Table 3.

Total NNAL, 1-HOP, and total cotinine in the urine of smokers of regular, light, and ultralight cigarettes, per mg creatinine per CPD

nMean (95% CI)
Total NNAL (pmol/mg creatinine/CPD)1-HOP (pmol/mg creatinine/CPD)Total cotinine (pmol/mg creatinine/CPD)
Study 1
    Regular230.093 (0.077-0.109)0.085 (0.064-0.105)1.28 (0.975-1.58)
    Light580.106 (0.096-0.117)0.061 (0.050-0.072)1.11 (0.974-1.24)
    Ultralight340.106 (0.083-0.130)0.069 (0.054-0.085)1.18 (0.942-1.42)
Study 2
    Regular240.100 (0.082-0.118)0.053 (0.037-0.069)0.877 (0.736-1.02)
    Light220.109 (0.086-0.133)0.068 (0.044-0.092)1.20 (0.934-1.47)
    Ultralight140.093 (0.046-0.139)0.050 (0.029-0.071)0.858 (0.484-1.23)
Pooled
    Regular470.097 (0.085-0.109)0.068 (0.055-0.082)1.07 (0.900-1.24)
    Light800.099 (0.089-0.110)0.063 (0.053-0.073)1.13 (1.01-1.25)
    Ultralight480.102 (0.081-0.123)0.064 (0.051-0.077)1.09 (0.883-1.29)