The Epworth Sleepiness Scale (ESS) is a self-administered short questionnaire designed to assess daytime sleepiness. This basic test involves a self-assessment of how likely a person is to fall asleep in eight different situations. Doctors may use this test to help identify excessive daytime sleepiness. Answering the questions only takes a few minutes and can be done on paper or electronically in a wide range of different settings, including at home. These questionnaires can be seamlessly integrated into routine patient appointments.