DUSP22 methylation was also higher in postmortem prefrontal cortex (PFC) tissue of schizophrenia patients (N = 91; mean methylation = 0.40, sd = 0.10) compared to unaffected controls (N = 123; mean methylation = 0.37, sd = 0.13) (B = 0.35, p = 0.007). Here, DUSP22 is linked to schizophrenia.