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. 2015 Oct 1;25(8):611–617. doi: 10.1089/cap.2015.0075

FIG. 3.

FIG. 3.

Meta-regression: Psychostimulant dose versus risk of anxiety. Meta-regression demonstrated a significant negative association between dosage of psychostimulants (x axis) and the risk of anxiety (y axis: β = −0.0039 [95% CI: −0.00718, −0.00064], z = −2.34, p = 0.019). Higher doses of psychostimulants were associated with a decreased risk of anxiety relative to placebo. Daily doses of psychostimulants are expressed in methylphenidate equivalents.