IL18 and nasopharyngeal carcinoma: Subgroup analysis by ethnicity showed that IL-18 137G>C was significantly associated with the risk of NPC in Asian populations (Allele model: OR=1.65, 95% CI = 1.38-1.96, p<0.00001, I2 = 0%, Figure 7A, Dominant model: OR=1.73, 95% CI = 1.41-2.12, p<0.00001, I2 = 0%, Figure 7B, Recessive model: OR=2.01, 95% CI = 1.28-3.17, p=0.003, I2 = 0%, Figure 7C, Heterozygote model OR=1.64, 95% CI = 1.32-2.04, p<0.00001, I2 = 0%, Figure 7D, Homozygote model OR=2.39, 95% CI = 1.51-3.78, p=0.0002, I2 = 0%, Figure 7E).