Objectives The aim of this study was to investigate sleep quality in patients with knee osteoarthritis (OA).

Methods One hundred patients with knee OA and age and gender-matched 75 healthy controls were enrolled into the study. Demographic characteristics of the participants were recorded. All patients was examined by a single physician, the findings were recorded. Knee radiographs of the patients were staged according to the Kellgren-Lawrence grading. In addition, to evaluate the clinical status and quality of life of patients was performed Western Ontario ve McMaster Universities Osteoarthritis Index (WOMAC) and Nottingham Health Profile (NHP). The sleep quality of two groups with MOS sleep scale and polysomnography (PSG) were subjectively and objectively evaluated.

Results All scores of MOS sleep scale were significantly lower in patients with knee OA than controls (p<0.001). When PSG outcomes of the patients compared with the controls,waketime during sleep period (WTSP) (37.2±35.9, 13.1±19.4 p=0.012 respectively) and number of awakeness (NOAW) (9.2±18.2, 2.6±3.5, p=0.05 respectively) were significantly higher, sleep efficiency (SE) (84.2±21.1, 96.7±4.6 p=0.009 respectively) was significantly lower in patients with knee OA. There were significantly positive correlations between MOS sleep scale and PSG (sleep period, sleep onset, REM duration and REM latans) outcomes of the patients (r:0.44–0.59 p=0.04–0.006).

In addition, MOS sleep scale scores of patients were negatively related with both NHP (pain, emotional reaction, sleep and social isolation subgroup scores) and WOMAC (total and functional) scores (r:-0.20–0.47, p=0.04–0.0001).

Conclusions The sleep quality of patients with knee OA was worse compared to healthy controls. The poor sleep and sleep quality in knee OA had adversely affected the clinical status and quality of life.

References

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2. Wilcox S, Brenes GA, Levine D, et al. Factors related to sleep disturbance in older adults experiencing knee pain or knee pain with radiographic evidence of knee osteoarthritis. J Am Geriatr Soc 2000; 48:1241.

3. Leigh TJ, Hindmarch I, Bird HA, Wright V. Comparison of sleep in osteoarthritic patients with age and sex matched healthy controls. Ann Rheum Dis 1988;47:40–2.

4. Vivien CA, Priscilla SA, Christian G. Sleep and rheumatologic disorders. Sleep medicine reviews 2008;12: 211–228.97.

5. Stewart AL, Sherbourn C, Hays RD, et al. Summary and discussion of MOS measures. Measuring functioning and well-being: The Medical Outcomes Study approach. Durham: Duke University Press, 1992:345–371.

References

Disclosure of Interest None declared