IL9 and age-related macular degeneration: The analysis showed that IL-9 rs1859430 GA genotype was associated with 30% decreased odds of early AMD (OR = 0.700; CI: 0.507-0.966; p = 0.030) under the codominant model, and about 33% decreased under the overdominant model after adjustment for gender (OR = 0.673; CI: 0.490-0.925; p = 0.015).