1 Monika Šerelytė 1 Džonardas Šleiteris 1 Evelina Pajedienė2
1 Lithuanian University of Health Science, Academy of Medicine, Faculty of Medicine
2Department of Neurology, Kaunas Clinics, Hospital of Lithuanian University of Health Sciences
Backround: the Innsbruck RBD scale (RBD- I), Paris arousal disorders scale (PADSS) and REM Sleep Behavior Disorder Single-Question Screen test (RBD1Q) has been established to evaluate susceptibility and severity of symptoms and signs related to rapid eye movement sleep (REM) and non-rapid eye movement sleep (NREM) parasomnias. The Lithuanian version of these parasomnia related questionnaires (PRQ) would be helpful to indicate REM and NREM parasomnias.
Aim: to adapt the Lithuanian version of parasomnias related questionnaires (RBD- I, PADSS and RBDQ1) and evaluate its psychometric properties.
Materials and methods: 108 accidentally chosen adult participants from general population aged 18-82 met the inclusion criteria and participated in the study. All subjects completed questionnaires that included sociodemographic information, parasomnias – related questionnaires, other specific sleep questionnaires: Pittsburgh sleep quality index (PSQI), Epworth sleepiness scale (ESS), Ulanlina narcolepsy scale (UNS), the emotional status was evaluated by Hospital Anxiety and Depression Scale (HADS). The reliability of the PRQ questionnaires was examined by calculating internal consistency with Cronbach‘s α.
Results: High internal consistency coefficients were obtained for the RBD – I (Cronbach α = 0.68), pathology ≥0.25 could be suspected for 5 (4.7 %), PADSS (Cronbach α = 0,704) for 1 (0,9 %) , RBDQ1 6 (5,6 %) participants. Significant Spearman’s correlations were found between RBD – I and PADSS (p<0.01), RBD – I and RBDQ1 (p <0.01). Higher ESS score was associated with higher anxiety and depression level (p < 0.01), PSQI score – with higher anxiety and depression level (p < 0.01), and more severe sleepiness on ESS (p <0.015).
Conclusions: Lithuanian version of PADSS, RBDQ1 and RBD – I scales have good internal consistency and could be helpful in diagnostic process of REM and NREM parasomnias.
Keywords: REM sleep behavior disorder, parasomnias, sleep, sleep disorders