Table 2.

Puff topography results and correlation with CO boost

		Correlation with CO boost
Puff topography parameter	M ± SD	r	p
Total session time (s)	1,985 ± 783	.367	.005
Total puff time (s)	506 ± 272	.595	.000
Number of puffs	169 ± 100	.445	.001
Mean puff duration (s)	3.21 ± 1.16	.19	.161
Mean puff volume (L)	0.511 ± 0.333	.315	.018
Mean interpuff interval (s)	12.56 ± 5.85	−.255	.058
Mean flow rate (unit)	9.19 ± 4.12	.377	.004
Maximum flow rate (unit)	24.51 ± 32.82	.235	.081
Total smoke inhaled per  session (L)	79.1 ± 54.5	.638	.000

Note. CO, carbon monoxide.