Table 1.

Participant characteristics

n*MeanSDMinMax
CPD7007.22.41.010.0
Expired CO (ppm)69913.78.70.069.0
Plasma nicotine (ng/mL)69912.18.80.546.4
Plasma COT (ng/mL)699243.7152.85.0937.8
Plasma 3HC (ng/mL)60274.563.71.2720.0
Age (y)69845.010.719.181.3
BMI69730.58.014.073.5
n* (%)
Gender
    Males233 (33.3)
    Females467 (66.7)
Mentholated cigarettes
    Yes569 (81.3)
    No131 (18.7)
Depth of inhalation (self-reported)
    Deep into chest163 (23.4)
    Partly into chest220 (31.5)
    To back of throat143 (20.5)
    To back of mouth129 (18.5)
    Puff only43 (6.2)
  • *Number of participants with data available for each variable.