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. Author manuscript; available in PMC: 2020 May 1.
Published in final edited form as: Addiction. 2019 Feb 1;114(5):907–916. doi: 10.1111/add.14547

Figure 2.

Figure 2.

Latent Classes of Past 12-month Poly-substance Use among U.S. Youth (15–17 years), Wave 1 (2013–2014) of the Population Assessment of Tobacco and Health (PATH) Study.

* Excludes snus pouches.

** Includes past 12-month use of cigars as blunts.

*** Refers to prescription drugs that were not prescribed for the participant or taken only for the experience or feeling they caused.

**** Includes past 12-month use of cocaine or crack, stimulants (i.e. methamphetamine or speed), heroin, inhalants, solvents, or hallucinogens.

Latent class analyses were conducted in MPlus, version 7.4 with weight, strata, and cluster variables to accommodate the complex sampling design.