Background: Studies have shown that sleep disorders occur in cystic fibrosis (CF) patients and may be present before daytime clinical manifestations.Objectives: To evaluate the presence of sleep disorders among children and adolescents with CF, attempting to identify associations with pulmonary function, nutritional status, days in hospital, and days taking antibiotics.Methods: Individuals with a diagnosis of CF aged between 6 and 18 years were included. Information on sociodemographic, clinical profile, history of hospitalizations, and use of antibiotics in the last year were collected. Spirometry, bioimpedance, and polysomnography were performed. The presence of nocturnal hypoxemia and obstructive sleep apnea syndrome (OSAS) were evaluated and participants divided according to their presence.Results: Thirty-one patients were included. The prevalence of OSAS was 32.3% and nocturnal hypoxemia was 29.0%. Average nocturnal peripheral oxyhemoglobin saturation (SpO 2 ) correlated (P < .001) with forced vital capacity (r = .55) and forced expiratory volume in the first second (r = .62). The higher the percentage of total sleep time (TST) with SpO 2 less than 90%, the lower the pulmonary function.Individuals with OSAS and nocturnal hypoxemia had lower spirometric values compared to patients without these disorders, but the nocturnal hypoxemia group also had lower Shwachman-Kulczycki score, longer hospitalization time and antibiotic use. TST with SpO 2 less than 90% was associated with length of hospitalization (r 2 = .53). Conclusion:Children and adolescents with CF have sleep disorders, including OSAS (32.3%) and nocturnal hypoxemia (29%). Individuals with nocturnal hypoxemia presented lower lung function, worse clinical score, and higher morbidity. TST with SpO 2 less than 90% was associated with length of hospitalization.

The objective of this study is to describe the knowledge of children and adolescents regarding the information disclosed by the terms of assent used in pediatric clinical research, and report the attitudes of the participants. It is an experimental study with a quantitative approach, conducted in cities in the Northeast of Minas Gerais, Brazil, with 142 participants from 7 to 15 years old, chosen for a clinical study of schistosomiasis. These children and adolescents participated in the assent process using the corresponding term. We evaluated the participants through a semi-structured questionnaire. The average knowledge of participants regarding the survey information was 41.22%, with only 1.4% having a high level of knowledge. This study concluded that most children are unaware of the information regarding the research and were unaware of their rights as research participants. Keywords: Informed consent. Research, ethics. Child-Adolescent-Comprehension. Bioethics. Resumo Conhecimento de crianças sobre o termo de assentimento livre e esclarecidoEste estudo tem como objetivo descrever o conhecimento de crianças e adolescentes sobre as informações divulgadas pelo termo de assentimento em pesquisa clínica pediátrica, além de relatar as atitudes dos participantes. Trata-se de estudo experimental com abordagem quantitativa, realizado em municípios do Nordeste de Minas Gerais com 142 participantes de 7 a 15 anos, escolhidos para estudo clínico sobre esquistossomose. Essas crianças e adolescentes participaram do processo de assentimento, com a utilização do termo correspondente. Avaliaram-se os participantes com questionário semiestruturado. O conhecimento médio dos participantes sobre as informações da pesquisa foi 41,22%, com apenas 1,4% apresentando alto grau de conhecimento. Concluiu-se que a maioria das crianças desconhece as informações sobre a investigação e seus direitos enquanto participantes de pesquisa. Palavras-chave: Consentimento livre e esclarecido. Ética em pesquisa. Criança-Adolescente-Compreensão. Bioética. Resumen Conocimientos de los niños sobre el documento de consentimiento libre e informadoEste estudio tiene como objetivo describir los conocimientos de los niños y adolescentes sobre la información divulgada por el documento de consentimiento en la investigación clínica pediátrica, además de describir las actitudes de los participantes. Se trata de un estudio experimental con un enfoque cuantitativo, llevado a cabo en ciudades del noreste de Minas Gerais, Brasil, con 142 participantes, de 7 a 15 años de edad, seleccionados para un estudio clínico sobre esquistosomiasis. Estos niños y adolescentes participaron en el proceso de consentimiento mediante el documento de consentimiento correspondiente. Se evaluó a los participantes con un cuestionario semiestructurado. El conocimiento promedio de los participantes sobre la información de la encuesta fue del 41,22%, siendo que solo un 1,4% presentó un alto grado de conocimiento. Se concluye que la mayoría de los niños desconoce las informacione...

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Objective: To assess the association of sleep disorders with the findings of heart rate variability (HRV) in children and adolescents with cystic fibrosis (CF). Methods: Cross-sectional study including children and adolescents aged six to 18 years with a clinical diagnosis of CF. Sociodemographic and clinical data were collected. Sleep disorders were evaluated using baseline nocturnal polysomnography. The autonomic nervous system (ANS) was evaluated through resting HRV. Results: A total of 30 individuals (11.2 years) with a mean forced expiratory volume in the first second (FEV1) of 62.7% were included. The respiratory disturbance index presented a median of 2.6 and obstructive sleep apnea syndrome (OSAS) was identified in 30%. In the HRV analysis, a mean standard deviation of all inter-beat (RR) intervals (SDNN) of 60.8±45.9ms was found. There was a significant correlation between the HRV low-frequency/high-frequency (LF/HF) global modulation index and the minimum SpO2 during sleep in patients with FEV1<60% (r=0.71; p=0.02). The prevalence of sleep disorders and HRV abnormalities was higher in individuals with lesser pulmonary function (FEV1<60%). Conclusions: The results indicate a weak correlation of sleep disorders (minimum SpO2) with HRV parameters (LH/HF) in children and adolescents with CF. When pulmonary function was reduced, a stronger correlation was found, highlighting the influence of disease severity. A high prevalence of ANS disorders, nocturnal hypoxemia, and presence of OSAS was also found.