Table 1 Baseline characteristics among the participants abstinent for at least 14 days and those abstinent for less than 14 days.

Socio-demographics

Gender (% of male)

52.1

46.4

.17

Age (years)^b

41.5 (12.1)

40.4 (11.7)

.24

Race (%)

.27

White

81.4

80.6

African American

11.6

13.9

Other

7.0

5.5

Marital Status (%)

.24

   Single

39.7

46.4

   Married

33.5

26.0

   Divorced/separated/widowed

26.8

27.6

Education (%)

.11

   Less than 12 years

3.7

6.0

   12–15 years

50.4

56.3

   16 or more years

45.9

37.7

Smoking characteristics

Cigarettes per day

21.7 (10.0)

24.7 (11.7)

.0008

FTND (range 1–10)

5.1 (2.2)

5.8 (2.3)

.0001

POMS ^c

Feeling anxious

1.4 (1.1)

1.5 (1.2)

.36

Feeling sad

0.6 (0.8)

0.9 (1.0)

.002

Feeling confused

0.4 (0.8)

0.6 (0.9)

.07

Feeling angry

0.8 (1.0)

0.9 (1.1)

.48

Feeling energetic

2.0 (1.0)

1.8 (1.0)

0.08

Feeling fatigue

1.3 (1.1)

1.6 (1.2)

0.003

Depression score (range 0–60)

11.3 (9.0)

13.7 (10.2)

0.003