Additional file 3 of Efficacy and safety of treating chronic nonspecific low back pain with radial extracorporeal shock wave therapy (rESWT), rESWT combined with celecoxib and eperisone (C + E) or C + E alone: a prospective, randomized trial

Additional file 3. Outcome of the present study of the subgroup of patients with Pain Self-Efficacy Questionnaire (PSEQ) score < 50 at baseline (these patients could have reached the minimal clinically important difference of the PSEQ score when treating chronic nonspecific low back pain).