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. Author manuscript; available in PMC: 2016 Feb 8.
Published in final edited form as: Am J Med Genet B Neuropsychiatr Genet. 2013 Oct;0(7):762–769. doi: 10.1002/ajmg.b.32154

Fig. 1.

Fig. 1

Moving-average smoothed graph of the number of combat-related PTSD symptoms among 172 participants who reported combat trauma by level of combat exposure. The mean number of PTSD symptoms is graphed for each apoE group (i.e., 1 or 2 vs. 0 €4 alleles; “€4+” vs. “€4−”). In addition to graphing the observed (“Obs”) mean, we also include a graph of the mean predicted (“Pred”) by the GEE-interaction model.