TABLE 4—

Subgroup Characteristics

	Percentage of Smokers	Percentage of SD Smokers	Percentage of ED Smokers	Mean Age	Mean No. Days Smoked of Past 30	Mean No. Cigarettes per Smoking Day	Mean No. Cigarettes Per Montha	Intend to Quit Within 6 Months? (% Yes)	Ever Smoked Daily? (% Yes)	Start Smoking Before Age 20? (% Yes)b	Mean Age of Initiationb
SD Smokers
Overall	19.2	100.0	. . .	38.1	14.5	6.1	102.0	65.1	52.0	66.6	18.8
Initiator	2.8	14.4	. . .	21.4	15.5	5.4	90.6	70.8	31.8	70.5	19.1
Stable Pattern	8.6	44.6	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .
Long-Term	6.6	34.4	. . .	40.8	13.3	5.3	76.2	56.2	24.8	62.2	19.2
Short-Term	2.0	10.2	. . .	42.5	14.7	6.7	99.2	67.6	100.0	66.6	18.6
Transitional	6.1	31.8	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .
To Less Intensive Smoking	3.0	15.6	. . .	41.0	18.2	9.8	184.6	80.2	89.8	73.6	17.9
To More Intensive Smoking	1.7	9.0	. . .	40.5	11.7	6.3	83.8	74.2	59.4	66.5	18.6
Direction Unclear	1.4	7.2	. . .	42.5	17.1	7.9	141.4	69.8	100.0	65.9	18.6
Unclassified	1.7	9.2	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .
ED Smokers
Overall	80.8	. . .	100.0	40.9	30.0	18.9	566.4	41.6	. . .	78.1	17.4
Initiator	6.8	. . .	8.4	20.9	30.0	13.3	398.8	45.7	. . .	79.5	18.3
Stable-Pattern	67.4	. . .	83.4	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .
Long-Term	65.2	. . .	80.7	42.9	30.0	20.0	600.0	40.0	. . .	78.7	17.2
Short-Term	2.2	. . .	2.7	36.0	30.0	16.6	498.3	39.6	. . .	75.8	17.6
Transitional	4.9	. . .	6.0	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .
To Less Intensive Smoking	4.9	. . .	6.0	41.2	30.0	13.3	399.9	61.6	. . .	70.8	18.2
Unclassified	1.7		2.2	. . .	. . .	. . .	. . .	. . .		. . .	. . .

Note. SD = some-day; ED = every-day.

^aProduct of number of days and number of cigarettes per smoking day.

^bSmoking on a fairly regular basis.