Marco Vinicius Fernandes, JÚLIA DE MOURA SILVA, Maria de Fátima Brito Vogt, Lorrany Rosa Viola, Dannielli Rodrigues Cunha, Samantha Figueiredo Frota Fernandes,

Sleep is a basic human need able to produce physiological effects on the nervous system and other body systems. It is important for memory consolidation, thermoregulation, immune system integrity and psychological balance. In cancer patients, the phases and stages of sleep are changed for various reasons, may occur insomnia, difficulty in initiating sleep, excessive sleepiness, daytime naps and nightmares. The objective was to evaluate the quality of sleep (QS) and daytime sleepiness index (SD) of patients diagnosed with breast cancer and the influence imposed by socio-demographic characteristics, lifestyle habits and medical history. The study was cross-sectional, quantitative, which included 70 women with breast cancer history. The sample was selected in the High Complexity in Oncology Center of the Brasilia University Hospital (CACON / HUB). The following instruments were used: Evaluation Record, Visual Analogue Scale (VAS), Sleep Quality Index Pittsburgh (PSQI) and Epworth Sleepiness Scale. It was found that the average age was 51.4 years, most married, white and completed high school. In PSQI, 30% of women had good QS, 35.3% had bad quality sleep and 35.7% sleep disorder itself. In Epworth scale, 57.1% of women evaluated possessed standard SD and 42.9% excessive SD. We conclude that sleep disorders occur with high frequency and chemotherapy can negatively affect QS, they have a good perception of their sleep-wake disorders and are able to indicate intensity and duration of insomnia. There was a positive association between poor sleep quality at night and excessive SD. Sleep was a form of pleasure for 62.9% of the participants and is therefore highly included in the wellness concept and quality of life.