Low repeatability of Epworth Sleepiness Scale after short intervals in a sleep clinic population

Autor: Esther I. Schwarz, Thomas Gaisl, Sira Thiel, Fabian A Grewe, Noriane A. Sievi, Ulrike Held, Matteo Bradicich, Malcolm Kohler, Maurice Roeder
Přispěvatelé: University of Zurich, Kohler, Malcolm
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: J Clin Sleep Med
Popis: STUDY OBJECTIVES: The purpose of this study was to evaluate the short-term repeatability of the Epworth Sleepiness Scale (ESS) in patients with suspected obstructive sleep apnea and to determine whether transitory sleepiness of the patient influenced ESS results. METHODS: Adult participants with suspected obstructive sleep apnea taking part in a study on the diagnostic accuracy of repeated sleep studies were eligible. For assessment of repeatability, the agreement between 2 sequential ESS scores obtained within 1 day (same-day group) or on different days within 1 week (same-week group) was evaluated. By analyzing the within-day repeatability, a possible influence of situational sleepiness on ESS results was assessed. By comparing correlations of sequential scores between both groups, a potential influence of test day–specific sleepiness on ESS results was evaluated. Data were analyzed using Bland-Altman plots, intraclass correlation coefficients, standard error of measurement analysis, and relative amounts of ESS discrepancies beyond 2, 3, 5, and 7 points. RESULTS: Forty participants (mean age, 47.7 ± 15.4 years; 67.5% men) were included in this study, with 20 in each group. Bland-Altman analysis demonstrated considerable variability of repeated scores (mean ± 1.96 × SD = 1.93 [−3.81 to 7.66]). Discrepancies of at least 3 points between sequential ESS scores were found in 48% of all participants. Comparison of ESS repeatability between both groups showed no evidence for a difference. CONCLUSIONS: A clinically relevant variability in ESS scores was found, even when repeated on the same day, possibly because of situational sleepiness influencing ESS results. Changes in ESS in response to interventions should be interpreted with caution because of its low test-retest reliability. CITATION: Grewe FA, Roeder M, Bradicich M, et al. Low repeatability of Epworth Sleepiness Scale after short intervals in a sleep clinic population. J Clin Sleep Med. 2020;16(5):757–764.
Databáze: OpenAIRE