Thorarinsdottir EH, Bjornsdottir E, Benediktsdottir B, et al. - Among general population samples, researchers estimated the features and prevalence of excessive daytime sleepiness (EDS) utilizing the Epworth Sleepiness Scale (ESS) and the Basic Nordic Sleep Questionnaire (BNSQ). Candidates aged 40 and older responded to questions about sleepiness, fitness, symptoms related to sleep and quality of life. A total of 1,338 patients (53% male, 74.1% response rate) engaged, 13.1% reported an increased risk of dozing off, 23.2% reported feeling sleepy and 6.4% reported both. Compared with non-sleepy individuals, the prevalence of restless leg syndrome, nocturnal gastroesophageal reflux, difficulties initiating and maintaining sleep and nocturnal sweating was higher among those reporting feeling sleepy. In addition, individuals reporting feeling sleepy had a lower quality of life and reported feeling unrested during the day more often than non-sleepy patients. Nonetheless, individuals showing an increased risk of dozing off (ESS > 10) without feeling sleepy had a symptom profile close to that of non-sleepy individuals. Therefore, reporting only the risk of dozing off without feeling sleepy may not indicate troubled sleepiness and more instruments are required to assess daytime sleepiness in addition to ESS.