Table 1.

Characteristics of subjects with complete genotype and Rasch-modeled nicotine withdrawal score data

n (%)
Gender
    Male204 (48.7)
    Female215 (51.3)
Smoker status
    Experimenter*9 (2.2)
    Current216 (51.6)
    Former194 (46.3)
  • *Experimenter smoker: smoking ≥100 cigarettes in a lifetime and not ever smoking on a daily basis.

  • Current smoker: ever smoking a cigarette even a puff and smoking ≥100 cigarettes in a lifetime and currently smoking ≥1 cigarettes on most days or currently smoking ≥1 cigarettes on most days and not having quit smoking cigarettes completely.

  • Former smoker: ever smoking a cigarette even a puff and ever smoking on a daily basis and quitting smoking cigarettes completely.