A prospective controlled study about sleep disorders in drug resistant epilepsy

Area of Science:

• Neurology
• Sleep Medicine

Background:

• Epilepsy is a chronic neurological disorder affecting millions worldwide.
• Sleep disturbances are frequently reported in epilepsy patients, but their specific nature in drug-resistant cases requires further investigation.
• Understanding the relationship between epilepsy, sleep disorders, and chronotype is crucial for comprehensive patient care.

Purpose of the Study:

• To compare the prevalence of sleep disorders and chronotype in patients with drug-resistant focal and generalized epilepsy against healthy controls.
• To assess the impact of epilepsy on patients' quality of life.

Main Methods:

• A cohort of 70 patients with drug-resistant epilepsy (64 focal, 6 generalized) and 70 healthy controls were recruited.
• Exclusion criteria included relevant comorbidities.
• Validated questionnaires assessed sleep disorders (e.g., Pittsburgh Sleep Quality Index, Epworth Sleepiness Score) and chronotype; quality of life was also evaluated.

Main Results:

• Patients with drug-resistant epilepsy reported significantly poorer sleep quality (median PSQI 4 vs. 3, p=0.024).
• Higher incidences of confusional arousals (30.4% vs. 8.6%), probable REM sleep behavior disorder (RBD) (10.6% vs. 1.4%), and sleep apnea risk (22.9% vs. 5.7%) were observed in epilepsy patients.
• Chronotype did not differ between groups, but lower quality of life correlated with poorer sleep quality (PSQI >5, p=0.016).

Conclusions:

• Drug-resistant epilepsy is associated with a higher prevalence of specific sleep disorders, including confusional arousals, probable RBD, and increased risk of sleep apnea.
• Sleep quality is significantly impaired in these patients, negatively impacting their quality of life.
• Further research using video-polysomnography is warranted to elucidate the underlying mechanisms, such as nocturnal seizure activity, parasomnias, or sleep-related breathing disorders, and to confirm the bidirectional relationship between sleep and epilepsy.