ST6GAL1 and astrocytoma (excluding glioblastoma): Table 2 showed that rs2239611 of ST6GAL1 gene significantly decreased the risk of astrocytoma in the codominant model (OR = 0.87, 95% CI = 0.41–1.83, p = 0.044) and the dominant model (OR = 0.74, 95% CI = 0.55–1.00, p = 0.049) after adjusted by age and gender.