Objective: To analyze the association between self-perception of sleep quality and
assimilation of content covered in classes by adolescents. Methods: Epidemiological cross-sectional study conducted with 481 high-school
students (14 to 19 years), both genders, enrolled in public schools in the
city of Caruaru, Pernambuco, and selected by random cluster sampling
strategy. Analyses were conducted using the Chi-square test and binary
logistic regression. Results: 44.1% of the adolescents reported learning difficulties during classes,
77.1% slept less than eight hours per day, and 28.9% had a bad perception of
their sleep quality. Young people who studied at least one extra hour per
day out of school had less difficulty in assimilating class content
(OR=0.34; 95%CI 0.19-0.58). We also found that participants who reported a
bad perception of sleep quality were more likely to have learning
difficulties at school (OR=1.73; 95%CI 1.13-2.65) regardless of gender, age,
school shift, study time out of school, and sleeping hours. Conclusions: Perception of sleep quality was associated with learning difficulties at
school regardless of the number of sleeping and study hours.