IL4 and glioblastoma: We further analyzed whether the seven tSNPs have a different effect on GBM risk in gender specific population, and found that the allele “G” of rs2243248 in the IL-4 gene showed a decrease risk in female (OR = 0.35, 95% CI,0.13 - 0.94, p = 0.0032), but the allele “T” showed a decrease risk in male (OR = 0.30, 95% CI, 0.17 - 0.53, p = 0.0032) (Table 5).