Sleep and daytime function in people with spinal cord injury

Area of Science:

• Neurology
• Sleep Medicine
• Rehabilitation Medicine

Background:

• Spinal cord injury (SCI) significantly affects veterans' daily lives.
• Sleep disturbances are common in individuals with SCI.
• Understanding the impact of sleep issues on function is crucial for veteran care.

Purpose of the Study:

• To investigate the relationship between sleep-disordered breathing (SDB), insomnia symptoms, and sleep quality with daytime function and quality of life in veterans with SCI.
• To identify specific sleep-related factors that influence functional outcomes in this population.

Main Methods:

• A cross-sectional cohort study involving 38 male veterans with SCI was conducted at a VA medical center.
• Participants completed assessments for SDB severity (apnea-hypopnea index), insomnia symptoms (Insomnia Severity Index), sleep quality (Pittsburg Sleep Quality Index), daytime sleepiness (Epworth Sleepiness Scale), fatigue, depression, functioning (Spinal Cord Independence Measure), and quality of life (WHOQOL-BREF).
• Bivariate correlations were used to analyze the relationships between sleep parameters and functional outcomes.

Main Results:

• No significant association was found between sleep-disordered breathing severity and functional measures.
• Worse insomnia symptom severity correlated with poorer depression scores, reduced quality of life, and decreased functioning.
• Poorer self-reported sleep quality was associated with increased fatigue, depression, and diminished quality of life.

Conclusions:

• Insomnia symptoms and poor sleep quality, but not SDB severity, are linked to worse daytime function and quality of life in veterans with SCI.
• Insomnia and poor sleep quality are modifiable factors that can be targeted to improve functional outcomes.
• Further research on evidence-based insomnia treatments for individuals with SCI is warranted.