Sitting and Reading

0 — Would never doze+01 — Slight chance of dozing+12 — Moderate chance of dozing+23 — High chance of dozing+3

Watching TV

0 — Would never doze+01 — Slight chance of dozing+12 — Moderate chance of dozing+23 — High chance of dozing+3

Sitting, Inactive in a Public Place (e.g., Theater or Meeting)

0 — Would never doze+01 — Slight chance of dozing+12 — Moderate chance of dozing+23 — High chance of dozing+3

As a Passenger in a Car for an Hour Without a Break

0 — Would never doze+01 — Slight chance of dozing+12 — Moderate chance of dozing+23 — High chance of dozing+3

Lying Down to Rest in the Afternoon When Circumstances Permit

0 — Would never doze+01 — Slight chance of dozing+12 — Moderate chance of dozing+23 — High chance of dozing+3

Sitting and Talking to Someone

0 — Would never doze+01 — Slight chance of dozing+12 — Moderate chance of dozing+23 — High chance of dozing+3

Sitting Quietly After a Lunch Without Alcohol

0 — Would never doze+01 — Slight chance of dozing+12 — Moderate chance of dozing+23 — High chance of dozing+3

In a Car, While Stopped for a Few Minutes in Traffic

0 — Would never doze+01 — Slight chance of dozing+12 — Moderate chance of dozing+23 — High chance of dozing+3

Epworth Sleepiness Scale (ESS)