Psychometric Properties of the Czech Version of Epworth Sleepiness Scale

Czech version

Authors: P. Schalek ¹; Z. Hornáčková ¹; J. Kraus ²; L. Hart ¹
Authors‘ workplace: Otorinolaryngologická klinika 3. LF UK a FN Královské Vinohrady, Praha ¹; Otorinolaryngologické oddělení, Nemocnice Rudolfa a Stefanie Benešov, a. s. ²
Published in: Cesk Slov Neurol N 2015; 78/111(6): 689-692
Category: Short Communication
doi: https://doi.org/10.14735/amcsnn2015689

Overview

Aim:
The Czech translation of the Epworth Sleepiness Scale is used to assess daytime sleepiness at the majority of sites concerned with sleep-disordered breathing. The aim of this study was to determine psychometric properties of the Czech version of this questionnaire.

Patients and methods:
The Czech version of the Epworth sleepiness scale was presented to 112 patients examined at the ENT department of the 3^rd Medical Faculty and University Hospital Královské Vinohrady for suspected sleep-disordered breathing and who had the limited polygraphy apnea-hypopnea index greater than or equal to five. Internal consistency of the Czech version of the questionnaire using Cronbach’s alpha and test-retest reliability (reproducibility of the test) were determined, and the patient group was compared with a control group (74 medical students).

Results:
Cronbach’s alpha was set at α = 0.808452, the resulting value of the correlation coefficient between the total score of¨the test and re-test was r = 0.968550, the results of the two-sample t-test, comparing the test results for both groups were t = 6.3949 and p value of 0.001.

Conclusion:
The Czech version of the Epworth sleepiness scale showed good psychometric properties that allow its use in routine clinical practice and research.

Key words:
sleep apnea – Epworth sleepiness scale – validity

The authors declare they have no potential conflicts of interest concerning drugs, products, or services used in the study.

The Editorial Board declares that the manuscript met the ICMJE “uniform requirements” for biomedical papers.

Sources

1. Johns MW. A new method for measuring daytime sleepiness: the Epworth sleepiness scale. Sleep 1991; 14(6): 540– 545.

2. Johns MW. Daytime sleepiness, snoring and obstructive sleep apnea. The Epworth sleepiness scale. Chest 1993; 103(1): 30– 36.

3. Bloch KE, Schoch OD, Zhang JN, Russi EW. German version of the Epworth sleepines scale. Respiration 1999; 66(5): 440– 447.

4. Chen NH, Johns MW, Li HY, Chu CC, Liang SC, Shu YH et al. Validaton of the Chinese version of the Epworth sleepiness scale. Qual Life Res 2002; 11(8): 817– 821.

5. Vignatelli L, Plazzi G, Barbato A, Ferrini‑Strambi L, Manni R, Pompei F et al. Italian version of the Epworth sleepiness scale: external validitiy. Neurol Sci 2003; 23(6): 295– 300.

6. Tsara V, Serasli E, Amfilochiou A, Constandidinis T, Christaki P. Greek version of the Epworth sleepiness scale. Sleep Breath 2004; 8(2): 91– 95.

7. Izci B, Ardic S, Firat H, Sahin A, Altinors M, Karacan I. Reliability and validitity studies of the Turkish of the Epworth sleepiness scale. Sleep Breath 2008; 12(2): 161– 168.

8. Beiske KK, Kjelsberg FN, Ruud EA, Stavem K. Reliability and validitiy of a Norwegian version of the Epworth sleepiness scale. Sleep Breath 2009; 13(1): 65– 72. doi: 10.1007/ s11325‑ 008‑ 0202‑ x.

9. Takegami M, Suzukamo Y, Wakita T, Noguchi H, Chin K, Kadotani H et al. Development of a Japanese version of the Epworth sleepiness scale (JEES) based on item response theory. Sleep Med 2009; 10(5): 556– 565. doi: 10.1016/ j.sleep.2008.04.015.

10. Pecotic R, Pavlinac Dodig I, Valic M, Ivkovic N, Dogas Z. The evaluation of the Croatian version of the Epworth sleepines scale and STOP questionnaire as screening tools for obstructive sleep apnea syndrome. Sleep Breath 2012; 16(3): 793– 802. doi: 10.1007/ s11325‑ 011‑ 0578‑ x.

11. Kopitovic I, Trajanovic N, Prodic S, Jovanovic Drvenica M, Ilic M, Kuruc V et al. The Serbian version of the Epworth Sleepiness Scale. Sleep Breath 2011; 15(4): 775– 780. doi: 10.1007/ s11325‑ 010‑ 0435‑ 3.

12. American Academy of Sleep Medicine Task Force. Sleep‑related breathing disorders in adults: recommendations for syndrome definition and measurement techniques in clinical research. Sleep 1999; 22(5): 667– 689.

13. Nguyen AT, Baltzan MA, Small D, Wolkove N,Guillon S, Palayew S. Clinical reproducibility of the Epworth Sleepiness Scale. J Clin Sleep Med 2006; 2(2): 170– 174.

14. Johns MW. Reliability and factor analysis of the Epworth sleepiness scale. Sleep 1992; 15(4): 376– 381.