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. Author manuscript; available in PMC: 2012 Jan 15.
Published in final edited form as: Drug Alcohol Depend. 2010 Sep 15;113(2-3):207–214. doi: 10.1016/j.drugalcdep.2010.08.004

Table 1.

Descriptive Data regarding Demographic Variables, Smoking Variables, and the Cigarette Purchase Task (CPT) Demand Metrics (N =138).

Measure Mean/% SD Median Range
Demographic Variables
Gender
Male 51%
Female 49%
Ethnicity
Black 3.6%
Latino 9.4%
White 84.1%
Other 2.9%
Age 16.50 14.08 17 14–19
Socio Economic Status
lowest 19.1%
middle 7.3%
highest 73.5%
Smoking Variables
Motivation to Change 5.39 1.88 5 1–10
Cigarettes per Day 5.97 5.99 3.89 0–38.07
Nicotine Dependence 3.85 1.88 4 0–9
CPT Demand Metrics
Intensity 21.54 15.85 20 1–83
Omax 16.9 46.94 6.5 0–282
Elasticity .023 .023 .013 .0001–.11
Breakpoint 8.87 22.54 3 0–142
Pmax 10.95 47.15 1.5 0–282

Note: Omax = maximum output (expenditure); Pmax = Price maximum

Socio economic status was coded as: highest income (private school students and students who attended public school with full pay lunch), middle income (students who attended public school and qualified for a reduced-price school lunch), and lowest income (students who attended public school and qualified for a free school lunch).