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Latent class factor loadings by substance use. Class 1 is the “marijuana-amphetamines class” (MJ/AMP) and accounts for 21.6% of polydrug users. Class 2 is the “benzo-antidepressant class” (BZ/ANT) and accounts for 39.0% of polydrug users. Class 3 is the “opioid-benzo class” (OPD/BZ) and accounts for 32.7% of polydrug users. Finally, Class 4 is the “marijuana-cocaine class” (MJ/CN) and accounts for 6.7% of the study sample.
