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Introduction: Sleep disorders have a high prevalence in the general population being currently considered as a major public health problem. In the last four decades, scientific interest in sleep patterns has steadily grown. Such studies may contribute to a better understanding of the clinical course to explore potential therapeutic interventions. This study will aim to verify the prevalence of sleep disorders in subjects assisted at the Basic Health Units (UBS's) and Family Health Program (PSF's) in Divinópolis, MG, Brazil. Methods: This research will be an observational, cross-sectional study carried out by professors and students from the University of State of Minas Gerais -UEMG, Divinópolis Unit, with subjects recruited from the UBS's and PSF's in Divinópolis-MG, between March 2016 and December 2017. These subjects will be assessed clinically and respond to the Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS), Berlin Questionnaire, SF-36 Quality of Life Questionnaire, evaluating the quality of sleep, presence of sleep disorders, excessive daytime sleepiness, risk for obstructive sleep apnea and quality of life. Discussion: Recently, sleep disorders were considered a global public health problem, affecting the quality of life of the population and influencing morbidity and mortality. The results of epidemiological studies are not only applicable in clinical practice but also in the planning and implementation of public policies and programs aimed at controlling sleep disorders and their impact on individuals and societies.

Background: Sleep disorders are increasingly recognized as an important cause of morbidity and mortality. The poor quality of sleep is among the most frequent problems which patients with cancer have during treatment. Objectives: To verify the prevalence of sleep disorders in cancer patients attended at a reference hospital in the Center-West of Minas Gerais, Brazil. Methods: This research will be a cross-sectional observational study carried out by teachers and students from University of the State of Minas Gerais – UEMG, Divinópolis Unit, with subjects recruited from a reference hospital in the Center-West of Minas Gerais from March 2018 and February 2019. These patients will be evaluated clinically and will respond to Pittsburgh Sleep Quality Index (PSQI), Insonnia Severity Index (ISI), Epworth Sleepiness Scale (ESS), Berlin Questionnaire, European Organization for Research and Treatment of Cancer core Quality of life Questionnaire (EORTHC QLQ-30) and Beck Anxiety and Depression Inventory, respectively, assessing sleep quality, presence of sleep disorders, severity and presence of insomnia, excessive daytime sleepiness, risk for obstructive sleep apnea, quality of life and levels of anxiety and depression. Discussion: Currently, subjective instruments are used to evaluate the sleep pattern in cancer patients, since there is little information investigating the sleep disorders in these subjects. Recognizing these changes is fundamental as these symptoms can negatively affect the quality of life and their daytime performance.

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