Epworth Sleepiness Scale - An Overview

Introduction:

The ESS helps to understand how likely someone is to fall asleep in everyday situations. The test includes eight scenarios, each rated on a scale from 0 (no chance of dozing) to 3 (high chance of dozing). After completing the test, all obtained scores were added. The scores range from 0 to 24. This score helps estimate those with excessive sleepiness issues and detect cases that may require medical attention.

What Is the Epworth Sleepiness Scale (ESS)?

The Epworth sleepiness scale (ESS) is a brief questionnaire used to evaluate daytime sleepiness. It asks people to rate how likely they are to doze off in eight different situations. Healthcare professionals use this tool to help identify cases of excessive daytime sleepiness.

This scale is not a diagnostic tool for sleep disorders but is used to gauge the extent of daytime sleepiness and how it may affect daily functioning. The patient usually completes this self-assessment before undergoing a sleep study.

When Is It Appropriate to Use the Epworth Sleepiness Scale?

Doctors use the Epworth sleepiness scale for the following reasons.

• Assess the impact of daytime sleepiness on daily activities.
• Monitor changes in sleepiness before and after treatment or any medication.
• Determine if additional tests are needed to diagnose conditions (for example, sleep apnea or narcolepsy).

The Epworth sleepiness scale is not a diagnostic tool for sleep disorders. It is used to gauge the extent of daytime sleepiness and how it may affect daily functioning. Patients with sleep-related conditions complete this self-assessment before undergoing a sleep study.

What Does the Epworth Sleepiness Scale Questionnaire Include?

The Epworth sleepiness scale questionnaire consists of eight questions, each with a scoring system of 0 to 3. Following are some situations associated with sleepiness:

1. Sitting and Reading.

• No chance of dozing (score 0).
• Slight chance of dozing (score 1).
• Moderate chance of dozing (score 2).
• High chance of dozing (score 3).

2. Watching Television.

• No chance of dozing (score 0).
• Slight chance of dozing (score 1).
• Moderate chance of dozing (score 2).
• High chance of dozing (score 3).

3. Sitting Inactive in a Public Place (For Example, in a Meeting, Theater, Or Dinner Event)

• No chance of dozing (score 0).
• Slight chance of dozing (score 1).
• Moderate chance of dozing (score 2).
• High chance of dozing (score 3).

4. Sitting for an Hour as a Passenger in a Car (Without Stopping For a Break).

• No chance of dozing (score 0).
• Slight chance of dozing (score 1)
• Moderate chance of dozing (score 2).
• High chance of dozing (score 3).

5. Lying Down in the Afternoon to Rest.

• No chance of dozing (score 0).
• Slight chance of dozing (score 1).
• Moderate chance of dozing (score 2).
• High chance of dozing (score 3).

6. Sitting and Talking to Another Person.

• No chance of dozing (score 0).
• Slight chance of dozing (score 1).
• Moderate chance of dozing (score 2).
• High chance of dozing (score 3).

7. Sitting Quietly After Lunch (No Alcohol at Lunch).

• No chance of dozing (score 0).
• Slight chance of dozing (score 1)
• Moderate chance of dozing (score 2).
• High chance of dozing (score 3).

8. Sitting in a Car, Stopped for a Few Minutes Because of Traffic.

• No chance of dozing (score 0).
• Slight chance of dozing (score 1).
• Moderate chance of dozing (score 2).
• High chance of dozing (score 3).

How to Interpret Epworth Sleepiness Scale Test Results?

The ESS or Epworth sleepiness scale scores range from number 0 to 24. Scores between 0 and 10 suggest normal daytime sleepiness. Scores below 10 might indicate sleep problems like insomnia. Epworth sleepiness scale scores from 11 to 24 suggest excessive daytime sleepiness.

Epworth sleepiness scale interpretation of different scores -

• 0 to 5: Low daytime sleepiness (normal).
• 6 to 10: Elevated daytime sleepiness (still within normal range).
• 11 to 12: Mild excessive daytime sleepiness.
• 13 to 15: Moderate excessive daytime sleepiness.
• 16 to 24: Severe excessive daytime sleepiness.

Things to keep in mind when looking at the Epworth sleepiness scale:

• If a patient scores above 11 on the ESS scale, the doctor may suggest doing additional diagnostic tests.
• These tests are used to find out what is causing daytime sleepiness in an individual.
• Excessive daytime sleepiness itself is a symptom. It is not considered a medical condition.

What Are the Symptoms of Excessive Daytime Sleepiness?

Excessive daytime sleepiness (EDS) symptoms involve drowsiness when someone needs to be awake and alert. This sleepiness issue can affect up to 25 percent of people. It can impair concentration and reduce performance at work and school. It also raises the risk of serious accidents, including those that occur while driving.

The major reasons behind excessive daytime sleepiness are:

• Insufficient sleep due to long working hours and overtime can lead to sleepiness.
• Anxiety can cause sleepless nights, and it can also lead to daytime sleepiness.
• Depression drains energy, which contributes to feeling tired.
• Substances like alcohol, caffeine, tranquilizers, sleeping pills, and antihistamines can disrupt sleep patterns.
• Medical conditions like acid reflux, hypothyroidism, nocturnal asthma, and chronic pain can interfere with getting proper sleep.

What Are the Advantages of the Epworth Sleepiness Scale?

• The Epworth sleepiness scale results show strong internal consistency (with Cronbach’s alpha ranging from 0.73 to 0.90).
• This sleepiness test has demonstrated high validity and reliability in various studies.
  • Validity: This term refers to how well the ESS measures what it is intended to measure (for example, daytime sleepiness).
  • Reliability: This term refers to the consistency of the results over time.
• Adaptations to items 4 and 8 are made for cross-cultural use, especially where driving is not applicable. However, the internal consistency of the results is still high.

Can Children and Adolescents Use the Epworth Sleepiness Scale?

The Epworth sleepiness scale was originally made for adults but can also be used for teenagers. There is a special version for kids called the ESS-CHAD (Epworth Sleepiness Scale for Children and Adolescents). It works similarly to the adult version but has some changes in the questions. Children under ten usually need an adult's help to complete the ESS-CHAD.

• The ESS-CHAD has many similarities to the adult ESS. This scale has modifications to suit children and adolescents better.
• Instructions and activity descriptions are framed in a simplified way for better understanding.
• The review period is mentioned as ‘over the last month.’
• Reference to alcohol is removed from question number 7.
• Question 3 specifies ‘a classroom at school’ as a public place.
• Question 8 is replaced with a question about falling asleep while sitting and eating.

Conclusion:

The Epworth sleepiness scale is a vital tool to measure how sleepy someone feels during the day. It helps doctors identify sleep disorders early and decide on the right tests and treatments. This scale is performed along with other assessments to get a complete picture. ESS is an important resource for doctors and researchers.