Low back pain is a very common disease. Among the persons suffering of acute low back pain, about 10% are at risk of developping chronic pain. A screening questionnaire assessing this risk has been developed and validated in Swedish and English (Orebro Musculoskeletal Pain Screening Questionnaire, Linton, 2003). The aim of our study is to validate a french translation of this questionnaire. Patients suffering from acute low back pain will be asked to fill in several questionnaires at day 0, and 6 and 12 month later.

Inclusion Criteria:

• all consecutive patients presenting at the clinical care setting with acute low back pain
• pain lasting for less than three months
• cumulated sick leave less thant six months

Exclusion Criteria:

• unability to sufficiently read and understand French
• presence of red flags as according to the New Zealand Acute Low Back Pain Guide

Males and females 20-55 years old suffering from acute low back pain