ALB and diabetic kidney disease: Compared with the lowest quartile of FT3, the highest quartile reduced the risk of developing urinary albumin (OR = 0.499,95% CI:0.289 to 0.856), moderate to severe impairment of glomerular filtration rate (OR = 0.106,95% CI:0.032 to 0.354), positive renal tubular marker β2-MG (OR = 0.516, 95% CI:0.299 to 0.883) and the risk of DKD occurrence (OR = 0.450,95% CI:0.260 to 0.774) (Table 4).