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. Author manuscript; available in PMC: 2015 Mar 2.
Published in final edited form as: J Subst Abuse Treat. 2008 Mar 14;35(4):362–368. doi: 10.1016/j.jsat.2008.01.002

Table 1.

Sociodemographics, Substance Use History, Quit Attempt Characteristics

Cannabis Group Tobacco Group Significance Level
N 67 54 -
Age 31.9 (11.2)* 45.7 (15.3) < .01
Female 41% 60% < .04
Ethnicity < .01***
    Caucasian 66% 89% --
    African-American 30% 6% --
Global Symptom Index (from the BSI) 28 (19, 53) 21.5 (6, 34) < .01
    Daily Use of Alcohol
        Lifetime 37% 37% --
        Current 3% 2% --
    Years of cannabis / tobacco use 12 (8, 27)** 31.5 (15, 43) < .01
    Frequency of Use 4.5 (2.8) times / day 16.8 (8.6) cigarettes / day ---
# of past quit attempts 3 (2, 6) 5 (4, 10) < .01
Longest prior period of abstinence (days) 60 (10, 248) 75 (16, 365) ns
    % quitting another substance at same time 24% 13% ns
# of days from quit date to interview 18.4 ± 8.6 19.0 ± 8.4 ns
    # of days abstinent following quit attempt 9.7 ± 8.4 8.0 ± 7.1 ns
    Reduced use before quitting (% yes) 41% 51% ns
    Lapse**** (% yes) 60% 83% < .01
        Relapse**** 30% 36% ns
*

Mean (SD)

**

Median (quartiles) analyzed because of non-normal distribution

***

Reflects Chi-square test result comparing Caucasian vs. All Others including African-American

****

Lapse indicates any use of cannabis or tobacco since the initiation of the quit attempt. Relapse indicates return to daily use

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