0 = No chance of dozing
1 = Slight chance of dozing/sleeping
2 = Moderate chance of dozing/sleeping
3 = High chance of dozing/sleeping
Sitting inactive in a public place
In a car, while stopped for a few mins in traffic
As a passenger in a car for an hour without a break
Sitting and talking to someone
Sitting quietly after lunch without alcohol
Lying down to rest in the afternoon when time permits