Table 1.

Waterpipe smoking topography measures by preparation (n=30^*)

	Non-preferred control flavour		Preferred flavour		df	t	p
	Mean	SD	Mean	SD	df	t	p
Total smoke time, min	46.09	2.01	45.74	1.35	29	0.899	0.376
Cumulative puffing time, min	6.82	3.79	8.06	7.80	29	−1.10	0.281
Average puff duration, s	3.43	1.54	3.16	1.48	29	1.39	0.176
Average flow rate, L/min	13.7	4.4	12.3	3.9	29	2.01	0.054
Average IPI, s	24.73	13.75	21.54	12.57	29	1.70	0.099
Total number of puffs	133	76	159	121	29	−1.76	0.090
Total inhaled volume, L	90.4	51.2	80.7	43.6	29	1.14	0.263
Average puff volume, L	0.79	0.43	0.65	0.39	29	2.50	0.018
Maximum puff volume, L	1.70	0.54	1.82	1.37	29	−0.51	0.614

^*6 participants were missing topography data for one or both WP sessions.

df, degrees of freedom; IPI, interpuff interval.