Aims: To evaluate the effects of separate and combined use of the sodium-glucose cotransporter-2 (SGLT2) inhibitor dapagliflozin and the glucagon-like peptide-1 receptor agonist (GLP-1RA) exenatide on measures of kidney function.Methods: In this prespecified secondary analysis of the DECREASE trial, we enrolled 66 obese patients with type 2 diabetes in a 16-week randomized double-blind placebo-controlled clinical trial to investigate the effects of dapagliflozin and exenatide twice daily, alone or in combination, versus placebo on 24-hour urinary albumin:creatinine ratio (UACR), creatinine and cystatin Cestimated glomerular filtration rate (GFR) and kidney injury molecule-1:creatinine ratio (KIM-1:Cr).Results: At week 16, the mean UACR change from baseline was À39.6% (95% confidence interval [CI] À58.6, À11.9; P = 0.001) in the combined exenatidedapagliflozin group, À18.1% (95% CI À43.1, 18.0; P = 0.278) in the dapagliflozin group, À15.6% (95% CI À41.4, 21.6; P = 0.357) in the exenatide group and À 11.0% (95% CI À39.8, 31.5; P = 0.552) in the placebo group. Compared to placebo, UACR difference at week 16 in the exenatide-dapagliflozin group was À32.2% (95% CI À60.7, 16.9; P = 0.159). Effects were similar in 37 participants who were using angiotensin-converting enzyme inhibitors or angiotensin receptor blockers at baseline. Compared to placebo, in the exenatide-dapagliflozin group, an acute dip in estimated GFR was observed with creatinine-estimated GFR