. Analgesic-intake, 0%) 936 (82.5%) 1028 (85.5%) 23.0 (26.0, 1964.

G. Anderson, Epidemiological features of chronic low-back pain, The Lancet, vol.354, issue.9178, pp.581-586, 1999.
DOI : 10.1016/S0140-6736(99)01312-4

G. Waddell, The back pain revolution. Edinburgh: Churchill Livingstone, p.266, 1998.

B. Druss, R. Rosenheck, and W. Sledge, Health and Disability Costs of Depressive Illness in a Major U.S. Corporation, American Journal of Psychiatry, vol.157, issue.8, pp.1274-78, 2000.
DOI : 10.1176/appi.ajp.157.8.1274

M. Feurstein and P. Beatie, Behavioral factors affecting pain and disability in low back pain: mechanisms and assessment, Phys Ther, vol.4, pp.267-80, 1995.

G. Waddell, M. Newton, I. Henderson, D. Somerville, and C. Main, A Fear-Avoidance Beliefs Questionnaire (FABQ) and the role of fear-avoidance beliefs in chronic low back pain and disability, Pain, vol.52, issue.2, pp.157-68, 1993.
DOI : 10.1016/0304-3959(93)90127-B

R. Buchbinder, D. Jolley, and M. Wyatt, Population based intervention to change back pain beliefs and disability: three part evaluation, BMJ, vol.322, issue.7301, pp.1516-1520, 2001.
DOI : 10.1136/bmj.322.7301.1516

URL : http://www.ncbi.nlm.nih.gov/pmc/articles/PMC33390

A. Burton, G. Waddell, K. Tillotson, and N. Summerton, Information and Advice to Patients With Back Pain Can Have a Positive Effect, Spine, vol.24, issue.23, pp.2484-91, 1999.
DOI : 10.1097/00007632-199912010-00010

L. Abenhaim, M. Rossignol, J. Valat, M. Nordin, and B. Avouac, The Role of Activity in the Therapeutic Management of Back Pain, Spine, vol.25, issue.Supplement, pp.1-33, 2000.
DOI : 10.1097/00007632-200002151-00001

R. Ostelo, M. Van-tulder, J. Vlaeyen, S. Linton, and S. Morley, Behavioural treatment for chronic low-back pain, The Cochrane Database of Systematic Reviews Issue, vol.65, issue.2, 2005.
DOI : 10.1002/14651858.CD002014.pub2

K. Hagen, G. Hilde, G. Jamtvedt, and M. Winnem, Bed rest for acute low-back pain and sciatica. The Cochrane Database of Systematic Reviews Issue, 2005.
DOI : 10.1002/14651858.cd001254.pub2

K. Hagen, G. Hilde, G. Jamvedt, and M. Winnem, The Cochrane Review of Advice to Stay Active As a Single Treatment for Low Back Pain and Sciatica, Spine, vol.27, issue.16, pp.1736-1777, 2002.
DOI : 10.1097/00007632-200208150-00010

B. Koes, M. Van-tulder, and S. Thomas, Diagnosis and treatment of low back pain, BMJ, vol.332, issue.7555, pp.1430-1434, 2006.
DOI : 10.1136/bmj.332.7555.1430

A. Malmivaara, B. Koes, L. Bouter, and M. Van-tulder, Applicability and Clinical Relevance of Results in Randomized Controlled Trials, Spine, vol.31, issue.13, pp.1405-1414, 2006.
DOI : 10.1097/01.brs.0000219868.30427.66

T. Wessels, M. Van-tulder, T. Sigl, T. Ewert, and H. Limm, What predicts outcome in non-operative treatments of chronic low back pain? A systematic review, European Spine Journal, vol.8, issue.11, pp.1633-1677, 2006.
DOI : 10.1007/s00586-006-0073-4

M. Van-tulder, A. Becker, T. Bekkering, A. Breen, and M. Del-real, Chapter 3 European guidelines for the management of acute nonspecific low back pain in primary care, European Spine Journal, vol.15, issue.S2, pp.169-91, 2006.
DOI : 10.1007/s00586-006-1071-2

M. Van-tulder, B. Koes, and A. Malmivaara, Outcome of non-invasive treatment modalities on back pain: an evidence-based review, European Spine Journal, vol.62, issue.35???36, pp.64-81, 2006.
DOI : 10.1007/s00586-005-1048-6

M. Heymans, M. Van-tulder, R. Esmail, C. Bombardier, and B. Koes, Back Schools for Nonspecific Low Back Pain, Spine, vol.30, issue.19, pp.2153-63, 2005.
DOI : 10.1097/01.brs.0000182227.33627.15

J. Hayden, M. Van-tulder, A. Malmivaara, and B. Koes, Exercise therapy for treatment of non-specific low back pain, The Cochrane Database of Systematic Reviews Issue, vol.25, issue.21, 2005.
DOI : 10.1002/14651858.CD000335.pub2

A. Breen, M. Van-tulder, B. Koes, I. Jensen, and R. Reardon, Mono-disciplinary or multidisciplinary back pain guidelines? How can we achieve a common message in primary care?, European Spine Journal, vol.49, issue.5, pp.641-648, 2006.
DOI : 10.1007/s00586-005-0883-9

J. Hayden, M. Van-tulder, and G. Tomlinson, Systematic Review: Strategies for Using Exercise Therapy To Improve Outcomes in Chronic Low Back Pain, Annals of Internal Medicine, vol.142, issue.9, pp.776-85, 2005.
DOI : 10.7326/0003-4819-142-9-200505030-00014

J. Hayden, M. Van-tulder, A. Malmivaara, and B. Koes, Meta-Analysis: Exercise Therapy for Nonspecific Low Back Pain, Annals of Internal Medicine, vol.142, issue.9, pp.765-75, 2005.
DOI : 10.7326/0003-4819-142-9-200505030-00013

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=

D. Cherkin, R. Deyo, J. Street, M. Hunt, and W. Barlow, Pitfalls of Patient Education, Spine, vol.21, issue.3, pp.345-55, 1996.
DOI : 10.1097/00007632-199602010-00019

D. Cherkin, R. Deyo, M. Battie, J. Street, and W. Barlow, A Comparison of Physical Therapy, Chiropractic Manipulation, and Provision of an Educational Booklet for the Treatment of Patients with Low Back Pain, New England Journal of Medicine, vol.339, issue.15, pp.1021-1030, 1998.
DOI : 10.1056/NEJM199810083391502

L. Roberts, P. Little, J. Chapman, T. Cantrell, and R. Pickering, The Back Home Trial, Spine, vol.27, issue.17, pp.1821-1829, 2002.
DOI : 10.1097/00007632-200209010-00002

D. Cherkin, R. Deyo, M. Battie, J. Street, and W. Barlow, A Comparison of Physical Therapy, Chiropractic Manipulation, and Provision of an Educational Booklet for the Treatment of Patients with Low Back Pain, New England Journal of Medicine, vol.339, issue.15, pp.1021-1030, 1998.
DOI : 10.1056/NEJM199810083391502

B. Udermann, K. Spratt, R. Donelson, J. Mayer, and J. Graves, Can a patient educational book change behavior and reduce pain in chronic low back pain patients?*1, The Spine Journal, vol.4, issue.4, pp.425-460, 2004.
DOI : 10.1016/j.spinee.2004.01.016

R. Hazard, S. Reid, L. Haugh, and G. Mcfarlane, A Controlled Trial of an Educational Pamphlet to Prevent Disability After Occupational Low Back Injury, Spine, vol.25, issue.11, pp.1419-1442, 2000.
DOI : 10.1097/00007632-200006010-00015

E. Coudeyre, P. Givron, V. Gremeaux, P. Lavit, and C. Herisson, Traduction fran??aise et adaptation culturelle du ????back book????, Annales de R??adaptation et de M??decine Physique, vol.46, issue.8, pp.553-560, 2003.
DOI : 10.1016/j.annrmp.2003.02.001

G. Breart and J. Bouyer, Epidemiological methods in evaluation, Rev Epidemiol Sante Publique, vol.39, pp.5-14, 1991.

M. Pfingsten, B. Kroner-herwig, E. Leibing, U. Kronshage, and J. Hildebrandt, Validation of the German version of the Fear-Avoidance Beliefs Questionnaire (FABQ), European Journal of Pain, vol.67, issue.3, pp.259-66, 2000.
DOI : 10.1053/eujp.2000.0178

K. Chaory, F. Fayad, F. Rannou, J. Fermanian, and M. Revel, Validation of the French version of the Fear Avoidance Beliefs Questionnaire (FABQ), Spine, vol.14, pp.29-908, 2004.

J. Kopec, J. Esdaile, M. Abrahamowicz, L. Abenhaim, and S. Wood-dauphinee, The Quebec Back Pain Disability Scale, Spine, vol.20, issue.3, pp.341-52, 1995.
DOI : 10.1097/00007632-199502000-00016

J. Valat, P. Goupille, S. Rozenberg, R. Urbinelli, and F. Allaert, Acute low back pain: predictive index of chronicity from a cohort of 2487 subjects. Spine Group of the Societe Francaise de Rhumatologie, Joint Bone Spine, vol.67, pp.456-61, 2000.

S. Linton, J. Vlaeyen, and R. Ostelo, The back pain beliefs of health care providers: are we fear-avoidant?, Journal of Occupational Rehabilitation, vol.12, issue.4, pp.223-255, 2002.
DOI : 10.1023/A:1020218422974

M. Roland and M. Dixon, Randomized controlled trial of an educational booklet for patients presenting with back pain in general practice, J R Coll Gen Pract, vol.39, pp.244-250, 1989.

R. Buchbinder and D. Jolley, Population based intervention to change back pain beliefs: three year follow up population survey, BMJ, vol.328, issue.7435, p.321, 2004.
DOI : 10.1136/bmj.328.7435.321

URL : http://www.ncbi.nlm.nih.gov/pmc/articles/PMC338096

C. Orr, How to minimize litigation, Br J Hosp Med, vol.42, p.439, 1989.

D. Jong, J. Vlaeyen, J. Onghena, P. Goossens, M. Geilen et al., Fear of Movement/(Re)injury in Chronic Low Back Pain, The Clinical Journal of Pain, vol.21, issue.1, pp.9-17, 2005.
DOI : 10.1097/00002508-200501000-00002

H. Raspe, C. Matthis, P. Croft, O. Neill, and T. , Variation in Back Pain Between Countries, Spine, vol.29, issue.9, pp.1017-1038, 2004.
DOI : 10.1097/00007632-200405010-00013

R. Prescott, C. Counsell, W. Gillespie, A. Grant, and I. Russell, Factors that limit the quality, number and progress of randomised controlled trials, Health Technol Assess, vol.3, pp.1-143, 1999.

M. Godwin, L. Ruhland, I. Casson, S. Macdonald, and D. Delva, Pragmatic controlled clinical trials in primary care: the struggle between external and internal validity, BMC Medical Research Methodology, vol.5, issue.3, p.28, 2003.
DOI : 10.1017/S0266462300007406

D. Jarlais, D. Lyles, C. Crepaz, and N. , Improving the Reporting Quality of Nonrandomized Evaluations of Behavioral and Public Health Interventions: The TREND Statement, American Journal of Public Health, vol.94, issue.3, pp.361-367, 2004.
DOI : 10.2105/AJPH.94.3.361

A. Harris, D. Bradham, M. Baumgarten, I. Zuckerman, and J. Fink, The use and interpretation of quasi-experimental studies in infectious diseases, CID, vol.38, pp.1586-1591, 2004.