Synapse markers in the CSF from healthy controls (n = 21) and FEP patients (n = 44). The three panels depict the levels of the two soluble forms of SNAP-25tot (A), SNAP‐25aa40 (B) and SYT-1 (C). Each point represents the concentration of a single CSF sample and the horizontal lines represent the mean value for each group. Statistical differences between controls and FEP patients were determined using Unpaired t-test, P = 0.104 (A), P = 0.065 (B), P = 0.137 (C), respectively.