Excessive Daytime Sleepiness and Sleep Quality and their Impact on Health-Related Quality of Life in People with Epilepsy: A study from Pakistan

Abstract

Background: Epilepsy is one of the most common but manageable neurological disorder. The relation between epilepsy, sleep, and health-related quality of life (HRQoL) in culturally distinct environment of Pakistan remains unclear. The purpose of this study was to determine prevalence and predictors of excessive daytime sleepiness (EDS), poor sleep quality (SQ), and to analyze their association with HRQoL in people with epilepsy (PWE).

Methods: A study was conducted among PWE attending two tertiary care hospitals of Islamabad and Rawalpindi, Pakistan. The EDS, SQ, and HRQoL were evaluated by Urdu versions of Epworth Sleepiness Scale (ESS), Pittsburgh Sleep Quality Index (PSQI), and Quality of Life in Epilepsy-31 (QOLIE-31).

Results: The study included 200 PWE and 51 healthy controls with mean (SD) ages of 33.1 ± 13.9, 32.9 ± 10.9, and a disease duration of 5.01 ± 6.17, respectively. The majority of the respondents (n = 130, 65%) had poor seizure control, and most of these (n = 88, 68%) were on combination antiepileptic drug (AED) therapy. In comparison to controls, a higher number of PWE had EDS by ESS (score ≥ 11, 10% vs. 40%, p-value 0.00), and poor SQ by PSQI (score > 5, 9% vs. 71%, p-value 0.00). A multiple logistic regression analysis reveals that the factors significantly associated with EDS were: female gender; increasing age; seizure control; duration of epilepsy; and combination AED therapy. A second multiple binary logistic regression analysis suggests that factors significantly associated with poor SQ were: increasing age; female gender; poor seizure control; and combination therapy. The Hierarchical multivariate analysis suggests that poor seizure control, EDS, and poor SQ were significant predictors of low HRQoL.

Conclusion: The findings suggest high prevalence of EDS and poor SQ in PWE in Pakistan. A significant negative association exists between sleep complaints and HRQoL. During routine clinical consultations, awareness about sleep hygiene practices must be provided to enhance HRQoL.

Keywords: Epilepsy; Epworth sleepiness scale; Excessive daytime sleep; Pittsburgh sleep quality index; Sleep disorders; Sleep quality.