IL10 and Behcet disease: By using the random-effects model, meta-analysis revealed a significant association between BD and the IL-10 -819C/T polymorphism under the allelic (OR = 0.691, 95% CI: 0.626–0.762, P < 0.001), homozygous (OR = 0.466, 95% CI: 0.368–0.589, P < 0.001), dominant (OR = 0.692, 95% CI: 0.584–0.820, P < 0.001), and recessive (OR = 0.557, 95% CI: 0.405–0.767, P < 0.001) models, while no significant association was found under the heterozygous model (P = 0.384) (Table 2 and Fig. 2).