Stage 3 CKD: What to Ask at Your Next Review

Stage 3 chronic kidney disease means your estimated glomerular filtration rate (eGFR) is between 30 and 59 mL/min. In practical terms, your kidneys are working at roughly one-third to one-half of their normal capacity.

This is the stage where most people first learn they have CKD. Your kidneys may have been declining silently for years before a routine blood test flagged the drop. That can feel alarming — but stage 3 is also the stage where intervention has the most impact.

At this level of function, your kidneys can still handle most daily tasks. You are unlikely to need dialysis any time soon. But your body is starting to show subtle changes: waste products build up slightly, blood pressure may be harder to control, and electrolyte balance requires more attention.

The single most important thing about stage 3 is this: the trend matters more than the number. An eGFR of 45 that has been stable for three years is very different from an eGFR of 45 that was 60 six months ago. Always ask about your trend.

Stage 3 is divided into two sub-stages, and the distinction is clinically significant:

• Stage 3a (eGFR 45–59): Mild-to-moderately decreased function. Many 3a patients remain stable for years with lifestyle changes and medication. Monitoring is typically every 6–12 months.
• Stage 3b (eGFR 30–44): Moderate-to-severely decreased function. Risk of progression to stage 4 and 5 increases meaningfully. Monitoring is usually every 3–6 months. Your care team may discuss future planning including dialysis access.

The split matters because research shows that 3b patients have approximately double the risk of reaching kidney failure compared to 3a patients. If you are in 3b, your nephrologist will likely be more proactive about medication adjustments and monitoring frequency.

Ask your doctor: "Am I 3a or 3b, and what does that mean for how often I should be monitored?"

Many stage 3 patients feel completely normal — that is both the good news and the challenge. Without symptoms, it is easy to underestimate the importance of management.

However, some people at stage 3 begin to notice:

• Fatigue: Feeling more tired than usual, especially in the afternoon. This can be related to mild anaemia or the buildup of waste products.
• Nocturia: Waking up to urinate at night more frequently. Damaged kidneys lose the ability to concentrate urine, producing more dilute urine around the clock.
• Mild swelling: Slight puffiness in the ankles or around the eyes, particularly in the morning. This suggests your kidneys are struggling with fluid and sodium balance.
• Foamy urine: Persistent foam or bubbles in the toilet may indicate protein leaking into the urine (proteinuria).
• Higher blood pressure: Blood pressure that used to be well-controlled may start creeping up or requiring additional medication.

None of these are guaranteed — and none are exclusive to kidney disease. But if you notice a pattern, mention it at your next review.

A 15-minute nephrology appointment goes fast. Having your questions ready ensures you leave with the information you actually need. Here are the most important ones for stage 3:

1. "What is my eGFR trend over the last 2–3 years?" — A stable trend is reassuring. A declining trend changes the urgency of management.
2. "What is my uACR, and is it improving?" — Protein in the urine (albuminuria) is an independent risk factor for progression. Reducing it is a treatment target.
3. "Am I on the right medications to protect my kidneys?" — ACE inhibitors, ARBs, and SGLT2 inhibitors are evidence-based kidney protectors. If you are not on at least one, ask why.
4. "What is my blood pressure target?" — For most CKD patients, the target is below 130/80 mmHg. Tighter control slows progression significantly.
5. "Do I need to adjust my diet?" — At stage 3, not everyone needs strict dietary changes. Ask specifically about sodium, potassium, phosphorus, and protein based on your blood results.
6. "Should I see a renal dietitian?" — A dietitian who specialises in kidney disease can create a personalised plan far more effectively than general advice.
7. "What medications should I avoid?" — NSAIDs (ibuprofen, naproxen), certain contrast dyes, and some supplements can harm kidneys. Get a clear list.
8. "When is my next appointment, and what tests will be done?" — Knowing the plan reduces anxiety and ensures nothing falls through the cracks.
9. "At what point would we discuss dialysis or transplant?" — This does not mean it is imminent. Understanding the roadmap helps with long-term planning.
10. "Is there anything else I can do to slow progression?" — Opens the door for your doctor to mention exercise, smoking cessation, weight management, or new treatment options.

Your care team will monitor several markers. Understanding what they measure helps you engage with your results:

• eGFR (from creatinine): Your headline kidney function number. Tracked over time to assess the trend.
• uACR (urine albumin-to-creatinine ratio): Measures protein leakage. A key predictor of progression. The goal is to reduce it, not just monitor it.
• Blood pressure: Measured at every visit. Home monitoring between visits gives a more accurate picture than office readings alone.
• Potassium: Can start to rise in stage 3b. Important if you are on ACE inhibitors, ARBs, or potassium-sparing medications.
• Phosphorus and calcium: May begin to shift in late stage 3. Early changes guide whether phosphate binders or vitamin D supplements are needed.
• Haemoglobin: Drops as kidneys produce less erythropoietin. Anaemia is common by stage 3b and treatable.
• Bicarbonate: Low levels indicate metabolic acidosis, which accelerates kidney decline. Easily treated with sodium bicarbonate supplements.
• PTH (parathyroid hormone): Rises when kidneys cannot activate vitamin D properly. Monitored to prevent bone disease.

Medication is essential — but lifestyle changes amplify its effect. The evidence supports these interventions at stage 3:

• Blood pressure management: The single most impactful modifiable factor. Aim for below 130/80 mmHg. Home monitoring helps track your true average.
• Sodium reduction: Aim for under 2,000 mg per day. This alone can reduce blood pressure by 5–10 mmHg and decrease proteinuria. Read labels — most sodium comes from processed and restaurant food, not the salt shaker.
• Regular exercise: 150 minutes per week of moderate activity (walking, cycling, swimming) improves blood pressure, blood sugar, and overall cardiovascular health. Start slowly if you are not currently active.
• Blood sugar control (if diabetic): Keeping HbA1c below 7% significantly slows diabetic kidney disease. SGLT2 inhibitors offer dual benefit for blood sugar and kidney protection.
• Smoking cessation: Smoking accelerates kidney decline independently of other risk factors. Quitting at any stage provides measurable benefit.
• Maintain a healthy weight: Excess weight increases kidney workload. Even modest weight loss (5–10%) can improve blood pressure, blood sugar, and proteinuria.
• Avoid NSAIDs: Over-the-counter painkillers like ibuprofen and naproxen can damage kidneys. Use paracetamol (acetaminophen) for pain relief instead, and always check with your pharmacist before taking new medications.

Do not panic if:

• Your eGFR fluctuates by a few points between tests — this is normal biological variation.
• You were told you have stage 3 CKD and feel perfectly fine — most stage 3 patients are asymptomatic.
• Your eGFR has been stable at 45–55 for years — stability is the goal, and many people stay at this level for decades.

Do speak to your doctor promptly if:

• Your eGFR drops by more than 5 points in a year — this suggests faster-than-expected decline.
• Your uACR is rising despite treatment — may indicate the need for medication adjustment.
• You develop significant new swelling, persistent fatigue, or breathlessness — could indicate fluid overload or worsening anaemia.
• You notice blood in your urine — always warrants investigation.
• You are prescribed a new medication and are unsure if it is kidney-safe — always check.

Stage 3 CKD is a signal to act — not a sentence. With the right questions, the right medications, and consistent lifestyle choices, many people live full, active lives at this stage for years. The fact that you are reading this article and preparing for your next appointment already puts you ahead.