Does low back pain affect the reliability of postural regulation?

Area of Science:

• Orthopedics
• Biomedical Engineering
• Rehabilitation Science

Background:

• Low back pain (LBP) significantly impacts quality of life and functional mobility.
• Accurate and reliable assessment tools are crucial for evaluating LBP and guiding treatment.
• Posturography offers a quantitative measure of postural control, but its reliability in LBP populations needs validation.

Purpose of the Study:

• To evaluate the intraobserver reliability of a specific posturographic assessment system.
• To determine the consistency of measurements taken by the same observer over time.
• To assess the suitability of the system for longitudinal studies in an orthopedic context.

Main Methods:

• A posturographic device (Interactive Balance System) was used with a 32 Hz sampling rate.
• Twenty-four patients with low back pain and 24 matched asymptomatic controls participated.
• Two measurements were taken 7 days apart, including tests on solid ground with eyes open and closed.

Main Results:

• Intraclass correlation coefficients (ICC) ranged from 0.36 to 0.94.
• High intraobserver reliability (ICC > 0.75) was achieved for 69% of the analyzed parameters.
• The system demonstrated good to excellent reliability for most measures in both patient and control groups.

Conclusions:

• The posturographic measurement system exhibits sufficient intraobserver reliability for use in longitudinal studies.
• This balance assessment tool can be reliably employed in orthopedic research involving patients with low back pain.
• Findings support the use of this technology for monitoring treatment efficacy and disease progression.