Fig. 1

Scree plot of 15-item Persian Lumbar Spine Instability Questionnaire for measuring instability shows a 2-factor solution with the eigenvalues > 1 and variance > 10%
Scree plot of 15-item Persian Lumbar Spine Instability Questionnaire for measuring instability shows a 2-factor solution with the eigenvalues > 1 and variance > 10%