Natalia Laspada1, Erin Delker1, Estela Blanco1, Pamela Encina2, Gabriela Caballero2, Jorge Delva3, Raquel Burrows2, Betsy Lozoff4, Sheila Gahagan1. 1. Department of Pediatrics, Division of Child Development and Community Health, University of California, La Jolla, CA, USA. 2. Institute of Nutrition and Food Technology, Unversidad de Chile, Santiago, Chile. 3. School of Social Work, Boston University, Boston, MA, USA. 4. Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, USA.
Abstract
BACKGROUND: There is concern about the cognitive consequences of marijuana consumption. AIM: To assess the influence of current and past marijuana use and frequency on verbal learning and memory in a sample of adults aged 21 years old. MATERIAL AND METHODS: Marijuana use was assessed using a clinician administered interview in 654 participants (56% females), who reported frequency of use, age of first use and whether its use led to problems in their lives. The CogState International Shopping List was administered to assess learning and memory. RESULTS: Seventy percent reported ever using marijuana, 46% consuming during the past year and 27% during the past 30 days. The latter scored significantly lower on delayed recall. Current and frequent use were significantly associated with lower accuracy in verbal learning and memory. CONCLUSIONS: In this cohort of adults aged 21 years old, marijuana use was prevalent and related to worse verbal memory.
BACKGROUND: There is concern about the cognitive consequences of marijuana consumption. AIM: To assess the influence of current and past marijuana use and frequency on verbal learning and memory in a sample of adults aged 21 years old. MATERIAL AND METHODS:Marijuana use was assessed using a clinician administered interview in 654 participants (56% females), who reported frequency of use, age of first use and whether its use led to problems in their lives. The CogState International Shopping List was administered to assess learning and memory. RESULTS: Seventy percent reported ever using marijuana, 46% consuming during the past year and 27% during the past 30 days. The latter scored significantly lower on delayed recall. Current and frequent use were significantly associated with lower accuracy in verbal learning and memory. CONCLUSIONS: In this cohort of adults aged 21 years old, marijuana use was prevalent and related to worse verbal memory.
Authors: Megan E Patrick; John E Schulenberg; Patrick M O'Malley; Lloyd D Johnston; Jerald G Bachman Journal: J Stud Alcohol Drugs Date: 2011-01 Impact factor: 2.582
Authors: Krista Lisdahl Medina; Karen L Hanson; Alecia D Schweinsburg; Mairav Cohen-Zion; Bonnie J Nagel; Susan F Tapert Journal: J Int Neuropsychol Soc Date: 2007-09 Impact factor: 2.892
Authors: Paul Maruff; Elizabeth Thomas; Lucette Cysique; Bruce Brew; Alex Collie; Peter Snyder; Robert H Pietrzak Journal: Arch Clin Neuropsychol Date: 2009-03-25 Impact factor: 2.813
Authors: Karen L Hanson; Jennifer L Winward; Alecia D Schweinsburg; Krista Lisdahl Medina; Sandra A Brown; Susan F Tapert Journal: Addict Behav Date: 2010-06-13 Impact factor: 3.913