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ERIC Number: EJ930853
Record Type: Journal
Publication Date: 2011-Aug
Pages: 9
Abstractor: As Provided
Reference Count: N/A
ISBN: N/A
ISSN: ISSN-0140-1971
Adolescent Substance Use, Sleep, and Academic Achievement: Evidence of Harm Due to Caffeine
James, Jack E.; Kristjansson, Alfgeir Logi; Sigfusdottir, Inga Dora
Journal of Adolescence, v34 n4 p665-673 Aug 2011
Using academic achievement as the key outcome variable, 7377 Icelandic adolescents were surveyed for cigarette smoking, alcohol use, daytime sleepiness, caffeine use, and potential confounders. Structural equation modeling (SEM) was used to examine direct and indirect effects of measured and latent variables in two models: the first with caffeine excluded and the second with caffeine included. A substantial proportion of variance in academic achievement, which might otherwise have been attributed to the harmful effects of cigarette smoking and alcohol use, was found to be attributable to caffeine. Evidence was obtained that daytime sleepiness, which was found to be independently associated with usage of licit substances (nicotine and alcohol) and caffeine, may be an important mediator of the negative impact of those substances on academic achievement. Findings suggest the importance of including measurements of caffeine consumption in future studies of adolescent substance use. (Contains 2 figures and 4 tables.)
Elsevier. 6277 Sea Harbor Drive, Orlando, FL 32887-4800. Tel: 877-839-7126; Tel: 407-345-4020; Fax: 407-363-1354; e-mail: usjcs@elsevier.com; Web site: http://www.elsevier.com
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Iceland