. Author manuscript; available in PMC: 2020 Aug 1.

Published in final edited form as: Exp Clin Psychopharmacol. 2019 May 23;27(4):301–308. doi: 10.1037/pha0000279

Table 2.

Cannabis use variables

Variable	Mean (SD)
Age at initiation of cannabis use	20 (13)
Age at initiation of regular cannabis use	27 (16)
Hours per day under the influence of cannabis	4 (2)

Variable	*n (%)*
Amounts of cannabis used per week
≤ 1/16^th ounce	5 (20%)
1/8^th ounce	1 (4%)
1/4^th ounce	4 (16%)
3/8^th ounce	1 (4%)
½ ounce	4 (16%)
≥1 ounce	10 (40%)
Typical Mode of Cannabis Administration^*
Joint	17 (68%)
Pipe	15 (60%)
Bong	12 (48%)
One-Hitter	9 (36%)
Edible	20 (80%)
Blunt	8 (32%)
Spliff	1 (4%)
Vaporizer	14 (56%)

Note:

Modes reported are not mutually exclusive