Background Sleep disturbance is becoming increasingly recognised as a clinically important symptom in people with chronic low back pain (CLBP). However, prevalence and severity of insomnia for patients with CLBP are lacking. Also, it is not known whether high pain intensity, the most relevant condition-specific variable, is associated with higher rates of reported insomnia.
Objectives The purpose of this study was to assess prevalence and severity of insomnia in participants diagnosed with CLBP and to identify eventual factors associated with this insomnia.
Methods In this cross sectional study, One hundred patients suffering from CLBP were consecutively included (50 females and 50 males, mean age: 43.28±7.5 years). CLBP, sleep characteristics, types and consequences of insomnia were collected. Insomnia severity was assessed using index of severity of insomnia (ISI) with a global score going from 0 (the best situation) to 28 (the worst situation). Eventual relationship between insomnia and CLBP characteristics was analyzed.
Results Insomnia was reported by 78% of patients and was caused by pain in 83% of them. Insomnia was early, middle and late in respectively 85, 78 and 46% of insomniac patients. The mean of ISI score was 18.07±7.3. Consequences of this insomnia were dominated by daily activities disturbance (71%), tiredness (63%) and mood disorders (47%). Significant correlations were found between ISI and pain (r=0.587; p<0.0001), fatigue (r=0.495; p<0.0001) and body mass index (r=-0.209; p=0.03). Multiple logistic regression models have shown that only pain (OR=1.293; IC 95% (1.032- 1.618); p=0.02) and fatigue (OR=1.084; IC 95% (1.032- 1.138); p=0.001) were the significant independent factors related to insomnia severity.
Conclusions Insomnia prevalence seems to be important in patients suffering from CLBP. Consequences of this insomnia are dominated by daily activities disturbance, mood disorders and tiredness. The severity of insomnia appears to be related to pain and fatigue. Assessment of insomnia should be integrated to CLBP management and those results should be confirmed by larger studies.
Disclosure of Interest None Declared
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