Post hoc comparisons using Tamhane’s test indicated that the mean NEGR1 protein expression score of schizophrenia patients with the paranoid subtype diagnosis (m = 1.72, sd = 0.43) was statistically higher than the mean score of controls (m = 1.24, sd = 0.24, p < 0.05). This evidence concerns the gene NEGR1 and schizophrenia.