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. Author manuscript; available in PMC: 2015 Nov 6.
Published in final edited form as: Exp Clin Psychopharmacol. 2013 Jan 28;21(2):124–132. doi: 10.1037/a0031610

Table 1.

Baseline Demographic and Tobacco-Related Variables for Participants in the Enhanced Quit & Win Study

Variable Total
N 651
Age (mean ± SD) 26.1 ± 8.0
Sex (n, % female) 376 (57.8%)
Ethnicity (n, % white) 561 (86.2%)
2- or 4-year school (n, %)
 2-year school 191 (29.3%)
 4-year school 460 (70.7%)
Year in school
 Non-degree seeking 13 (2.0%)
 Year 1 130 (20.0%)
 Year 2 146 (22.4%)
 Year 3 161 (24.7%)
 Year 4+ 134 (20.6%)
 Graduate/professional degree program 67 (10.3%)
Working status (n, % full time) 100 (15.4%)
Days smoked last 30 days (mean ± SD) 28.5 ± 3.8
CPD on smoking day (mean ± SD) 11.7 ± 8.4
 ≥10 cigarettes per day 374 (57.5%)
 < 10 cigarettes per day 277 (42.5%)
How soon after waking smoke first cigarette (n, %)
 0–5 minutes 73 (11.2%)
 6–15 minutes 109 (16.7%)
 16–30 minutes 142 (21.8%)
 31–60 minutes 158 (24.3%)
 61+ minutes 169 (26.0%)
CPT empirical demand indices (mean ± SD, median [range])
 Intensity 15.0 ± 9.4, 15.0 [1–80]
 Breakpoint 4.0 ± 3.0, 3.0 [0.05–11]
Omax 12.3 ± 29.1, 5.0 [0.01–440]

Note. SD: standard deviation; CPD: cigarettes per day on smoking days.