Pediatric Epworth Sleepiness Scale Calculator (ESS-CHAD)
The Pediatric Epworth Sleepiness Scale (ESS-CHAD) measures daytime sleepiness in children and adolescents aged 6 to 18. Rate how likely a child is to doze in eight everyday situations, and the calculator sums the score, places it in the correct severity band, and explains what the result means clinically. The ESS-CHAD is a validated modification of the adult ESS, adapted to situations that children and adolescents actually encounter, such as sitting in a classroom rather than driving a car.
What is the ESS-CHAD?
The Epworth Sleepiness Scale for Children and Adolescents (ESS-CHAD) is a validated self-report questionnaire that measures the general level of daytime sleepiness in young people aged 6 to 18. It was adapted from the adult Epworth Sleepiness Scale (ESS) by Murray Johns to replace situations that children cannot relate to (such as driving a car or sitting in traffic) with situations they regularly encounter, including sitting in a classroom at school and riding in a car or bus as a passenger. Question 8 specifically asks about falling asleep while eating, a situation absent from the adult version. The recall window is "over the last month." Each of the eight items is rated from 0 (would never fall asleep) to 3 (high chance of falling asleep), giving a total score of 0 to 24.
How to complete the questionnaire
For each of the eight everyday situations, select the number that best describes how likely the child is to doze off or fall asleep. Use the last month as the reference period. If the child has not been in a particular situation recently, try to imagine how they would react. Children under about 10 years old may need a parent or caregiver to help complete the scale by rating the child's observed behaviour. The test should reflect habitual daytime behaviour, not an occasional tired day. Each answer contributes 0-3 to the total; a completed scale always has a whole-number score from 0 to 24.
Why daytime sleepiness matters in children
Excessive daytime sleepiness (EDS) is one of the most common sleep-related complaints in pediatric medicine and is linked to reduced academic performance, impaired memory consolidation, mood disturbance, and increased accident risk. Common underlying causes include obstructive sleep apnea (OSA), insufficient sleep syndrome, delayed sleep-wake phase disorder, narcolepsy, idiopathic hypersomnia, depression, and certain medications. Because many children with OSA do not report tiredness but instead present with hyperactivity or inattention, a structured screening tool like the ESS-CHAD is valuable for systematically capturing subjective sleepiness across a range of passive situations. Research studies have found ESS-CHAD scores to correlate with objective sleepiness measures and with sleep-disordered breathing severity in pediatric patients.
Clinical use and limitations
The ESS-CHAD has been validated in pediatric narcolepsy populations and in general community samples using Rasch analysis. It performs comparably to the adult ESS within the age range for which it was designed. However, it is a screening instrument and cannot replace a clinical evaluation. A score above 10 does not diagnose any particular condition, and a score of 10 or below does not rule out a sleep disorder, particularly in children with obstructive sleep apnea who may underreport their own sleepiness. Clinicians typically use the ESS-CHAD alongside a sleep history, actigraphy, polysomnography, or multiple sleep latency testing when making diagnostic decisions. Scores should also be interpreted in light of the child's age, school schedule, pubertal stage, and social environment.
ESS-CHAD score interpretation
| Score range | Category | Clinical significance |
|---|---|---|
| 0-5 | Lower normal daytime sleepiness | Well within the normal range |
| 6-10 | Higher normal daytime sleepiness | Normal; upper boundary of typical range |
| 11-12 | Mild excessive daytime sleepiness | Warrants lifestyle review |
| 13-15 | Moderate excessive daytime sleepiness | Clinical assessment recommended |
| 16-24 | Severe excessive daytime sleepiness | Prompt specialist referral indicated |
Published interpretation bands for the Epworth Sleepiness Scale for Children and Adolescents (ESS-CHAD). EDS = excessive daytime sleepiness.
Frequently asked questions
What is a normal ESS-CHAD score for a child?
Scores from 0 to 10 are considered within the normal range for daytime sleepiness in children and adolescents. Scores from 0 to 5 represent lower normal sleepiness, and 6 to 10 represent higher normal sleepiness. A score above 10 is generally considered excessive daytime sleepiness and warrants further evaluation by a healthcare provider.
How is the ESS-CHAD different from the adult ESS?
The ESS-CHAD makes three key changes to the adult questionnaire: it specifies "a classroom at school" rather than a generic public place for question 3; it removes the reference to alcohol in question 7 (the original adult version asks about sitting quietly after lunch "without alcohol"); and it replaces the adult question about falling asleep "as a passenger in a car for an hour" or "stopped for a few minutes in traffic" with a question about sitting and eating a meal. These modifications make the situations more relatable to children and adolescents who do not drive.
At what age can children complete the ESS-CHAD independently?
The ESS-CHAD is designed for children and adolescents aged 6 to 18. Children under approximately 10 years old typically need assistance from a parent or caregiver to complete the scale accurately. For younger children, the caregiver rates the child's observed tendency to fall asleep in each situation. From around age 10 onwards, most children can complete the questionnaire themselves, though reviewing it together with a parent can improve reliability.
Can the ESS-CHAD diagnose sleep apnea or narcolepsy?
No. The ESS-CHAD is a screening tool that measures subjective daytime sleepiness, not a diagnostic test. A high score points toward excessive daytime sleepiness and prompts further evaluation, but it cannot identify the cause. Diagnosis of obstructive sleep apnea requires polysomnography (an overnight sleep study), and narcolepsy requires additional tests including the Multiple Sleep Latency Test and sometimes CSF hypocretin measurement. A pediatric sleep specialist will use the ESS-CHAD result as one piece of a broader clinical picture.
How often should the ESS-CHAD be repeated?
There is no fixed repeat interval. Clinicians often use it at each visit to track a child's response to treatment for a sleep disorder. For screening in a school or general pediatric setting, repeating the scale every 6 to 12 months, or whenever a parent or teacher raises a concern about sleepiness or school performance, is a practical approach. Because the questionnaire asks about the last month, re-testing more frequently than monthly may not capture meaningful change.
My child scored above 10 but sleeps 9 hours a night. What does that mean?
A high ESS-CHAD score alongside apparently adequate sleep duration suggests that the quality of sleep may be poor rather than its quantity. Obstructive sleep apnea, for instance, can severely disrupt sleep architecture and cause daytime sleepiness even when the child is in bed for a full night. Other possibilities include delayed sleep-wake phase disorder (where the child falls asleep late and wakes early for school) or fragmented sleep due to periodic limb movements. Bring this result to your child's pediatrician or a sleep specialist for evaluation.
Sources
- Janssen, K.C. et al. (2017). Validation of the Epworth Sleepiness Scale for Children and Adolescents using Rasch analysis. Sleep Medicine.
- Johns, M.W. (2015). Epworth Sleepiness Scale for Children and Adolescents (ESS-CHAD). Official ESS website.
- Sleep Foundation (2023). Epworth Sleepiness Scale: what it is and how it works.