Renee M Cloutier1, Brian H Calhoun2, Stephanie T Lanza3, Ashley N Linden-Carmichael4. 1. The Edna Bennett Pierce Prevention Research Center, College of Health and Human Development, The Pennsylvania State University, 314 Biobehavioral Health, University Park, PA 16802, USA. Electronic address: renee.cloutier@pitt.edu. 2. The University of Washington, Department of Psychiatry and Behavioral Sciences, 1100 NE 45th Street, Suite 300, Box 354944, Seattle, WA 98105, USA. Electronic address: bhc120@uw.edu. 3. The Edna Bennett Pierce Prevention Research Center, College of Health and Human Development, The Pennsylvania State University, 314 Biobehavioral Health, University Park, PA 16802, USA. Electronic address: slanza@psu.edu. 4. The Edna Bennett Pierce Prevention Research Center, College of Health and Human Development, The Pennsylvania State University, 314 Biobehavioral Health, University Park, PA 16802, USA. Electronic address: axc547@psu.edu.
Abstract
INTRODUCTION: Subjective ratings of cannabis effects are important predictors of use-related consequences. However, psychometric research is fairly limited, particularly for measures to capture variability in daily life when diverse modes of cannabis administration and co-substance use are common. METHODS: This study evaluated the predictive utility of a revised item to assess perceived cannabis effects and examined modes of cannabis administration and alcohol and nicotine co-use as moderators. Participants were 106 young adults (18-25 years; 51% female) who completed up to 14 consecutive daily reports of substance use (n = 1405 person-days). Two measures of subjective effects were examined: a standard item (0-100 rating of "how high do you feel?") and a revised item that uses four crowd-sourced anchor points ranging from relaxed (0), calm/chill (33), high (67), and stoned/baked (100). The items shared substantial variance (Pseudo-R2 = 59.5%), however, the revised item showed greater within-person variability (77.0% vs. 68.8%) and stronger day-level associations with consumption levels (Pseudo-R2 = 25.0% vs. 16.7%). RESULTS: The cannabis consumption-subjective effects link was weaker on blunt-only days compared to vape-only days. Subjective cannabis effects were higher on nicotine co-use days after controlling for cannabis consumption; neither alcohol nor nicotine co-use moderated the cannabis consumption-subjective effects link. DISCUSSION: The revised subjective cannabis effects item is a viable alternative to the standard item among young adults who engage in simultaneous alcohol and cannabis use. CONCLUSIONS: Future research focused on characterizing the variability in cannabis effects is needed.
INTRODUCTION: Subjective ratings of cannabis effects are important predictors of use-related consequences. However, psychometric research is fairly limited, particularly for measures to capture variability in daily life when diverse modes of cannabis administration and co-substance use are common. METHODS: This study evaluated the predictive utility of a revised item to assess perceived cannabis effects and examined modes of cannabis administration and alcohol and nicotine co-use as moderators. Participants were 106 young adults (18-25 years; 51% female) who completed up to 14 consecutive daily reports of substance use (n = 1405 person-days). Two measures of subjective effects were examined: a standard item (0-100 rating of "how high do you feel?") and a revised item that uses four crowd-sourced anchor points ranging from relaxed (0), calm/chill (33), high (67), and stoned/baked (100). The items shared substantial variance (Pseudo-R2 = 59.5%), however, the revised item showed greater within-person variability (77.0% vs. 68.8%) and stronger day-level associations with consumption levels (Pseudo-R2 = 25.0% vs. 16.7%). RESULTS: The cannabis consumption-subjective effects link was weaker on blunt-only days compared to vape-only days. Subjective cannabis effects were higher on nicotine co-use days after controlling for cannabis consumption; neither alcohol nor nicotine co-use moderated the cannabis consumption-subjective effects link. DISCUSSION: The revised subjective cannabis effects item is a viable alternative to the standard item among young adults who engage in simultaneous alcohol and cannabis use. CONCLUSIONS: Future research focused on characterizing the variability in cannabis effects is needed.
Authors: Megan E Patrick; Anne M Fairlie; Jennifer M Cadigan; Devon A Abdallah; Mary E Larimer; Christine M Lee Journal: J Stud Alcohol Drugs Date: 2019-07 Impact factor: 2.582
Authors: Tory R Spindle; Edward J Cone; Nicolas J Schlienz; John M Mitchell; George E Bigelow; Ronald Flegel; Eugene Hayes; Ryan Vandrey Journal: JAMA Netw Open Date: 2018-11-02