Mismatch Negativity and P50 Sensory Gating in Abstinent Former Cannabis Users

Table 1

Cannabis use measures including abstinence, retrospective measures of dependence and psychological symptoms during intoxication, and withdrawal symptoms.

	Ex-cannabis users
Prior cannabis use
Frequency (days/month)	30 [15.0–30.0]
Quantity (cones/month)	517.5 [52.5–3150.0]
Age of onset (years)	17 [12.0–20.5]
Duration of regular use (years)	13.5 [4.3–30.3]
Duration of daily use (months)	155.3 [0.0–363.7]
Time since last smoked (years)	1.5 [0.1–16.0]
Abstinence since regular use (years)	3.5 [0.1–16.0]
SDS	8.50 [1.0–13.0]
CEQ
Euphoria	40 [32.0–52.0]
Paranoia	48 [28.0–87.0]
After effects	27 [15.0–51.0]
Amotivation	18.5 [10.0–31.0]
Psychotic	8 [4.0–20.0]
MWC	10.5 [0.0–37.0]

Notes. Data are reported as median [range].
Cones used in waterpipe: 3 cones are equivalent to one standard sized joint [48].
Severity of Dependence Scores (SDS) (retrospective)
Cannabis Experiences Questionnaire (CEQ) (retrospective)
Marijuana Withdrawal Checklist (MWC) (retrospective).