. Author manuscript; available in PMC: 2013 May 2.

Published in final edited form as: Psychopharmacology (Berl). 2011 Sep 16;220(2):309–318. doi: 10.1007/s00213-011-2480-4

Table 1.

Cannabis smoking topography measures

	Admission 1		Admission 2
	Day 1	Day 2	Day 1	Day 2
Total cigarettes^*	11 (1.3)	13 (1.3)	11 (1.2)	12 (1.0)
Puffs per cigarette	13 (1.0)	13 (1.0)	13 (0.9)	14 (1.0)
Total volume (ml)^*	7,136 (1,326)	9,048 (1,372)	6,390 (907)	8,789 (994)
Total volume per cigarette (ml)^*	648 (59)	719 (58)	628 (70)	814 (100)
Average volume per puff (ml)^*	51 (4.3)	58 (4.9)	52 (6.2)	61 (7.3)
Average puff duration (s)	1.3 (0.1)	1.3 (0.1)	1.3 (0.1)	1.3 (0.1)
Maximum puff duration (s)	3.4 (0.3)	3.2 (0.3)	3.0 (0.3)	3.5 (0.4)
Puff velocity (ml/s)^*	41 (2.8)	46 (2.9)	40 (2.5)	47 (3.6)
Time to peak velocity (s)	0.5 (0.1)	0.5 (0.1)	0.5 (0.1)	0.5 (0.1)

p<0.05, main effect of day