Figure 1 | Scientific Reports

Figure 1

From: Low plasma serotonin linked to higher nigral iron in Parkinson’s disease

Figure 1

Group differences in (a) plasma serotonin (5-HT) concentrations and (b) nigral iron content (reflected by QSM values) between PD patients and controls. P-values indicate results of independent samples t-tests (two-tailed). White box and error bars indicate mean and 95% CI. Box and whisker plots reflect median and interquartile range. Dashed horizontal line marks lowest tertile of serotonin concentrations in PD group. Figure was produced using the ggplot2 package80 in R (version 3.5.3)81.

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