Table 1

Selected characteristics of smokers and smoking behaviours according to cigarette nicotine yield

Nicotine yield (mg/cigarette)
VariablesUltra low yield (0–0.1) n=19Low yield (0.1–<0.6) n=88Medium yield (0.6–<1.0) n=102High yield (≥1.0) n=37χ2
χ2 tests of the relation between smoking behaviours and cigarette nicotine yield were conducted.
Age, mean (SD)44.7 (7.5)39.1 (8.6)39.3 (10.0)40.0 (9.8)39.7 (9.4) (all)
Number of years smoked, mean (SD)24.4 (9.0)20.0 (8.0)19.6 (9.4)20.7 (9.2)20.3 (8.9) (all)
Inhalation pattern
    Light 15.85.77.92.7
    Medium63.235.233.727.0p=0.031
    Deep21.059.158.470.3
Time to first morning cigarette (%)
    ≤5 mins15.826.133.748.6
    5 mins to ≤30 mins47.443.243.635.2p=0.053
    30 mins to < 60 mins21.017.15.913.5
    ≥60 mins15.813.616.82.7
Stage of change
    Precontemplation78.995.593.194.6
    Contemplation15.83.45.95.4p=0.260
    Preparation5.31.110
Quit attempts in the past (%)
    Yes78.954.643.629.7p=0.002
    No21.145.456.470.3