Table 1.

Participant-level cannabis use and sleep data for baseline and follow-up assessments.

Variable		P1: Experimental		P2: Placebo control		P3: Placebo control		P4: Experimental
Time of assessment		Baseline	Follow-up	Baseline	Follow-up	Baseline	Follow-up	Baseline	Follow-up
Cannabis usea		0.40	0.00	0.71	N/A	0.18	0.57	4.51	1.50
Sleep b
	Quality	1	1	3	N/A	3	3	1	1
	Latency	30 min	10 min	30 min	N/A	120 min	120 min	30 min	15 min
	Duration	5 hours	6 hours	2 hours	N/A	2.5 hours	3.5 hours	8 hours	8 hours
	Efficiency	58%	80%	28%	N/A	29%	41%	80%	100%
	Disturbances	2	2	3	N/A	3	2	1	0
	Med use	0	1	2	N/A	1	0	0	0
Daytime dysfunction		0	2	3	N/A	1	0	1	1
Total PSQIc		9	9	19	N/A	17	14	5	2

^aMean cannabis use was based on both frequency of use (ie, number of days) and quantity of use per day (scores range from 0-8). Quantity of cannabis used on each day was indexed by a graphical depiction of joints of varying sizes that ranged from 0-8 [36].

^bSleep quality, sleep latency, sleep duration, sleep efficiency, sleep disturbances, daytime dysfunction, and sleep med use represent the 7 components of the PSQI [31]. Sleep quality, sleep disturbances, and daytime dysfunction range from 0 “best” to 3 “worst.” In terms of sleep medication use, 0=no use in the past month, 1=less than once a week, 2=once or twice a week, and 3=three or more times a week.

^cPSQI total scores can range from 0 (excellent sleep) to 21 (very poor sleep).