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. Author manuscript; available in PMC: 2008 Sep 6.
Published in final edited form as: Drug Alcohol Depend. 2007 Mar 26;90(1):12–24. doi: 10.1016/j.drugalcdep.2007.02.006

Figure 2.

Figure 2

Estimated patterns of marijuana involvement among sixth to eighth grade students based on a longitudinal latent class analysis. Solid line=Class 1, dotted line=Class 2, dashed line=Class 3.