Definitions of Recurrence of an Episode of Low Back Pain

Because of a lack of an agreed terminology it is very difficult to compare results between studies reporting recurrence rates or evaluating strategies to prevent recurrence. Steps to achieve consensus on recurrence and recovery definitions are required. In the interim, it is recommended that a minimum pain duration of 24 hours with a minimum pain intensity equivalent to the appropriate minimal important change for the chosen scale, be used for defining a recurrence. If disability measures are used, it is also recommended that the appropriate minimal important change be used. For recovery, a minimum duration of 1 month pain-free should be used.