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Joint mobility measurements: reliability of a standardized method

P U Dijkstra1, L G de Bont, L T van der Weele

  • 1Department of Oral and Maxillofacial Surgery, University Hospital, Groningen, The Netherlands.

Cranio : the Journal of Craniomandibular Practice
|January 1, 1994
PubMed
Summary

This study introduces a reliable method for measuring joint mobility, moving beyond subjective visual assessments. The standardized protocol using simple tools ensures accurate joint range of motion measurements in healthy individuals.

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Area of Science:

  • Orthopedics
  • Physical Therapy
  • Biomechanics

Background:

  • Visual assessment of joint mobility (hypermobility and hypomobility) is common but has inherent limitations.
  • Objective and reliable measurement methods are needed to overcome the subjectivity of visual joint assessment.
  • Standardized protocols are crucial for consistent and reproducible joint mobility evaluations.

Purpose of the Study:

  • To propose and evaluate a standardized method for measuring joint mobility.
  • To assess the reliability (inter-observer and intra-observer variability) of the proposed measurement technique.
  • To determine if simple tools can provide accurate joint range of motion data.

Main Methods:

  • Measured maximal range of motion for passive digit five hyperextension, passive thumb apposition to the wrist, active elbow and knee hyperextension, active ankle dorsal flexion, and trunk flexion.

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  • Measurements were performed bilaterally (except trunk flexion) on 30 healthy subjects by three experienced observers using goniometers and rules.
  • Two consecutive measurement sessions were conducted, and data were analyzed using analysis of variance.

    • Main Results:

    • Inter-observer variability ranged from 1.35 to 4.58 degrees/mm across different joint movements and measurement sessions.
    • Intra-observer variability ranged from 0.71 to 4.01 degrees/mm for the three observers.
    • The results indicate low variability, suggesting good reliability for the tested joint mobility measurements.

    Conclusions:

    • The presented simple tools and standardized protocol allow for reliable and accurate measurement of joint mobility.
    • This method offers an objective alternative to visual assessment for evaluating joint range of motion.
    • The findings support the clinical utility of this standardized approach in assessing joint mobility.