Table 2 Smoking-related characteristics of the newly-diagnosed PTB patients recruited from Tehran, Iran during 2012–2013

Smoking initiation age

21.77 ± 7.43

22.26 ± 9.47

22.67 ± 9.90

0.94

 Daily

55 (90.2 %)

59 (95.2 %)

55 (91.7 %)

0.56

 Occasional

6 (9.8 %)

3 (4.8 %)

5 (8.3 %)

 Relaxation

7 (11.7 %)

6 (9.8 %)

2 (3.3 %)

0.47

 Enjoyment

0 (0 %)

2 (3.3 %)

2 (3.3 %)

 Addiction

25 (41.7 %)

29 (47.5 %)

30 (50.0 %)

 Habitual

28 (46.7 %)

24 (39.3 %)

26 (43.0 %)

Number of daily cigarettes

15.30 ± 10.45

15.66 ± 10.98

17.02 ± 10.87

0.62

PY^a

20.02 ± 17.39

20.04 ± 20.58

22.11 ± 21.19

0.89

Fg^b

6.43 ± 2.88

5.76 ± 2.47

6.71 ± 2.54

0.6

 Yes

15 (24.6 %)

14 (22.6 %)

16 (26.7 %)

0.38

 No

46 (75.4 %)

48 (77.4 %)

44 (73.3 %)

 Yes

39 (63.9 %)

35 (56.5 %)

34 (56.7 %)

0.63

 No

22 (36.1 %)

27 (43.5 %)

26 (43.3 %)

 Yes

40 (65.6 %)

42 (67.7 %)

34 (56.7 %)

0.41

 No

21 (34.4 %)

20 (32.3 %)

26 (43.3 %)

Intention to quit in next month

26 (42.6 %)

29 (46.8 %)

27 (45.0 %)

0.89

35 (57.4 %)

33 (53.2 %)

33 (55 %)

Quit motivation

6.31 ± 2.38

6.18 ± 2.71

6.58 ± 2.34

0.67

Quit insurance

5.57 ± 2.36

5.10 ± 2.47

5.51 ± 2.31

0.43

Pre intervention Pico

7.49 ± 2.23

7.17 ± 2.30

7.66 ± 2.19

0.53