This study is open to adults with chronic kidney disease. People with and without type 2 diabetes can take part in this study. The purpose of this study is to find out whether a medicine called BI 690517 improves kidney function in people with chronic kidney disease when taken alone or in combination with a medicine called empagliflozin. In the first part of the study, participants take empagliflozin or placebo as tablets every day for 2 months. Placebo tablets look like empagliflozin tablets but do not contain any medicine. In the second part, participants are divided into several groups. Depending on the group, the participants then additionally take different doses of BI 690517 or placebo as tablets for 3.5 months. In this case, placebo tablets look like BI 690517 tablets but do not contain any medicine. Participants are in the study for about 6 months. During this time, they visit the study site about 12 times. Where possible, about 4 of the 12 visits can be done at the participant's home instead of the study site. The trial staff may also contact the participants by phone or video call. Participants collect urine samples at home. These samples are then analysed to assess kidney function. At the end of the trial the results are compared between the different groups. The doctors also regularly check participants' health and take note of any unwanted effects.
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Change From Treatment Period Baseline in Log Transformed Urine Albumin Creatinine Ratio (UACR) Measured in First Morning Void (FMV) Urine After 14 Weeks - All Patients
Timeframe: The MMRM model is a longitudinal analysis and it incorporated UACR measurements from baseline (Week 6,7 or 8 of the Run-in period) and Week 6, Week 10 and Week 12-14 of Treatment period.
Percent Change of FMV UACR From Baseline to Week 14 Based on Adjusted Median (95% CI) Back Transformed From MMRM Estimate - All Patients
Timeframe: The MMRM model is a longitudinal analysis and it incorporated UACR measurements from baseline (Week 6,7 or 8 of the Run-in period) and Week 6, Week 10 and Week 12-14 of Treatment period.
Change From Baseline to Week 14 in the Log Transformed FMV UACR - Patients With Background Therapy of Placebo Matching Empagliflozin
Timeframe: The MMRM model is a longitudinal analysis and it incorporated UACR measurements from baseline (Week 6,7 or 8 of the Run-in period) and Week 6, Week 10 and Week 12-14 of Treatment period.
Percent Change of FMV UACR From Baseline to Week 14 Based on Adjusted Median (95% CI) Back Transformed From MMRM Estimate - Patients With Background Therapy of Placebo Matching Empagliflozin
Timeframe: The MMRM model is a longitudinal analysis and it incorporated UACR measurements from baseline (Week 6,7 or 8 of the Run-in period) and Week 6, Week 10 and Week 12-14 of Treatment period.
Change From Baseline to Week 14 in the Log Transformed FMV UACR - Patients With Background Therapy of Empagliflozin
Timeframe: The MMRM model is a longitudinal analysis and it incorporated UACR measurements from baseline (Week 6,7 or 8 of the Run-in period) and Week 6, Week 10 and Week 12-14 of Treatment period.
Percent Change of FMV UACR From Baseline to Week 14 Based on Adjusted Median (95% CI) of MMRM Estimate - Patients With Background Therapy of Empagliflozin
Timeframe: The MMRM model is a longitudinal analysis and it incorporated UACR measurements from baseline (Week 6,7 or 8 of the Run-in period) and Week 6, Week 10 and Week 12-14 of Treatment period.