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Longitudinal influence of alcohol and marijuana use on academic performance in college students

Fig 4

Bar plot of GPA (estimated marginal means) across cluster (group) transitioners from our pseudo trajectory analysis.

Post-hoc between-group analysis (using a Sidak correction for multiple comparisons) is also indicated. The Improver group represents students that went from a worse substance use cluster to a better one over the period of the study. Decliners were the opposite of improvers. Stable group participants started and ended the study in the same substance use cluster. Note: Error bars represent standard error of mean.

Fig 4