Reliability of goniometric measurements in children with cerebral palsy: a comparative analysis of universal goniometer and electronic inclinometer. A pilot study

Pablo Herrero, Patricia Carrera, Elena García, Eva M Gómez-Trullén, Bárbara Oliván-Blázquez, Pablo Herrero, Patricia Carrera, Elena García, Eva M Gómez-Trullén, Bárbara Oliván-Blázquez

Abstract

Background: Even though technological progress has provided us with more and more sophisticated equipment for making goniometric measurements, the most commonly used clinical tools are still the universal goniometer and, to a lesser extent, the inclinometer. There is, however, no published study so far that uses an inclinometer for measurements in children with cerebral palsy (CP). The objective of this study was two-fold: to independently assess the intra and inter-examiner reliability for measuring the hip abduction range of motion in children with CP using two different instruments, the universal two-axis goniometer and electronic inclinometer. A pool of 5 examiners with different levels of experience as paediatric physiotherapists participated. The study did not compare both instruments because the measurement procedure and the hip position were different for each.

Methods: A prospective, observational study of goniometery was carried out with 14 lower extremities of 7 children with spastic CP. The inclinometer study was carried out with 8 lower extremities of 4 children with spastic CP. This study was divided into two independent parts: a study of the reliability of the hip abduction range of motion measured with a universal goniometer (hip at 0° flexion) and with an electronic inclinometer (hip at 90° flexion). The Intraclass Correlation Coefficient (ICC) was calculated to analyse intra and inter-examiner agreement for each instrument.

Results: For the goniometer, the intra-examiner reliability was excellent (>0.80), while the inter-examiner reliability was low (0.375 and 0.475). For the inclinometer, both the intra-examiner (0.850-0.975) and inter-examiner reliability were excellent (0.965 and 0.979).

Conclusions: The inter-examiner reliability for goniometric measurement of hip abduction in children with CP was low, in keeping with other results found in previous publications. The inclinometer has proved to be a highly reliable tool for measuring the hip abduction range of motion in children with CP, which opens up new possibilities in this field, despite having some measurement limitations.

Figures

Figure 1
Figure 1
Inclinometer measurement. The lower extremity to be measured was held in 90-degree hip flexion, with the contralateral leg stabilised at maximum hip extension by an assistant. The measurement entailed placing the device on the lateral surface of the distal third of the thigh, aligned with the longitudinal axis of the femur.
Figure 2
Figure 2
Goniometer measurement sequence. Goniometer measurement sequence for child 1. The same procedure was used for the inclinometer measurements.

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Source: PubMed

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