UCHL1 and post-traumatic stress disorder: Analysis by PTSD duration revealed a clear trend: the highest values were seen in the recent PTSD group (≤5 years; median 30.54 ng/mL), while in the individuals with chronic PTSD (>5 years),UCHL1 levels decreased to a median of 11.18 ng/mL, and the control group had the lowest levels (median: 3.98 ng/mL).