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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Drug Alcohol Depend. 2011 Jun 8;119(1-2):130–133. doi: 10.1016/j.drugalcdep.2011.05.014

Table 1.

Participant characteristics

Characteristics n = 50
Demographics
 Age (years) 25.1 (.7)
 Education (years) 12.1 (.3)
 % Caucasian 92
 % Married 16
 % Private insurance 30
 % First pregnancy 56
 Weeks pregnant at intake 10.5 (.6)
Smoking Characteristics
 Cigarettes/day pre-pregnancy 20.3 (1.2)
 Cigarettes/day in past 7 days 9.2 (1.0)
 Age started smoking (years) 15.9 (.5)
 Intake CO (ppm) 10.6 (.9)
 Intake urinary cotinine (ng/ml) 988.7 (86.8)
 % Living with other smoker(s) 82

Values represent mean (standard error) unless specified otherwise.