Table 2.

Correlation of the second MG boost to smoking-related variables

All smokersMentholNonmenthol
raParPrP
Average puff volume (mL)0.360.00030.486.22E−050.090.64
CO boost0.310.0010.220.060.470.006
Average puff duration (sec)0.300.0030.330.0080.100.58
Total smoke exposure (mL)0.260.010.350.0040.140.46
Nicotine boost0.260.040.320.050.280.19
Average interpuff interval (sec)−0.140.17−0.370.0020.270.14
Number of puffs0.110.270.170.180.070.69
Cotinine (ng/mL)0.050.610.180.12−0.150.40
Maximum puff velocity (mL/sec)0.050.620.180.140.160.38
FTND0.040.650.220.060.020.90
3HC (ng/mL)0.040.690.230.06−0.110.54
NMR0.010.900.130.270.040.84
  • NOTE: Data significant at P < 0.05.

  • ar and P were computed on the basis of Spearman rank correlation coefficient.