DDAH2 and retinal disorder: Although association of rs3131383 in DDAH2 with ADMA level was not statistically significantly associated in the smaller blinding retinopathy group, the direction of the association with ADMA was the same as that for no retinopathy controls and the full dataset (p = 0.143, B: −0.03 95% CI: −0.07–0.01).