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. Author manuscript; available in PMC: 2009 Sep 17.
Published in final edited form as: Neuropsychopharmacology. 2008 Feb 27;33(12):2791–2800. doi: 10.1038/npp.2008.17

Figure 3.

Figure 3

Change in self-reported anxiety (VAS) after different doses of caffeine. Data represent mean ± SEM peak change from pre-capsule baseline in participants from all population groups. Asterisks denote significant difference from placebo (post hoc pairwise comparisons; **P<0.01).