TABLE 1—

Definitions of Subgroups of Current Smokers

Some-day (SD) smokers
Initiator	Smoker who has smoked for less than 5 years.
Stable-pattern	Noninitiator who was a some-day smoker 12 months prior and who has not smoked daily for:
Long-term	At least 5 years.
Short-term	At least 1 but no more than 5 years.
Transitional	Noninitiator who was not a SD smoker 12 months prior.
Toward less intensive smoking	SD smoker 12 months prior.
Toward more intensive smoking	Did not smoke at all 12 months prior.
Direction unclear	Direction cannot be ascertained.
Unclassified	Noninitiator who cannot be otherwise classified.
Every-day Smokers
Initiator	Smoker who has smoked for less than 5 years.
Stable-pattern	Noninitiator who was a daily smoker 12 months prior and who has smoked every day for:
Long-term	At least 5 years.
Short-term	At least 1 but no more than 5 years.
Transitional	Noninitiator who did not smoke daily 12 months prior.
Toward more intensive smoking	Smoked some days or not at all 12 months prior.
Unclassified	Noninitiator who cannot be otherwise classified.