Model for the mediation analysis.

<p>This model was used to analyse potential mediation between the independent variable (Pain Exposure Physical Therapy versus conventional treatment), the mediator variable (fear-avoidance beliefs or pain catastrophizing or kinesiophobia), and the dependent variable (pain-related disability or pain) [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0123008#pone.0123008.ref030" target="_blank">30</a>]. PEPT = Pain Exposure Physical Therapy. CONV = conventional treatment.</p>