Sleepiness or fatigue: what's the difference?
These two words are often used interchangeably, even though they describe different things. Sleepiness is an involuntary tendency to fall asleep, even in ordinary, everyday situations. Fatigue, on the other hand, is a feeling of physical or mental exhaustion that doesn't necessarily lead to dozing off. You can be very tired without being sleepy, and conversely doze off easily without feeling particularly exhausted. The Epworth scale, used in the test above, measures the former specifically: the actual likelihood of falling asleep, not just feeling tired.
What are the possible causes of excessive sleepiness?
There are many possible causes of excessive daytime sleepiness. The most common are chronic sleep deprivation (insufficient sleep time over an extended period), poor sleep quality despite enough time in bed, irregular or shifted work schedules (night work, rotating shifts), certain medications (sedatives, anti-anxiety drugs, some antihistamines), or conditions such as depression. Sleep apnea is another common and often underdiagnosed cause: repeated breathing pauses fragment sleep without the person being aware of it, leading to marked daytime sleepiness. If you snore loudly or breathing pauses have already been noticed during your sleep, the STOP-BANG test can complement this result.
What is the Epworth Sleepiness Scale?
The Epworth Sleepiness Scale was developed in 1991 by Dr. Murray Johns. It asks you to rate, for 8 everyday situations, your likelihood of dozing off. It's one of the most widely used tools in sleep medicine worldwide, both in routine clinical practice and in research, as a simple and reproducible way to quantify daytime sleepiness.
What should I do based on my result?
Normal sleepiness (lower or higher end): your answers don't correspond to excessive sleepiness. Stay attentive if things change.
Mild or moderate excessive sleepiness: this isn't nothing. If this sleepiness affects your daily life, it's reasonable to discuss it with your doctor, who can look into the cause.
Severe excessive sleepiness: a medical consultation is recommended to identify the cause, especially if it affects your everyday safety (driving, work).
Why early screening matters
Excessive daytime sleepiness isn't just a discomfort: it's recognized as a risk factor for road accidents and workplace accidents, particularly among people in jobs that require sustained alertness. Identifying the cause early makes it possible, in most cases, to correct or treat it — whether that means improving sleep habits, adjusting a treatment, or screening for an underlying sleep apnea.
