CHRNA9 and central nervous system cancer: The results of univariate Cox regression analysis showed that the high expression of CHRNA9 (P < 0.001), WHO grade (P < 0.001), IDH status (P < 0.001), Age (P < 0.001), Primary therapy outcome (P < 0.001), and 1p/19q codeletion (P < 0.001) were all associated with poor prognosis of glioma.