Article

OBJECTIVE: To develop a standardized, reliable, valid spine model of active trunk
movements that accurately discriminates kinematic patterns of patients with
chronic non-specific low back pain from those of healthy subjects. DESIGN:
Comparative cohort study. SUBJECTS: Healthy subjects (n = 25) and patients with
chronic non-specific low back pain (n = 25) aged 30-65 years. METHODS: Subjects
performed 7 trunk movements from a seated position at non-imposed speed during 2
sessions. Nine markers on bony landmarks measured range of motion and speed of 5
spinal segments, recorded by 8 optoelectronic cameras. RESULTS: Both groups
showed good-excellent reliability in all movements for range of motion and speed
of all spinal segments (intraclass correlation (ICC), 0.70-0.96; standard error
of measurement, expressed as a percentage, 19.4-3.3%). The minimal detectable
change in the patient group was 16.7-53.7%. Range of motion and speed in all
spinal segments for trunk flexion, rotation, and flexion with rotation differed
significantly between groups (p < 0.001), with large/very large effect sizes
(Cohen's d = 1.2-2). Binary logistic regression yielded
sensitivities/specificities of 92%/84% for range of motion and 92%/80% for speed.
CONCLUSION: Kinematic variables are valid, reliable measures and can be used
clinically to diagnose chronic non-specific low back pain, manage treatment, and
as quantitative outcome measures for clinical trial interventions.

Langue : ANGLAIS