2. Fullen BM, Baxter GD, O’Donovan BG, Doody C, Daly L, Hurley DA. Doctors’ attitudes and beliefs regarding acute low back pain management: a systematic review. Pain 2008 136:388–96.
3. Indahl A, Velund L, Reikeraas O. Good prognosis for low back pain when left untampered: a randomized clinical trial. Spine (Phila Pa 1976) 1995 20:473–7.
4. Gore M, Sadosky A, Stacey BR, Tai KS, Leslie D. The burden of chronic low back pain: clinical comorbidities, treatment patterns, and health care costs in usual care settings. Spine (Phila Pa 1976) 2012 37:E668–77.
6. Mousavi SJ, Parnianpour M, Mehdian H, Montazeri A, Mobini B. The Oswestry Disability Index, the Roland-Morris Disability Questionnaire, and the Quebec Back Pain Disability Scale: translation and validation studies of the Iranian versions. Spine (Phila Pa 1976) 2006 31:E454–9.
8. Grotle M, Brox JI, Vollestad NK. Functional status and disability questionnaires: what do they assess?: a systematic review of back-specific outcome questionnaires. Spine (Phila Pa 1976) 2005 30:130–40.
9. Million R, Hall W, Nilsen KH, Baker RD, Jayson MI. Assessment of the progress of the back-pain patient 1981 Volvo Award in Clinical Science. Spine (Phila Pa 1976) 1982 7:204–12.
11. Munro BH. Statistical methods for health care research. 5th ed. New York (NY): Lippincott Williams and Wilkins; 2005.
12. Akbari H, Satkin M, Gangi M, Akbari H, Fesharaki MG. Standardization and study of psychological properties of the HSE Stress Questionnaire. Iran Red Crescent Med J 2017 19:e40466.
https://doi.org/10.5812/ircmj.40466
13. Lawshe CH. A quantitative approach to content validity. Pers Psychol 1975 28:563–75.
14. Grace JB. Structural equation modeling and natural systems. New York (NY): Cambridge University Press; 2006.
15. Guillemin F, Bombardier C, Beaton D. Cross-cultural adaptation of health-related quality of life measures: literature review and proposed guidelines. J Clin Epidemiol 1993 46:1417–32.
16. Andersson GB, Svensson HO, Oden A. The intensity of work recovery in low back pain. Spine (Phila Pa 1976) 1983 8:880–4.
23. Fairbank JC, Couper J, Davies JB, O’Brien JP. The Oswestry low back pain disability questionnaire. Physiotherapy 1980 66:271–3.