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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: Genes Brain Behav. 2013 Sep 30;12(8):780–791. doi: 10.1111/gbb.12081

Figure 2. Nine neurochemical levels were significantly associated with MA-induced BSn (q<0.05).

Figure 2

Q-Q plots compare observed −log(10) p-values to expected –log(10) p-values under the null distribution for bivariate associations of BSn measures (a Total distance, b Stereotypy number, c Margin time) to 301 neurochemical levels. Each point represents a neurochemical-BSn association p-value and points falling above the null expectation, represented by the dark gray line, are higher than expected by chance. Light gray lines indicate 95% confidence intervals for each p-value rank. All metabolome-wide significant p-values are labeled.