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Reliability in evaluating passive intervertebral motion

C Gonnella, S V Paris, M Kutner

    Physical Therapy
    |April 1, 1982
    PubMed
    Summary
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    Physical therapists showed dependable intra-therapist reliability in vertebral column mobility assessments. However, inter-therapist reliability was inconsistent, highlighting the need for further study on therapist and subject factors influencing measurement variability.

    Area of Science:

    • Rehabilitation Medicine
    • Physical Therapy
    • Clinical Measurement

    Background:

    • Reliable measurements are crucial for effective outcome studies in physical therapy.
    • Variability in physical therapist assessments can impact patient care and therapeutic programming.

    Purpose of the Study:

    • To assess the reliability of physical therapists in evaluating passive vertebral column mobility.
    • To identify sources of measurement variability, including intra-therapist and inter-therapist reliability, grading criteria, and subject characteristics.

    Main Methods:

    • A study involving five physical therapists and five normal subjects.
    • Assessment of intra-therapist reliability (consistency of one therapist over time).
    • Assessment of inter-therapist reliability (consistency between different therapists).

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    Main Results:

    • Intra-therapist reliability for passive vertebral column mobility assessment was found to be dependable.
    • Inter-therapist reliability was not consistent, indicating significant variability between therapists.
    • Identified potential sources of variability include therapist experience, subject characteristics, and the assessment instrument.

    Conclusions:

    • While individual therapists may be reliable, consistency across therapists is a significant issue in vertebral column mobility assessment.
    • Further research is needed to address idiosyncratic therapist behaviors, subject variability, and instrument limitations.
    • Periodic assessment of therapist reliability is recommended to ensure accurate therapeutic programming.