ABSTRACT
Introduction: The prevalence of sleep disorders has increased over time, especially after the COVID-19 pandemic, and among them, insomnia and obstructive sleep apnea are the most common. However, some individual behaviors are also related to decreased sleep quality and its possible consequences. In this regard, bedtime procrastination plays an important role in decreasing the quality of sleep, which may be related to the onset of diseases such as depression, obesity and cognitive deficit. Thus, the Bedtime Procrastination Scale (BPS) was developed to measure various aspects of this phenomenon. Objective: To develop a Brazilian Portuguese version of the Bedtime Procrastination Scale and examine its psychometric properties. Methods: The data was obtained from online surveys using the Brazilian adaptation of the BPS. The validation followed the steps of preparation, translation, reconciliation of translations, back-translation, review, pre-test and validation. Exploratory Factor Analysis with the Principal Component Analysis (PCA) Technique was used to extract the factors. To assess the factorability of the generated matrix, the Kaiser-Meyer-Olkin (KMO) and Bartlett's Sphericity tests were used. KMO values above 0.8 and statistical significance (p ≤ 0.05) of the Bartlett Sphericity Test were considered adequate. Eigenvalues above 1 were used to demarcate the number of factors to be extracted. Varimax rotation was used to improve the interpretation of the extracted factors and subsequently, each item selected to represent the underlying construct were those with a factor load ≥ 0.4. Results: In a sample of 495 volunteers (Age = 31.61 (12.03), 65.9% female), the BPS was applied, with results ranging from 9 to 45. The students scored 32 (9) and the teachers 29 (10). The KaiserMeyer-Olkin test (KMO) (0.914) and Bartlett's sphericity (p <0.001) indicated the adequacy of the factorial matrix. As for the consistency of the extracted factors, there was greater precision and reliability in factor 1 (Cronbach's α 0.9). Conclusion: This research validated the Bedtime Procrastination Scale to Brazilian Portuguese. It showed that during the COVID-19 pandemic social isolation, the student and teacher body procrastinated the bedtime even without labor activities for the next day.