Table 2 Percentage (95 % CI) of males and females who responded to FTND categories

Item 1

 Time for first cigarette after wake up :>60 min (0) ^a

39.6 (35.3;43.9)

33.7 (28.8;38.6)

38.7 (33.8;43.6)

χ2 = 5.40 P = 0.15

 Time for first cigarette after wake up :31–60 min (1) ^a

18.1 (14.6;21.6)

14.6 (10.9;18.3)

17.5 (13.4;21.6)

 Time for first cigarette after wake up :6–60 min (2) ^a

18.7 (15.4;22.0)

29.2 (24.6;33.8)

20.3 (16.2;24.4)

 Time for first cigarette after wake up : ≤ 5 min (3) ^a

23.7 (19.9;27.4)

22.5 (18;27)

23.5 (18.9;28.0)

Item 2

 Difficult to refrain from smoking in places where it is forbidden (1) ^b

48.2 (43.7;52.7)

40.4 (35;45.8)

47 (41.9;52.1)

χ2 = 1.8 P = 0.18

Item 3

 Cigarette would you hate most to give up first in the morning (1) ^b

50.6 (46.1;55.1)

55.1 (49.9;60.3)

51.3 (46.2;56.4)

χ2 = 0.59 P = 0.44

Item 4

 Cigarette per day: 1–10 (0) ^a

61.6 (57.3;65.9)

59.6 (54.6;64.6)

61.3 (56.4;66.2)

χ2 = 0.55 P = 0.98

 Cigarette per day: 11–20 (1) ^a

28.1 (24.2;32.2)

31.5 (26.6;36.4)

28.6 (24.1;33.1)

 Cigarette per day: 21–30 (2) ^a

5.8 (3.6;7.9)

5.6 (3.2;8)

5.8 (3.5;8.2)

 Cigarette per day: 31–30 (3) ^a

4.4 (2.6;6.2)

3.4 (1.5;5.3)

4.3 (2.7;5.9)

Item 5

 Smoke more frequently during the first hours of waking (1) ^b

54 (49.7;58.3)

44.9 (39.6;50.2)

52.6 (47.9;57.3)

χ2 = 2.59 P = 0.11

Item 6

 Smoke if you are so ill that you are in bed (1) ^b

41.4 (37.1;45.7)

40.4 (35;45.8)

41.2 (36.7;45.7)

χ2 = 0.19 P = 0.91