The Epworth Sleepiness Scale

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bulletThe Epworth Sleepiness Scale was developed by Murray Johns at the Sleep Center at Epworth Hospital in Melbourne, Australia. It is an eight-question questionnaire that asks respondents to rate, on a scale of 0 to 3, the chance of dozing in the situations stated. Zero would equal never dozing; 1 equals a slight chance of dozing; 2 equals a moderate chance; and 3 equals a high chance of dozing. The situations stipulated are:

    1.    Sitting and reading.
    2.    Watching television.
    3.    Sitting inactive in a public place such as a theater or meeting.
    4.    Sitting as a passenger in a car for an hour or more without a break.
    5.    Lying down to read in the afternoon.
    6.    Sitting and talking to someone.
    7.    Sitting quietly after lunch (when you have had no alcohol).
    8.    Sitting in a car when stopped in traffic.

Although some of these questions may have greater importance than others, the overall scores are totalled. Less than eight means you are not really suffering from EDS, between eight and 12 indicates moderate sleepiness, whereas a score of 12 or more is considered pathologic sleepiness in need of immediate testing and treatment.

A variety of other questionnaires have been devised, and some laboratories have developed and validated their own questionnaires, tailoring them to the cultural and occupational aspects of the populations they serve.

The Epworth Sleepiness Scale