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. Author manuscript; available in PMC: 2012 Oct 16.
Published in final edited form as: Am J Addict. 2010 Mar-Apr;19(2):169–177. doi: 10.1111/j.1521-0391.2009.00025.x

Figure 1.

Figure 1

Cocaine use as a function of time over a 12 week period. Left panel: HLM Point Estimate to show lack of any change over time in cocaine positive urines in participants with PTSD (open squares) versus those without PTSD (closed squares). Right panel: HLM Point Estimate to show direction of change in cocaine positive urines in participants with PTSD receiving contingency (open circles), those with PTSD and no contingency (open squares), those without PTSD receiving contingency (closed triangles) and those without PTSD and no contingency (closed squares).