A nurse is assessing a client with a history of polycystic kidney disease. Which finding is most indicative of disease progression?

Choice A reason: Hypertension (150/90 mmHg) is a key indicator of polycystic kidney disease progression, as cysts compress renal vasculature, activating the renin-angiotensin-aldosterone system. This increases blood pressure, accelerating renal damage and cardiovascular complications, making it a critical finding that reflects advancing disease and requires aggressive management. Choice B reason: Clear urine output is not indicative of polycystic kidney disease progression, as urine appearance varies. Advanced disease often reduces output or causes hematuria due to cyst rupture, but clear urine does not specifically signal worsening kidney function, making it less relevant than hypertension. Choice C reason: A serum creatinine of 1.0 mg/dL is within normal range (0.6–1.2 mg/dL), suggesting stable kidney function. In polycystic kidney disease progression, creatinine rises due to reduced glomerular filtration, so this normal value does not indicate worsening disease compared to hypertension’s clear association. Choice D reason: Normal kidney size is not expected in polycystic kidney disease, as cysts enlarge the kidneys. Progression typically shows increased kidney size on ultrasound, so normal size suggests early or stable disease, making this an incorrect indicator of disease advancement compared to hypertension.