Figure 4.
Hard drug use trajectories for Cohorts 1–3
Note: Time 0 = Wave 1, Time 1 = Wave 2, Time 2 = Wave 3, Time 3 = Midpoint, Time 4 = Wave 4, Time 5 = Wave 5, Time 6 = Wave 6
C1 = Cohort 1, C2 = Cohort 2, C3 = Cohort 3
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