[Excessive daytime somnolence in the adult population of Warsaw].

We studied prevalence of excessive daytime somnolence (EDS) in a representative cohort of people living in Warsaw, aged 38-67y. Forty eight items questionnaire concerning sleep habits and symptoms including Epworth Sleepiness Scale assessing EDS was mailed twice to 1503 subjects. The response rate was 79%. The average sleep time on working days was 7.1 +/- 1.1h and 8.1 +/- 1.3h on week-ends. Moderate DS was found in 21% and severe DS in 7.5% of the studied group. 0.4% of studied subjects admitted falling asleep while driving a car. These figures are comparable to that reported in recent literature. There was no relation between EDS and short hours of sleep. Severe DS was twice as frequent among men than among women (p < 0.001). There was no clear-cut relations between age and EDS.