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. Author manuscript; available in PMC: 2016 Jan 31.
Published in final edited form as: Addict Behav. 2014 Sep 28;41:20–28. doi: 10.1016/j.addbeh.2014.09.021

Figure 2.

Figure 2

Craving and withdrawal trajectories for the 4 classes of opioid users. Number of participants decreased over time due to opioid use as follows: baseline and week 1 (N=653), week 2 (n=388), week 3 (n=258), and week 4 (n=122).