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. Author manuscript; available in PMC: 2008 May 11.
Published in final edited form as: Drug Alcohol Depend. 2006 Nov 28;88(2-3):251–258. doi: 10.1016/j.drugalcdep.2006.11.006

Table 2.

Bivariate Relations between Family History, Demographics, and Smoking Variables

Variable
Mean ± (SE)
FH−

(n=74)
FH+

(n=86)
Male

(n=72)
Female

(n=88)
African-
American
(n=77)
Caucasian

(n=41)
Hispanic

(n=42)
Overall

(n=160
)
Cigarettes per
day
16.6a
(0.9)
22.1a
(1.1)
19.3
(0.9)
19.7
(1.2)
19.6
(1.0)
18.6
(1.3)
20.3
(1.9)
19.5
(0.8)
Years of
Smoking
16.9b
(1.2)
20.6b
(1.1)
18.1
(1.2)
19.5
(1.1)
19.9
(1.2)
18.9
(1.8)
16.9
(1.3)
18.8
(0.8)
Age at
initiation
17.0
(0.4)
16.0
(0.7)
17.1
(0.6)
16.0
(0.4)
16.3
(0.5)
16.9
(0.6)
16.4
(0.7)
16.5
(0.3)
FTND Score 5.0c
(0.2)
6.2c
(0.2)
5.3d
(0.2)
6.0d
(0.2)
6.0e
(0.2)
4.7e,f
(0.3)
5.9 f
(0.4)
5.6
(0.2)
MNWQ Score 17.3
(0.7)
18.5
(0.7)
17.3
(0.7)
18.5
(0.7)
17.8
(0.7)
18.3
(1.0)
17.9
(1.0)
18.0
(0.5)
Breath CO
(Start of Study)
11.6
(0.9)
12.3
(0.9)
13.9g
(1.0)
10.9g
(0.7)
11.8
(0.9)
12.6
(1.1)
11.7
(1.2)
12.0
(0.6)

a-g Values with matching superscripts differ at p < 0.05