CYP19A1 and astrocytoma (excluding glioblastoma): Our results showed that rs2255192 in the CYP19A1 gene significantly increased the risk of astrocytoma among the low-grade subgroup under the recessive model (OR = 3.05, 95% CI = 1.11–8.34, p = 0.034) and the additive model (OR = 1.53, 95% CI = 1.04–2.24, p = 0.03).