Table 2.

Demographic, cigarette consumption, and nicotine dependence of participants enrolled in study 4, which investigated the variation of plasma NMR in ad libitum smokers over 44 weeks

VariableDescriptive statistics
N43
Sex
 Female, n (%)14 (32.6)
 Male, n (%)29 (67.4)
Race
 Asian, n (%)4 (9.3)
 Black, n (%)4 (9.3)
 Mixed, n (%)5 (11.6)
 White, n (%)30 (69.8)
Age
 Mean (SD)37.6 (12.1)
 Range20–61
BMI, kg/m2
 Mean (SD)25.6 (5.7)
 Range16.5–47.3
CPD
 Mean (SD)19.2 (7.7)
 Range10–40
  ≤10, n (%)3 (7.0)
  11–20, n (%)28 (65.1)
  21–30, n (%)9 (20.9)
  >31, n (%)3 (7.0)
TFC
 Mean (SD)17.0 (16.9)
 Range1–60
FTND
 Mean (SD)5.6 (2.0)
 Range1–10
NDSS overall score
 Mean (SD)−0.08 (0.97)
 Range−1.93–1.89