Chronic low back pain is a term used, not to describe the severity of pain, but rather the time period during which a patient has had pain. Although the point in time at which pain becomes “chronic” is arbitrary, we use three months as our limit. This choice is because studies of the natural history of low back pain indicates that 90–95% recover within a three month period and also because patients with low back pain lasting for longer than three months have a poorer prognosis and pose the largest problems in terms of management and cost (Fig. 1). In epidemiologic studies chronic pain has been defined as (a) pain that persists beyond the normal healing time for an acute injury or disease, or (b) pain related to a chronic disease, or (c) pain that emerges and persists or recurs episodically for months or years (Bonica and Chapman, 1986).
KeywordsBack Pain Chronic Pain Pain Behaviour Chronic Back Pain Chronic Pain Syndrome
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