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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: Eval Program Plann. 2011 Dec 13;35(3):321–328. doi: 10.1016/j.evalprogplan.2011.12.001

Figure 2.

Figure 2

Association of the Program Exposure Index (PEI) with the Probabilities of Smoking Behavior Progression among US Youth, the Probabilistic Discrete Event System Method and the National Survey on Drug Use and Health (NSDUH) Data, 2000–08, United States

Note: Any two transitional probabilities with their 95% CI not overlapping with each other were statistically significantly different at p<0.05 level.