The correlation study showed that there was no correlation between the content of GAP43 protein in the serum of patients with schizophrenia and the PANSS total score, nor positive symptom score, nor negative symptom score, and nor general pathological symptom score, indicating that although the serum GAP43 protein was increased in schizophrenia patients at the onset, its increase degree was not correlated with the severity of positive symptoms, negative symptoms, and general pathological symptoms of schizophrenia. This evidence concerns the gene GAP43 and schizophrenia.