0854 Observation-based Diurnal Sleepiness Inventory (ODSI) is associated with Objective Sleepiness via Psychomotor Vigilance Task

Abstract

Abstract Introduction The Epworth Sleepiness Scale (ESS) is commonly used to assess excessive daytime sleepiness, but its accuracy is limited. In this study, we aim to compare the ESS with the Observation-based Diurnal Sleepiness Inventory (ODSI), a subjective measure of sleepiness that has been validated using the ESS in older adults, to objective measures of sleepiness obtained through the Psychomotor Vigilance Task (PVT). Despite being validated with the ESS, the ODSI has not yet been tested with objective measures of sleepiness. By comparing subjective measures of sleepiness (ODSI and ESS) to objective measures (PVT), we aim to expand the usage of ODSI to other populations. Methods 91 persons with newly diagnosed obstructive sleep apnea and not yet treated on continuous positive airway pressure (CPAP) were administered the ESS, ODSI, and PVT sleepiness tests, and the results were analyzed for correlations using linear regression. The average age was 50.48 ± 12.74, the mean body mass index (BMI) was 35.9 ± 9.3, the mean apnea hypopnea index was 30.9 ± 23.7, and 53.5% were male. The ESS and ODSI scores were run against PVT lapses and transformed average reaction time, which are the two primary outcomes of PVT. Results PVT lapses were significantly different between sleepy and non-sleepy individuals as defined by both ESS and ODSI categorization. Both the ODSI and the ESS were significantly correlated to the transformed average reaction time. The second question on the ODSI was also significantly correlated to PVT lapses as well as the transformed average reaction time. Conclusion The ODSI and ESS correlated well with objective measures of sleepiness through the PVT. The ODSI is a suitable measure of sleepiness appropriate for usage in middle-aged adults with obstructive sleep apnea. Support (if any) R00NR014675-05 (PI: Pak)