TABLE 1.

CURRENT FAGERSTRÖM TEST FOR NICOTINE DEPENDENCE (FTND) ITEM DISTRIBUTION BY BIRTH COHORT

	<1945	1945–1975	>1975
	N=806	N=7794	N=1265
Mean FTND (s.d.) ^a,^b,^c	4.7 (2.2)	5.1 (2.2)	4.2 (2.1)
Time to first cigarette (FTND1) ^a,^b
60+ minutes	16.0	9.0	11.8
31–60 minutes	15.9	14.6	16.3
5–30 minutes	41.0	37.6	32.6
<5 minutes	27.1	38.8	39.3
Difficult to refrain (FTND2) ^a,^b
No	80.6	62.6	65.3
Yes	19.4	37.4	34.7
Cigarette most hate to give up (FTND3) ^c
Any other	36.8	35.1	39.4
First one of the morning	63.2	64.9	60.6
Cigarettes smoked per day (FTND4) ^a,^b,^c
<=10	12.9	22.1	56.0
11–20	52.6	49.8	35.5
21–30	18.4	17.8	7.3
30+	16.1	10.3	1.2
Smoke more in the morning (FTND5) ^a,^c
No	57.6	51.7	59.6
Yes	42.4	48.3	40.4
Smoke while sick (FTND6) ^a,^b,^c
No	75.2	55.0	61.6
Yes	24.8	45.0	38.4

Difference between first birth cohort and second birth cohort are significant at p<0.05

Difference between first birth cohort and third birth cohort are significant at p<0.05

Difference between second birth cohort and third birth cohort are significant at p<0.05