento fisioterapéutico. El objetivo fue determinar tanto test-retest e inter-calificadores fiabilidad y validez de la fotogrametría computerizado con el software de evaluación postural (SAP) en relación con goniometría

Materiales y métodos

Los goniómetros universales se pusieron en una pared del laboratorio, permitiendo la obtención de 4 medidas angulares. Una cámara digital se coloca en un trípode a una altura de 1,47 metros y a una distancia de 3 metros de la pared. Una fotografía fue tomada con los cuatro goniómetros y dos fotos más fueron tomadas cambiando los valores angulares de los goniometros entre cada foto, totalizando doce valores angulares diferentes. Cada fotografía fue analizada por los tres evaluadores utilizando el Software de Evaluación postural. Método de Bland–Altman se utilizó para documentar un acuerdo entre los evaluadores y entre Goniometría y Software de Evaluación postural.

Resultados

No hubo diferencias estadísticamente significativas entre los dos métodos de evaluación: goniometría y el software de SAP. La gráfica de Bland-Altman ratificó la fuerte consistencia entre los métodos, con una diferencia media igual a 0,06. El uso de PAS software también mostró ser fiable intra-calificadores (los tres evaluadores no presentaron diferencias significativas entre la primera y la segunda medición) y tener una buena fiabilidad entre evaluadores, sin presentar diferencias estadísticamente significativas entre ellos.

Conclusiones

Software de evaluación postural es un método preciso y fiable en comparación con la goniometría.

Palabras clave:
Fiabilidad
Fotogrametría
Goniometría
Postura
Validez

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