Poor Sleeping Habits may Increase Pain in Patients With Knee Osteoarthritis

Osteoarthritis patients who are consumed by thoughts of pain had increased central sensitization that was associated with greater pain.

Less sleep can amplify pain in patients with knee osteoarthritis (OA) - a degenerative joint disease that causes pain and swelling of joints in the hand, hips or knee.

Researchers from Johns Hopkins University School of Medicine in Baltimore, Maryland, found that OA patients who have poor sleep habits displayed greater central sensitization - an amplification of clinical pain.

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Central sensitization is a condition of the nervous system that is associated with the development and maintenance of chronic pain. The findings further showed that OA patients who catastrophize - consumed by thoughts of pain - had increased central sensitization that was associated with greater pain.

"Our study is the largest and most comprehensive examination of the relationship between sleep disturbance, catastrophizing and central sensitization in knee OA," said lead study author Claudia Campbell from the department of psychiatry and behavioral sciences.

For the study, the team analyzed 208 participants.

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Results show that the subjects with knee OA and insomnia had the greatest degree of central sensitization compared to the controls.

The team found patients with poor sleep and high catastrophizing scores reported increased levels of central sensitization.

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In turn, central sensitization was significantly associated with increased clinical pain.

"Understanding the intricate relationship between sleep, central sensitization and catastrophizing has important clinical implications for treating those with chronic pain conditions such as knee OA," the authors said.

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The study was published in Arthritis Care & Research, a journal of the American College of Rheumatology (ACR).

Source-IANS