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KMID : 1140920180420020239
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Annals of Rehabilitation Medicine
2018 Volume.42 No. 2 p.239 ~ p.249
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Gender-Related Differences in Reliability ofThorax, Lumbar, and Pelvis Kinematics DuringGait in Patients With Non-specificChronic Low Back Pain
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Bagheri Rasool
Takamjani Ismail Ebrahimi
Dadgoo Mehdi
Ahmadi Amir
Sarrafzadeh Javad
Pourahmadi Mohammad Reza
Jafarpisheh Amir-Salar
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Abstract
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Objective: To evaluate test-retest reliability of trunk kinematics relative to the pelvis during gait in two groups(males and females) of patients with non-specific chronic low back pain (NCLBP) using three-dimensional motioncapture system.
Methods: A convenience sample of 40 NCLBP participants (20 males and 20 females) was evaluated in twosessions. Participants were asked to walk with self-selected speed and kinematics of thorax and lumbar spinewere captured using a 6-infrared-cameras motion-analyzer system. Peak amplitude of displacement and itsmeasurement errors and minimal detectable change (MDC) were then calculated.
Results: Intraclass correlation coefficients (ICCs) were relatively constant but small for certain variables (lowerlumbar peak flexion in female: inter-session ICC=0.51 and intra-session ICC=0.68; peak extension in male: intersessionICC=0.67 and intra-session ICC=0.66). The measurement error remained constant and standard error ofmeasurement (SEM) difference was large between males (generally ≤4.8°) and females (generally ≤5.3°). Standarddeviation (SD) was higher in females. In most segments, females exhibited higher MDCs except for lower lumbarsagittal movements.
Conclusion: Although ICCs were sufficiently reliable and constant in both genders during gait, there was differencein SEM due to difference in SD between genders caused by different gait disturbance in chronic low back pain.Due to the increasing tendency of measurement error in other areas of men and women, attention is needed whenmeasuring lumbar motion using the method described in this study.
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KEYWORD
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Non-specific chronic low back pain, Three-dimensional gait analysis, Reliability, Measurement error
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