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STUDY OBJECTIVES: Low-sodium oxybate (LXB; calcium, magnesium, potassium, and sodium oxybates; Xywav) contains the same active moiety as high-sodium oxybates (SXBs; SXB [Xyrem] and fixed-dose SXB [Lumryz]), with 92% less sodium, and is approved in the United States for treatment of cataplexy or excessive daytime sleepiness in patients 7 years of age and older with narcolepsy, and idiopathic hypersomnia in adults. Patients with narcolepsy have increased cardiovascular risk relative to people without narcolepsy. LXB's lower sodium content is recognized by the United States Food and Drug Administration in the narcolepsy population as clinically meaningful in reducing cardiovascular morbidity compared with SXBs. The Substitution of Equal Grams of Uninterrupted Xyrem to Xywav study (NCT04794491) examined the transition experience of patients with narcolepsy switching from SXB to LXB. METHODS: Eligible participants were aged 18-80 years with narcolepsy type 1 or 2 on a stable SXB dose/regimen. After 2 weeks, participants transitioned gram-per-gram to LXB for 6 weeks, with opportunity for subsequent titration. Assessments included the Epworth Sleepiness Scale, Patient Global Impression of change, Ease of Switching Medication Scale, and Forced Preference Questionnaire. RESULTS: The study enrolled 62 participants at baseline; 60 transitioned to LXB and 54 completed the study. At baseline and end of the LXB intervention/early discontinuation, respectively, mean total doses were 8.0 and 8.0 g/night; mean Epworth Sleepiness Scale scores were 9.4 and 8.8. Most participants reported improvement (45%) or no change (48%) in narcolepsy symptoms on the Patient Global Impression of change, reported the transition to LXB was "easy" (easy, extremely easy, not difficult at all; 93%) on the Ease of Switching Medication Scale, and preferred LXB compared with SXB (79%) on the Forced Preference Questionnaire, most commonly due to the lower sodium content. CONCLUSIONS: Most participants switched from SXB to LXB with minimal modifications of dose/regimen and reported the transition process was easy. Effectiveness of oxybate treatment was maintained on LXB, and most participants preferred LXB to SXB. No new safety or tolerability issues were identified. CLINICAL TRIAL REGISTRATION: Registry: ClinicalTrials.gov; Name: An Interventional Safety Switch Study (Segue Study) of XYWAV in Narcolepsy; URL: https://classic.clinicaltrials.gov/ct2/show/NCT04794491; Identifier: NCT04794491. CITATION: Macfadden W, Leary EB, Fuller DS, Kirby MT, Roy A. Effectiveness and optimization of low-sodium oxybate in participants with narcolepsy switching from a high-sodium oxybate: data from the Substitution of Equal Grams of Uninterrupted Xyrem to Xywav study. J Clin Sleep Med. 2024;20(9):1467-1477.

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BACKGROUND: The aging population in Mexico, particularly those aged 60 and above, faces challenges in healthcare, including potentially inappropriate prescriptions of benzodiazepines. Physiological changes in older adults make precise drug prescriptions crucial. OBJECTIVE: This study aims to evaluate and compare functionality, cognition, and daytime somnolence in older adults using benzodiazepines versus non-users. Additionally, it outlines the demographic and clinical characteristics of both groups. METHODS: A cross-sectional study enrolled 162 participants aged 60 and above, categorized as benzodiazepine consumers or non-consumers. Assessment tools included Lawton's Index, Montreal Cognitive Assessment, Epworth Sleepiness Scale, and Benzodiazepine Dependence Questionnaire. Statistical analysis employed t-tests and chi-square tests. RESULTS: Benzodiazepine users (n=81) exhibited lower cognitive scores, increased sleepiness, and reduced daily living activities compared to non-users (n=81). Demographically, BZD users had lower education levels. CONCLUSION: Benzodiazepine use in older adults is associated with cognitive decline, daytime somnolence, and functional limitations, emphasizing the need for cautious prescription practices and continual monitoring. This study contributes insights into the impact of benzodiazepines on the cognitive health of older adults in Mexico.

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BACKGROUND: Uncertainty exists about the impact of OSA and its phenotypes on cardiovascular disease. RESEARCH QUESTION: Are OSA and clinical features such as daytime sleepiness associated with incident subclinical coronary atherosclerosis? STUDY DESIGN AND METHODS: In this prospective community-based cohort study, we administered a sleepiness questionnaire, actigraphy, and home sleep studies at baseline. Coronary artery calcium (CAC; 64-slice multidetector CT scan imaging) was measured at two different time points throughout the study (baseline, between 2010 and 2014, and follow-up, between 2016 and 2018). Incidence of subclinical atherosclerosis was defined as baseline CAC of 0 followed by CAC of > 0 at a 5-year follow-up visit. The association of incident CAC outcome was assessed using logistic regression. Stratified analyses based on excessive daytime sleepiness (EDS) were performed. RESULTS: We analyzed 1,956 participants with available CAC scores at baseline (mean age, 49 ± 8 years; 57.9% female; 32.4% with OSA). In covariate-adjusted analyses (n = 1,247; mean follow-up, 5.1 ± 0.9 years), we found a significant association between OSA and incidence of subclinical atherosclerosis (OR, 1.26; 95% CI, 1.06-1.48), with stronger effects among those reporting EDS (OR, 1.66; 95% CI, 1.30-2.12; P = .028 for interaction). Interestingly, EDS per se was not associated with any CAC outcome. An exploratory analysis of the square root of CAC progression (baseline CAC > 0 followed by a numerical increase in scores at follow-up; n = 319) showed a positive association for both OSA (ß = 1.084; 95% CI, 0.032-2.136; P = .043) and OSA with EDS (ß = 1.651; 95% CI, 0.208-3.094; P = .025). INTERPRETATION: OSA, particularly with EDS, predicts the incidence and progression of CAC. These results support biological plausibility for the increased cardiovascular risk observed among patients with OSA with excessive sleepiness.

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Previous studies have noted the crucial role of excessive daytime sleepiness (EDS) in the course of depressive illness, and more recently, a few studies documented its strong associations with an increased risk of suicide. While insomnia is associated with heightened emotional reactivity, suicidal behaviors, and increased relapses and recurrence. Our main hypothesis is that major depressive episodes (MDE) with insomnia and EDS are associated with more severe manifestations of depression. However, to date, no study has directly compared MDE with insomnia without EDS (Ins), and MDE with insomnia with EDS (InsEDS) using both subjective biomarkers (administration of self-assessment questionnaires for psychiatric evaluation and sleep complaints) and objective biomarkers (of sleep and circadian rhythms (using actigraphy). The InsEDS group, compared to the Ins group, exhibited significantly increased suicidal ideation, larger seasonal impacts on mood, alterations in sleep duration, weight, appetite, energy levels, and social activities throughout the year. Furthermore, they had significant delayed onset of daily activity measured with actigraphy. These findings provided new insights into the link between suicide, sleep, alertness, and biological clock. They also hold significant implications for identifying individuals with more severe depressive manifestations and for developing tailored and personalized therapeutic strategies.

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Determinar associação entre qualidade do sono (QS), sonolência diurna excessiva (SDE) e a atividade física (AF) em corredores de rua durante a pandemia deCOVID-19. Em86 voluntários, as seguintes variáveis foram avaliadas: QS (pelo Índice de Qualidade do Sono de Pittsburgh, ESE (pelaEscala de Sonolência de Epworth) e a AF (pelo aplicativo Google Fit®).Utilizou-se o teste de correlação de Pearson ou teste de correlação de Spearman. A análise de regressão linear simples foi realizada entre as variáveis que apresentaram correlação. Consideraram-se significantes os valores de p<0,05. Houve correlação entre a SDE e a contagem de passos, bem como entre a SDE e a AF. Verificou-se associação entre a SDE e a AF, mas não entre a QS e a AF.

To determine the association between sleep quality (SQ), excessive daytime sleepiness (EDS) and physical activity (PA) in amateur street runners during the COVID-19pandemic. Eighty-six volunteers were evaluated, and the analyzed variables were: SQ (By Pittsburgh Sleep Quality Index), EDS (By Epworth Sleepiness Scale), and PA (By the Google Fit® app). The data was collected remotely, via email, using Google Forms. Pearson correlation test or Spearman correlation test was used for data correlation. Simple linear regression analysis was performed between variables that showed correlation. P values < 0.05 were considered significant. There was a correlation between EDS and step count [r (p) = 0.219 (0.042)], and only an association between PA and EDS was observed. Based on the results, an association was found between EDS and PA. However, no association was found between SQ and PA.

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OBJECTIVES: To conduct cost-utility and budget impact analysis of providing Continuous Positive Airway Pressure (CPAP) therapy versus no treatment for moderate to severe obstructive sleep apnea (OSA) in Colombia from a third-party payer perspective. METHODS: We used a Markov model to assess the cost-utility and budget impact analysis of CPAP in patients over 40 years old with moderate to severe OSA. Data on effectiveness and utility values were obtained from published literature. A discount rate of 5% was applied for outcomes and costs. ICER was calculated and compared against the threshold estimated for Colombia, which is 86% of the GDP per capita. RESULTS: Over a lifetime horizon, the base case analysis showed the incremental cost per quality-adjusted life-years (QALYs) gained with CPAP therapy was COP$3,503,804 (USD$1,011 in 2020 prices). The budget impact analysis showed that the adoption of CPAP therapy in the target population would lead to a cumulative net budget impact of COP$411,722 million (USD$118,784,412 in, 2020 prices) over five years of time horizon. CONCLUSIONS: CPAP was cost-effective compared to no-treatment in OSA. According to the budget impact analysis, adopting this technology would require a budget allocation that is partially offset by reduced number of strokes and traffic accident events.

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OBJECTIVE: This study's objective was to compare the best long-term treatment, mandibular advancement device (MAD) or continuous positive airway pressure (CPAP), for patients with mild obstructive sleep apnea (OSA) in improving excessive daytime sleepiness, fatigue, mood, sustained attention, and quality of life. METHODS: This study was a single-blind, parallel, randomized clinical trial with controls. The sample was composed of individuals between 18 and 65 years of age with a body mass index of < 35 kg/m2 and apnea/hypopnea index above five and less than 15. Participants were submitted to physical examination, polysomnography, and the following questionnaires: Pittsburgh Sleep Quality Index, Berlin Questionnaire, Epworth Sleepiness Scale, Stanford Sleepiness Scale, Karolinska Sleepiness Scale, Modified Fatigue Impact Scale, Functional Outcomes of Sleep Questionnaire, Beck Anxiety Inventory, and Beck Depression Inventory. They were also presented with the following tests: maintenance of wakefulness test and psychomotor vigilance task. RESULTS: Of 79 patients, 25 were in the MAD group, 31 in the CPAP group, and 23 in the control group. Polysomnographic parameters were best normalized with CPAP compared with MAD. Fatigue was improved in the MAD and CPAP groups, with no difference between these treatments. Quality of life was also improved with both treatments, but CPAP was superior to MAD. Daytime sleepiness, mood, and sustained attention showed no difference with the interventions. Greater adherence was obtained with MAD patients than with CPAP measured by hours of use. CONCLUSIONS: Treatment with CPAP was better at normalizing polysomnographic parameters and improving quality of life in patients with mild OSA. Both treatments improved fatigue with no difference between the two treatments. Neither treatment improved daytime sleepiness, mood or sustained attention. CLINICAL TRIALS DATABASE: NTC01461486.

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Background There is uncertainty about the impact of obstructive sleep apnea (OSA) and its phenotypes on cardiovascular disease. Research Question Are OSA and clinical features such as daytime sleepiness associated with incident subclinical coronary atherosclerosis? Study Design and Methods In this prospective community-based cohort study, we performed a sleepiness questionnaire, actigraphy, and home sleep studies at baseline. Coronary artery calcium, CAC (64-slice multi-detector computed tomography) was measured at two different time points throughout the study (baseline, between 2010-2014, and follow-up, between 2016-2018). Incidence of subclinical atherosclerosis was defined as baseline CAC=0 followed by CAC>0 at a 5-year follow-up visit. The association of incident CAC outcome was assessed using logistic regression. Stratified analyses based on excessive daytime sleepiness (EDS) were performed. Results We analyzed 1,956 participants with available CAC scores at baseline (age: 49±8 years; 57.9% women; 32.4% with OSA). In covariate-adjusted analyses (n=1,247, mean follow-up=5.1±0.9 years), we found a significant association between OSA and incidence of subclinical atherosclerosis (OR=1.26; 95% CI 1.06–1.48), with stronger effects among those reporting EDS (OR=1.66; 95% CI: 1.30–2.12; p for interaction=0.028). Interestingly, EDS per se was not associated with any CAC outcome. An exploratory analysis of CAC progression (baseline CAC>0 followed by a numerical increase in scores at follow-up) (n=319) showed a positive association for both OSA (β=1.084; 95% CI: 0.032 to 2.136; p=0.043) and OSA with EDS (β=1.651; 95% CI: 0.208 to 3.094; p=0.025). Interpretation OSA, particularly with EDS, predicts the incidence and progression of CAC. These results support biological plausibility for the increased cardiovascular risk observed among patients with OSA with excessive sleepiness.

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ABSTRACT Objective: To describe the prevalence of insufficient sleep duration, long sleep latency, terminal or maintenance insomnia, subjective sleep quality, and excessive daytime sleepiness among participants of birth cohorts conducted in three Brazilian cities, and to evaluate differences in prevalence rates within cohorts according to sociodemographic characteristics. Methods: Cross-sectional analyses involving adolescents and adults participating in four birth cohorts conducted in Ribeirão Preto (RP78 and RP94), Pelotas (PEL93) and São Luís (SL97/98). Sleep duration, latency, terminal or maintenance insomnia, and subjective sleep quality were obtained through the Pittsburgh Sleep Quality Index; and excessive daytime sleepiness was assessed using the Epworth Sleepiness Scale. Differences in the prevalence of the outcomes were analyzed in each cohort according to sociodemographic characteristics (skin color, marital status, socioeconomic status, study and working at the time of the interview) stratified by sex. Results: Insufficient sleep duration was the most common outcome at the four cohorts, with higher frequency among men. Long latency was more frequently reported by young adult women in RP94 and PEL93 cohorts, and insomnia by women of the four cohorts, when compared to men of the same age. Women generally suffered more from excessive daytime sleepiness and evaluated the quality of their sleep more negatively than men. In addition to sex, being a student and working were associated with the largest number of outcomes in both sexes. Conclusion: Sleep disorders are more prevalent in women, reinforcing the need for greater investment in sleep health in Brazil, without disregarding gender and socioeconomic determinants.

RESUMO Objetivo: Descrever a prevalência de duração do sono, latência, insônia terminal, qualidade subjetiva do sono e sonolência diurna excessiva entre participantes de coortes de nascimentos realizadas em três cidades brasileiras, bem como avaliar as diferenças nas taxas de prevalência das coortes de acordo com características sociodemográficas. Métodos: Análises transversais envolvendo participantes de quatro coortes de nascimento realizadas em Ribeirão Preto (RP78 e RP94), Pelotas (PEL93) e São Luís (SL97). A duração, a latência, a insônia terminal e a qualidade subjetiva do sono foram obtidas por meio do Índice de Qualidade do Sono de Pittsburgh; e a sonolência diurna excessiva foi avaliada pela Escala de Sonolência de Epworth. As diferenças na prevalência dos desfechos foram analisadas em cada coorte segundo características sociodemográficas estratificadas por sexo. Resultados: A duração insuficiente do sono foi o desfecho mais comum nas quatro coortes, com maior frequência entre os homens. Latência longa foi mais frequentemente relatada por mulheres adultas jovens nas coortes RP94 e PEL93, e insônia por mulheres das quatro coortes, quando comparadas a homens da mesma idade. As mulheres geralmente sofriam mais com sonolência diurna excessiva e avaliavam a qualidade do sono de forma mais negativa do que os homens. Além do sexo, ser estudante e trabalhar estiveram associados ao maior número de desfechos em ambos os sexos. Conclusão: Os distúrbios do sono são mais prevalentes em mulheres, reforçando a necessidade de maior investimento na saúde do sono no Brasil, sem desconsiderar gênero e determinantes socioeconômicos.

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BACKGROUND: Obstructive sleep apnea (OSA) represents an important occupational health concern in the transportation industry, affecting a substantial percentage of transportation operators. Our study aims to determine the frequency of individuals at high risk of obstructive sleep apnea, and excessive daytime sleepiness, as well as any potential association between these conditions and traffic accidents among a sample of Ecuadorian bus drivers. METHODS: We conducted a cross-sectional study involving 340 commercial bus drivers from Ecuador. Descriptive statistics were used to determine frequency and proportions for demographic and clinical variables. A Kendall's tau-b was performed to ascertain the relationship between the STOP-Bang score towards the Epworth Sleepiness Scale (ESS) score and the number of accidents and near accidents. RESULTS: In general, 18.5% (n = 63) of participants were found to be at high-risk for OSA. There was a weak positive correlation between STOP-Bang score and ESS score (τb = 0.244, p = .000). We also found a statistically significant, although negligible, correlation between the STOP-Bang score and the number of accidents (τb = 0.096, p = .039) and near accidents (τb = 0.120, p = .008). CONCLUSION: Our results suggest that a considerable proportion of Ecuadorian bus drivers were at high-risk for obstructive sleep apnea. Higher STOP-Bang scores were correlated with an increased number of accidents and near accidents. Additional studies are needed to determine whether additional interventions could increase road safety by taking care of undiagnosed and untreated OSA cases in a timely manner.

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There is evidence that circadian misalignment is linked with an increased risk of stroke and that circadian preference is linked with rehabilitation outcomes after stroke. Circadian preferences refer to preferences based on individuals' characteristics in respect of the timing of physiological functions that are typically assessed by self-report questionnaires. This study set out to explore this relationship by examining whether there was an association between circadian preference and stroke characteristics in a sample of stroke outpatients, considering the time of stroke onset, the topography of the stroke and the resulting disability. We also examined whether sleep complaints (snoring, insomnia, sleep apnea) were associated with circadian preferences (i.e., morning-, evening-, and intermediate-types). We also compared circadian preferences and comorbidities in this sample, matched by age and sex, with those of healthy controls who took part in an epidemiological study (EPISONO) comprising a representative sample of the population of the city of São Paulo, Brazil. Most of our sample in both groups were morning-type, and in the stroke group, ischemic stroke was the most common type. There was an increased risk for sleep apnea among evening-types, and a higher prevalence of diabetes in the evening- and intermediate-types. We found no association between circadian preference and the time of stroke onset, or with wake-up stroke. We found a low prevalence of evening-type participants in our sample of controls (2.9%) and in the stroke group (1.7%). This investigation showed a similar circadian preference (morning-types) in stroke outpatients and the general population.

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AIM: To estimate the prevalence of poor sleep quality and excessive daytime sleepiness (EDS) among college students and to analyse their association with aspects of mental health. SUBJECTS AND METHODS: A cross-sectional study carried out with 1113 college students, enrolled in full-time courses at a public university in the Mid-West region of Brazil. Data were collected through a self-administered questionnaire with questions about demographics, socioeconomics, mental health, sleep quality, and EDS. Measurements of weight and height were taken to assess weight status using the body mass index. Multivariate logistic regression models were used to estimate the associations between perceived stress (classified as light, moderate, and high) and presence of depressive symptoms with poor sleep quality and presence of EDS. RESULTS: High prevalence of poor sleep quality (65.5%) and EDS (55%) was observed. In the adjusted models, poor sleep quality was significantly associated with moderate and high perceived stress and presence of depressive symptoms. For EDS, there was also a significant association with moderate and high perceived stress and presence of depressive symptoms. CONCLUSIONS: High prevalence of poor sleep quality and EDS was found among college students. Perceived stress and presence of depressive symptoms were significantly associated with both evaluated outcomes.

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Objective: To report the successful use of lisdexamfetamine in the management of narcolepsy. Methods: Five narcoleptic patients received lisdexamfetamine, at different dosages and for different periods, for management of excessive daytime sleepiness and weight control. Results: All patients experienced improvement of excessive daytime sleepiness and lost weight without side effects. Conclusion: Lisdexamfetamine appears promising for the treatment of two of the most common symptoms of narcolepsy: excessive daytime sleepiness and weight gain.

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Resumo: Introdução: O objetivo deste estudo foi mensurar os níveis de fadiga e SED em estudantes internos de um curso de Medicina, bem como analisar os fatores sociodemográficos e pessoais associados. Métodos: Trata-se de um estudo transversal analítico com abordagem quantitativa. Os participantes da pesquisa foram alunos do internato da PUC Goiás, período que corresponde aos dois últimos anos de curso. Para o desenvolvimento da pesquisa, utilizaram-se três instrumentos: um questionário sociodemográfico com perguntas direcionadas ao fenômeno investigado, a Escala de Sonolência de Epworth (ESE) e a Escala de Fadiga de Chalder. Resultados: Foram incluídos na pesquisa 116 estudantes internos do curso de medicina da PUC Goiás. A média de idade foi de 24,3 (±8,4) anos. Quanto ao sexo, 31,9% da amostra foi composta pelo sexo masculino, e 68,1%, feminino. Quando se analisou o nível de fadiga, observou-se a presença considerável de fadiga em 99 (85,3%) dos internos. Na comparação entre fadiga e os aspectos sociodemográficos, constatou-se que a variável sexo obteve associação significativa, com maiores escores em alunos do sexo feminino (p = 0,035). Já na comparação da fadiga com os aspectos pessoais, observou-se associação significativa da fadiga com os que afirmaram: praticar atividades físicas raramente (p = 0,0038), praticar atividade artística às vezes (p = 0,034), fazer atividade turística às vezes (p = 0,022), ter doença psiquiátrica (p = 0,0006), ter dificuldades para dormir (p < 0,0001), não ser fumante (p = 0,011), fazer uso de substâncias que alteram o sono (p = 0,028) e não estar satisfeito com o próprio rendimento acadêmico (p < 0,0001). Quanto à análise da sonolência excessiva diurna, perceberam-se níveis consideráveis de sonolência em 62 (53,4%) dos estudantes, e o escore médio entre os internos participantes foi de 11,2. Na comparação dos aspectos sociodemográficos dos participantes do estudo com os níveis de SED, identificou-se maior escore no sexo feminino (p = 0,041). Quando se comparou a SED com os aspectos pessoais dos estudantes, observou-se associação significativa entre os alunos que referiram ter dificuldade para dormir (p = 0,039) e aqueles que não estavam satisfeitos com o próprio rendimento acadêmico (p = 0,027). Por fim, a análise de correlação de Pearson foi realizada entre os níveis de fadiga e os níveis de SED dos 116 estudantes internos de medicina pesquisados e identificou com significância estatística uma moderada correlação positiva (r = 0,3779) entre esses dois agravos (p < 0,0001). Conclusão: Os dados apontaram que aspectos sociodemográficos e pessoais dos discentes exercem influência direta sobre os seus níveis de fadiga e SED. Tal evidência é de suma relevância, já que fadiga e SED podem trazer consequências negativas para os acadêmicos. Um melhor conhecimento da associação positiva entre fadiga e SED, bem como os fatores associados a esses agravos, permite uma abordagem dessa problemática por parte das instituições de ensino superior, visando aos melhores desfechos na qualidade de vida dos discentes e futuros profissionais médicos.

Abstract: Introduction: To measure the fatigue and excessive daytime sleepiness (EDS) levels in medical internship students, as well as to analyze associated sociodemographic and personal factors. Methods: This is an analytical cross-sectional study with a quantitative approach. The study participants were medical internship students from PUC Goiás, a period that corresponds to the last two years of the medical course. Three instruments were used for the study development: a sociodemographic questionnaire with questions directed to the investigated phenomenon, the Epworth Sleepiness Scale (ESS) and the Chalder Fatigue Scale. Results: A total of 116 internship students from PUC Goiás medical school were included in the study. The mean age was 24.3 (± 8.4) years. Regarding gender, 31.9% of the sample consisted of males and 68.1% of females. When analyzing the level of fatigue, the considerable presence of fatigue was observed in 99 (85.3%) of the internship students. When comparing fatigue with the sociodemographic aspects of the analyzed students, it was observed that the gender variable showed a significant association, reaching higher scores in female students (p = 0.035). When comparing fatigue with the students' personal aspects a significant association with fatigue was observed among students who stated: rarely practicing physical activities (p = 0.0038); sometimes practicing artistic activities (p = 0.034); sometimes doing tourist activities (p = 0.022), having a psychiatric illness (p = 0.0006); having difficulty sleeping (p <0.0001); not smoking (p = 0.011); using sleep-altering substances (p = 0.028) and not being satisfied with their academic performance (p <0.0001). As for the analysis of EDS, considerable levels of sleepiness were observed in 62 (53.4%) students, and the mean score among the participants was 11.2. When evaluating the sociodemographic aspects of the study participants regarding EDS, it was observed that higher levels were again found in females (p = 0.041). Compared the EDS with the students' personal aspects , a significant association was observed in students who reported having difficulty sleeping (p = 0.039) and students who were not satisfied with their academic performance (p = 0.027). Finally, Pearson's correlation analysis was performed between fatigue levels and EDS levels of the 116 medical internship students analyzed and identified a positive moderate correlation with statistical significance (r = 0.3777) between these two disorders (p <0.0001). Conclusion: Data showed that the students' sociodemographic and personal aspects have a direct influence on their fatigue and EDS levels. Such evidence is of the utmost importance, as fatigue and EDS can have negative consequences for medical students. Having better knowledge about the correlation between these disorders, as well as the factors related to them, allows the approach of this problem by higher education institutions, aiming at better outcomes regarding the quality of life of students and future professionals.

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RESUMEN Introducción: La somnolencia diurna excesiva (SDE) puede llegar a interferir en el desempeño académico y profesional, debido a que las personas afectadas tienden a quedarse dormidas en situaciones que exigen un alto nivel de atención. Los estudiantes de Medicina representan una población en riesgo de SDE, dada la exigencia académica de numerosas horas de estudio, debido al gran número de créditos por asignatura contenidos en el plan de estudios del programa académico, las prácticas docentes asistenciales y los turnos nocturnos, que pueden generar privación o déficit acumulado del sueño. Por esta razón, es importante estimar la prevalencia de SDE y los factores asociados en estudiantes de Medicina de una institución de educación superior (IES) de Bucaramanga, con el objetivo de implementar estrategias de prevención primaria que disminuyan la presentación de este problema y mejoren la calidad de vida y el desempeño académico de los estudiantes. Material y métodos: Estudio transversal analítico observacional, con una muestra poblacional de 458 estudiantes de Medicina matriculados en el segundo semestre de 2015 en la Universidad Autónoma de Bucaramanga (UNAB), quienes respondieron a 4 cuestionarios: variables sociodemográficas, escala de somnolencia de Epworth, índice de calidad del sueño de Pittsburg (ICSP) e índice de higiene del sueño (IHS). Se realizó el análisis bivariable y multivariable en busca de asociación con SDE. Resultados: Los estudiantes tenían una media de edad de 20,3 arios; de los 458 encuestados, el 62,88% eran mujeres. Se estableció que el 80,75% de los participantes tenían SDE y el 80,55%, una percepción negativa de la calidad del sueño (OR = 1,91;IC95%, 1,11-3,29; p = 0,019). En el análisis multivariable, se encontró que el hecho de estar cursando ciencias clínicas disminuye el riesgo de SDE respecto a quienes estaban cursando el ciclo básico. Además, se observó que una puntuación > 15 en el IHS aumenta de manera significativa el riesgo de padecer SDE. Conclusiones: Aunque es frecuente encontrar SDE en los estudiantes de Medicina, solo un pequeño porcentaje de ellos sufren la forma severa de este trastorno del sueño. Estar cursando asignaturas del ciclo básico se asocia con mayor riesgo de SDE, por lo cual es importante que los comités curriculares de las IES evalúen regularmente la cantidad de horas de trabajo supervisado e independiente que realizan los estudiantes de Medicina. Finalmente, es importante emprender campañas orientadas a mejorar la percepción de riesgo sobre el uso de bebidas energizantes de los estudiantes universitarios y realizar, desde el ingreso al programa académico, recomendaciones sobre los hábitos de higiene del sueño.

ABSTRACT Introduction: Excessive daytime sleepiness (EDS) can interfere with academic and professional performance, as affected individuals tend to fall asleep in situations that demand a high level of alertness. Medical students are often a population at risk of suffering from EDS due to the demanding number of study hours, the significant number of credits per subject in the academic curriculum, practical teaching sessions and hospital night shifts, which can lead to sleep deprivation or sleep debt. It is for these reasons that it is important to estimate the prevalence of EDS and its associated factors in medical students of a Higher Education Institution (HEI) in Bucaramanga, in order to implement early prevention strategies to reduce the occurrence of this problem and to improve the students' quality of life and academic performance. Material and methods: An observational, cross-sectional analytical study with a population sample of 458 medical students enrolled in the second semester of 2015 at the Universidad Autonomade Bucaramanga (UNAB), who completed four questionnaires: Sociodemographic Variables, Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index and Sleep Hygiene Index (SHI). A bivariate and multivariate analysis was performed to identify any correlations with EDS. Results: Mean student age was 20.3 years and 62.88% of the 458 respondents were women. We were able to establish that 80.75% of participants suffered from EDS and 80.55% had a negative perception of their sleep quality (OR=1.91; 95% CI, 1.11-3.29; p =0.019). In the multivariate analysis, it was found that the risk of EDS is lower in the clinical sciences than in the basic cycle. Furthermore, it was noted that a score higher than 15 in the Sleep Hygiene Index significantly increases the risk of suffering from EDS. Conclusions: Although EDS is very common in medical students, only a small percentage present the most severe form of this sleep disorder. Being enrolled in basic cycle subjects is associated with a higher risk of suffering EDS, so it is important for the curriculum committees of higher education institutions to regularly evaluate the number of hours of supervised and independent work performed by medical students. Finally, it is important to implement campaigns aimed at improving university students' perception of the risk of taking energy drinks and to establish sleep hygiene recommendations from the start of the academic programme.

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INTRODUCTION: Excessive daytime sleepiness (EDS) can interfere with academic and professional performance, as affected individuals tend to fall asleep in situations that demand a high level of alertness. Medical students are often a population at risk of suffering from EDS due to the demanding number of study hours, the significant number of credits per subject in the academic curriculum, practical teaching sessions and hospital night shifts, which can lead to sleep deprivation or sleep debt. It is for these reasons that it is important to estimate the prevalence of EDS and its associated factors in medical students of a Higher Education Institution (HEI) in Bucaramanga, in order to implement early prevention strategies to reduce the occurrence of this problem and to improve the students' quality of life and academic performance. MATERIAL AND METHODS: An observational, cross-sectional analytical study with a population sample of 458 medical students enrolled in the second semester of 2015 at the Universidad Autonoma de Bucaramanga (UNAB), who completed four questionnaires: Sociodemographic Variables, Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index and Sleep Hygiene Index (SHI). A bivariate and multivariate analysis was performed to identify any correlations with EDS. RESULTS: Mean student age was 20.3 years and 62.88% of the 458 respondents were women. We were able to establish that 80.75% of participants suffered from EDS and 80.55% had a negative perception of their sleep quality (OR=1.91; 95% CI, 1.11-3.29; p =0.019]. In the multivariate analysis, it was found that the risk of EDS is lower in the clinical sciences than in the basic cycle. Furthermore, it was noted that a score higher than 15 in the Sleep Hygiene Index significantly increases the risk of suffering from EDS. CONCLUSIONS: Although EDS is very common in medical students, only a small percentage present the most severe form of this sleep disorder. Being enrolled in basic cycle subjects is associated with a higher risk of suffering EDS, so it is important for the curriculum committees of higher education institutions to regularly evaluate the number of hours of supervised and independent work performed by medical students. Finally, it is important to implement campaigns aimed at improving university students' perception of the risk of taking energy drinks and to establish sleep hygiene recommendations from the start of the academic programme.

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This study aimed to verify the prevalence and factors associated with excessive daytime sleepiness (EDS) among adolescents. In all, 1.132 people participated. They were aged between 14 and 19 years, of both sexes and they came from a city in southern Brazil. Many socio-demographic variables were collected (sex, age group, socioeconomic status, period of study, year of school and work), also variables related to their health (level of physical activity, alcohol intake, smoking, misuse of medicines, stress control, duration of sleep, sedentary behavior and self-rated health) and EDS, through the Pediatric Daytime Sleepiness Scale (PDSS). The prevalence of EDS in general sample was 54.2% and average score in PDSS was 16.0 (5.7). Comparing results between both sexes, female sex presents the higher prevalence of EDS (64.3%) and greatest average PDSS score 17.5 (5.4) compared to male sex (35.7%) with 14.5 (5.6%) score (p < .001). In analysis of the prevalence ratio, using 15 as an EDS cut-off point, prevalence was 35% higher in the female sex (PR = 1.35 CI 95% 1.08-1.69, p = .010). In addition, adolescents which had lower self-rated health (PR = 1.24 CI 95% 1.01-1.52, p = .038), low stress control (PR = 1.28 CI 95% 1.05-1.57, p = .014) and short sleep duration (PR = 1.30 CI 95% 1.02-1.65, p = .029), presented higher prevalence of EDS. High prevalence of EDS was identified, being more common in young women. Adequate sleep, greater stress control and better health perception should be promoted among Brazilian adolescents.

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Fabry disease is a progressive disease characterized by an enzymatic deficiency of acid alpha-galactosidase and glycosphingolipids storage within the lysosomes. The disease has two phenotypes: classic and nonclassic. Excessive daytime sleepiness is a common sign reported by patients and can be caused by a circadian rhythm sleep disorder. Activity and rest cycle, variation of body temperature and melatonin biosynthesis are known rhythmicity markers. In the face of these evidences, our goal was to evaluate the rhythmic profile in Fabry's disease patients using rhythmicity markers. For this purpose, we recruited 17 patients diagnosed with Fabry disease (11 classic and 6 nonclassic variant) that answered the Epworth Sleepiness Scale and the Morningness-Eveningness questionnaire adapted from Horne and Ostberg; recorded activity and body temperature rhythms by an actigraphy during at least 10 days and collected urine to assess 6-sulfatoxymelatonin excretion load during the day (from the second urine in the morning until 7 p.m.) and night (starting from 7 p.m. until the first urine in the morning of the following day). We observed that control subjects presented higher excretion load of 6-sulfatoxymelatonin during the night (p < 0.05, d = 7.8), as expected. Patients with the nonclassic variant presented an inversion on 6-sulfatoxymelatonin daily profile (p < 0.05, d = 3.8) and there was no difference between the day and night profile of classic variant patients when compared to the other two groups. Patients with the classic variant also presented temperature period greater than 24 hours (p < 0.05, d = 2.0). Therefore, we came to the conclusion that there is an alteration in the circadian rhythms in Fabry disease patients, evidenced by modifications in the 6-sulfatoxymelatonin daily profile and in the body temperature rhythm period.

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BACKGROUND AND PURPOSE: Excessive daytime sleepiness (EDS) is a common complaint among patients with Parkinson's disease (PD). Several factors have been associated with EDS in PD, especially neuropsychiatric symptoms. This study aimed to determine the relationships between neuropsychiatric symptoms, sociodemographic and clinical parameters, and EDS in PD. METHODS: This cross-sectional study analyzed 85 patients with PD. All patients underwent socioeconomic and clinical data evaluations followed by a psychiatric interview and a neurological examination, including the assessment of sleep features. Patients were divided into two groups according to the presence or absence of EDS, which was defined as a score higher than 10 on the Epworth Sleepiness Scale. Binary logistic regression was performed in order to describe the predictors of EDS. RESULTS: We found that EDS affects 40% of PD patients and is associated with older age, restless legs syndrome, depressive and anxious symptoms, and worse sleep quality. In the multivariate analysis, older age, levodopa use, and worse sleep quality remained as significant predictors of EDS in PD. CONCLUSIONS: Nighttime sleep problems, older age, and levodopa use are significantly associated with EDS in PD. A careful assessment and the management of sleep problems in PD patients might help to improve their quality of life.

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Myotonic dystrophy (MD) is a neuromuscular disease with myotonia, progressive weakness, and involvement of CNS, heart, and gastrointestinal system. Excessive daytime sleepiness (EDS) in myotonic dystrophy type 1 (MD1) is related to sleep breathing diseases, restless leg syndrome, periodic limb movements during sleep and narcoleptic-like phenotype. However, authors highlight a central dysfunction of sleep regulation. We describe a 26-year-old, female, MD1 patient with EDS. Sleep diary/actigraphy evidenced two different circadian periods with values of 1442 and 1522 min. Agomelatine, 50 mg at night, was prescribed with improvement of the circadian rhythm and complaints of sleepiness. The identification of unanticipated causes of EDS, such as circadian rhythm disorders permits an appropriated treatment. As we know, it is the first relate of non-24-h sleep-wake disorder in patient with MD1. Sleep diary and actigraphy could be good options to investigate sleep-wake cycle disorder in patients with MD and EDS.

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