TGFB1 and diabetic kidney disease: The mean value of 24-hour urine protein was 5763.10 ± 2801.43 mg in group A and 133.60 ± 21.01 mg in group B. There was no significant correlation between urinary TGF-β1 levels and 24-hour urine protein level (p = 0.334, r = 0.341, Pearson correlation) in diabetic nephropathy patients.