Laboratory Values Indicating Renal Function

A 62-year-old male patient with a history of chronic kidney disease (CKD) is scheduled for routine laboratory tests to monitor his renal function. Recently, he has experienced an increase in fatigue, decreased appetite, and swelling in his lower extremities. As the nurse, you are reviewing the patient’s laboratory values. Which of the following laboratory results would most likely indicate worsening renal function in this patient?