Table 1

Selected demographic and tobacco use characteristics among study participants

confirmed participation (n = 52)

failed to confirm participation (n = 17)

characteristic

category

n

%

n

%

p-value:


gender

female

26

50.0%

11

64.7%

p = 0.403

male

26

50.0%

6

35.3%

age group

25-44 yrs

13

25.0%

7

41.2%

p = 0.435

45-54 yrs

22

42.3%

6

35.3%

55-68 yrs

17

32.7%

4

23.5%

race

white

51

98.1%

12

70.6%

p = 0.003

non-white

1

1.9%

5

29.4%

# daily cigarettes

<20 cigs

6

11.5%

2

11.8%

p = 0.622

20-29 cigs

20

42.3%

9

52.9%

30+ cigs

24

46.2%

6

35.3%

years smoked

<20 yrs

7

13.5%

3

17.6%

p = 0.909

20-29 yrs

25

48.1%

8

47.1%

30+ yrs

20

38.5%

6

35.3%

pack-years smoked

<30

14

26.9%

7

41.2%

p = 0.536

30-44

18

34.6%

5

29.4%

45-88

20

38.5%

5

29.4%

time to 1st cigarette

<30 min

37

71.2%

14

82.4%

p = 0.528

30+ min

15

28.8%

3

17.6%


Intention to treat (ITT) group includes all 69 participants while the according to protocol (ATP) group includes the 52 participants who confirmed participation.

Geimer et al. BMC Public Health 2010 10:155   doi:10.1186/1471-2458-10-155

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