Effect of weight loss on proteinuria in adults with type 2 diabetes: A real-world study

Aims: To assess the impact of weight loss on proteinuria in patients with type 2 diabetes (T2DM) in real-world settings. Methods: A total of 1054 participants were categorized based on weight change from baseline to one-year followup: weight gain (>= 3%), stable weight, or weight loss (>= 3%). Proteinuria outcomes were defined as urinary albumin/creatinine ratio (UACR) progression (>= 30 % increase), UACR regression (>= 30 % reduction), or UACR stable. Ordered logistic regression analysis evaluated the relationship between weight loss and UACR regression. Results: Of the 1054 participants, 44.5 % were overweight, and 24.1 % were obese. Patients with obesity were at higher risk of developing proteinuria (OR, 1.783; 95 %CI, 1.195 to 2.659). Weight loss was associated with an 83.3 % increase in UACR regression compared to weight gain (OR, 1.833; 95 % CI, 1.262 to 2.663; P = 0.001). This association remained consistent across most subgroups and stronger in males (P for interaction = 0.023), with a 6 % UACR regression for every 1 kg weight loss (OR, 1.06; 95 % CI, 1.02 to 1.10; P = 0.003). Conclusions: Our real-world study reveals that weight reduction is associated with UACR regression in patients with T2DM, regardless of the approach used for weight management, and the association was much stronger in males.