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Bone density in chronic low back pain: a pilot study

K A McGlashan

S Love

J R Jenner

A J Crisp

Addenbrooke's Hospital, Cambridge, UK

Background and objective: Levels of physical activity in chronic low back pain patients are relatively low due to their fear of provoking pain. This may have a secondary impact on maintenance of bone mass. The objective of this study is to determine if patients with chronic low back pain are at a higher risk of bone demineralization.

Design: Bone mineral density (BMD) was measured in 25 chronic low back pain patients at the lumbar spine, hip and distal forearm.

Setting: A university hospital.

Subjects: Twenty-five chronic low back pain patients (mean age 45 years) enrolled on a residential back pain rehabilitation programme.

Results: Thirteen patients (52%) were osteopenic or osteoporotic in one or more sites. BMD at the lumbar spine was generally lower than the mean BMD of age-matched subjects (p = 0.04). There was no significant relationship between BMD and duration of pain, disability, sex or previous surgical intervention.

Conclusions: Chronic low back pain patients have an increased incidence of osteopenia and osteoporosis. This finding reinforces the importance of motivating patients to incorporate exercise into daily life. Given the limited set of subjects used in the present study, further studies are required.

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