title: Impact of marijuana use on self-rated cognition in young adult men and women.
abstract: OBJECTIVE
  Marijuana (MJ) is a widely used substance that has been shown to impair cognition in laboratory settings. There is a growing number of medical MJ dispensaries and state policies permitting the use of MJ in the United States. This study is a naturalistic study that explores the association of same day MJ use on self-rated cognition in young adult men and women.
  
  
  METHODS
  Forty-eight (n = 48) young adults (22 F; mean age = 22.3) participated. After a baseline assessment, participants made daily phone calls to study staff over the next 3 weeks. Cumulative minutes of MJ use in the last 24-hours were assessed. Demographic information collected and self-ratings of cognitive impairment were assessed using six questions about areas of difficulty thinking each day.
  
  
  RESULTS
  There was a significant relationship between greater number of minutes of MJ use and higher levels of self-rated cognitive difficulties (b = .004; SE = .001; p < .006). There was no main effect of gender (b = 1.0; SE = .81; p < .22). Planned evaluation of the interaction between gender and minutes of MJ use was not significant statistically, suggesting a similar relationship between minutes of MJ use and cognitive difficulties among women compared to men (p < .54).
  
  
  CONCLUSIONS
  There is an association between current and heavy MJ use and self-perceived cognitive ability in both males and females. These findings reveal important information regarding one consequence of MJ use that has real-world meaning to young adult smokers. (Am J Addict 2015;24:160-165).
authors: University of Michigan Addiction Research Center, Ann Arbor, Michigan.
authors: Deirdre A
authors: DA
authors: Conroy
authors: General Medicine Research Unit, Butler Hospital, Providence, Rhode Island.
authors: Megan E
authors: ME
authors: Kurth
authors: University of Michigan Addiction Research Center, Ann Arbor, Michigan.
authors: Kirk J
authors: KJ
authors: Brower
authors: Department of Family and Preventive Medicine, University of California, San Diego, La Jolla, California.
authors: David R
authors: DR
authors: Strong
authors: General Medicine Research Unit, Butler Hospital, Providence, Rhode Island.|Warren Alpert School of Medicine of Brown University, Providence, Rhode Island.
authors: Michael D
authors: MD
authors: Stein
mesh_terms: D000293:Adolescent; D000328:Adult; D003072:Cognition Disorders / Q000139:chemically induced* / Q000175:diagnosis / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D008385:Marijuana Smoking / Q000523:psychology*; D057566:Self Report; D012737:Sex Factors; D014481:United States; D055815:Young Adult