College students who consume medium-to-high levels of alcohol and marijuana have a consistently lower GPA, according to a study published March 8, 2017 in the open-access journal PLOS ONE by Shashwath Meda from Hartford Hospital/Institute of Living, USA, and colleagues.
Alcohol and marijuana are the two most abused substances in US colleges, but little is known about the effect of consuming both on students’ academic performance. The authors of the present study examined the association between college students’ alcohol and marijuana consumption and their grade point average (GPA) in each semester. They used data from the Brain and Alcohol Research in College Students study, which tracked 1,142 students for two years after they began college, and using self-reported data they clustered them into groups of low users or medium-to-high users of alcohol or both substances.
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