Table 2.

Correlations between smoking topography and cannabis-related outcome measures

	Total cigarettes	Total volume (ml)	Total volume per cigarette (ml)	Average volume per puff (ml)	Average puff duration (s)	Maximum puff duration (s)	Puff velocity (ml/s)	Time to peak velocity (s)
Cannabis use history
Age of first cannabis use	–	–	–	–	–	–	–	0.55*
Years of frequent cannabis use	–	–	0.58**	0.61**	0.49*	–	0.46*	–
Times per day cannabis used	–	0.43*	–	–	–	0.47*	–	–
Craving during abstinence
MCQ—compulsivity	0.57**	0.64**	–	–	–	–	–	–
MCQ—purposefulness	–	0.49*	–	–	–	–	–	–
Withdrawal during abstinence
Withdrawal (WDS)	0.44*	–	–	–	–	–	–	–
Peak withdrawal (WDS)	0.50*	–	–	–	–	–	–	–
Sleep during abstinence
Sleep efficiency (PSG)	–	–	−0.58**	−0.49*	–	–	–	–
Sleep latency (PSG)	–	0.53*	–	–	–	–	–	–
Wake after sleep onset (PSQI)	–	–	0.58**	–	–	0.50*	–	–
Sleep latency (PSQI)	–	–	–	–	0.48*	–	–	–
Sleep quality (PSQI)	–	–	–	–	–	−0.59**	–	–
Morning mood (PSQI)	–	–	–	–	–	−0.50*	–	–
Cognitive during ad libitum
DSST
Trials attempted	–	–	−0.46*	−0.50*	–	–	–	–
% correct	0.46*	–	–	−0.57**	–	–	–	0.54*
TOL
Reaction time	–	–	–	0.44*	–	–	–	–

^*p<0.05;

^**p<0.01