Market scope note: This article draws on sources from both Korea and the United States. Each piece of information is labeled 🇰🇷 Korea or 🇺🇸 U.S. in the text to indicate which country's standards apply.
Has your parent mentioned foamy urine? Or persistent swelling in the legs? Many people dismiss these signs as simply "getting older." Yet these quiet signals may be early indicators of chronic kidney disease (만성콩팥병, also called 만성신장병, or CKD). Because kidneys often show no noticeable symptoms even after losing more than 30% of their function, damage can be progressing long before anyone notices.
🇰🇷 Korea According to the Korean Society of Nephrology's "Chronic Kidney Disease–Dialysis Specialist Fact Sheet 2026," published in 2026, the prevalence of chronic kidney disease among Korean adults aged 19 and older was 6.3% as of 2024. Narrowing the focus to adults aged 70 and older, that figure jumps to 25.9% — meaning roughly 1 in 4 parents in their 70s or beyond is living with chronic kidney disease. 🇰🇷 Korea Health Insurance Review and Assessment Service (건강보험심사평가원) data show that the number of chronic kidney disease patients in Korea grew from approximately 170,000 in 2015 to more than 346,000 in 2024, more than doubling in ten years. The aging population and the spread of chronic conditions such as high blood pressure and diabetes are cited as the primary drivers.
🇺🇸 U.S. According to the U.S. CDC and the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), chronic kidney disease affects approximately 34% of Americans aged 65 and older — meaning roughly 1 in 3 older adults in the United States has this condition. 🇺🇸 U.S. A particularly serious concern is awareness: 9 out of 10 people with chronic kidney disease do not know they have it, because the disease progresses slowly and quietly.
Why is it especially dangerous for older adults? The kidneys' blood-filtering capacity — measured by the glomerular filtration rate — naturally declines by 6–8% every decade simply due to aging. When high blood pressure or diabetes is added to the picture, the rate of damage accelerates considerably. As kidney function falls sufficiently, regulating blood pressure and electrolytes becomes difficult, anemia develops, and cascading damage occurs in the bones and blood vessels. This is why chronic kidney disease is called a systemic disease, not merely a "kidney problem."
As a family caregiver, key signs to watch for in daily life include increasingly foamy urine or blood in the urine, swelling in the lower legs, frequent urination or a sudden change in urine volume, and unexplained fatigue. If any of these appear, encourage your parent to see a doctor without delay. 🇰🇷 Korea During regular health checkups, be sure to request kidney function tests, urinalysis, and blood tests — these are the most effective tools for early detection.
Diet management is equally important. 🇰🇷 Korea According to nutritional guidelines from Soonchunhyang University Hospital (순천향대학교 부속병원) and Yonsei University Severance Hospital (연세대 세브란스병원), patients with chronic kidney disease are advised to limit sodium intake to no more than 2,000 mg per day (approximately 5 g of salt). Yet the average daily salt intake for Koreans is 13.5 g — about 2.7 times the recommended amount — making careful attention especially important. The key is moderating high-sodium staples of Korean cuisine such as kimchi, doenjang (fermented soybean paste), soy sauce, and ramyeon. Regarding protein, recommendations vary by stage of disease, but from stage 3 onward it is generally advisable to discuss and adjust intake with a medical professional. The goal is not simply to cut intake across the board, but to find a balance suited to each individual's situation.
🇺🇸 U.S. Medicare covers dialysis treatment and kidney transplant-related costs comprehensively for patients who have progressed to end-stage renal disease (ESRD), regardless of age. Medicare Part B covers outpatient dialysis treatment as well as home dialysis equipment and supplies; after the deductible is met, patients are generally responsible for 20% of the cost. Patients with ESRD can enroll in Medicare even if they are below the usual age threshold, and starting in 2021, Medicare Advantage (Part C) plans also became an option. 🇺🇸 U.S. As of 2021, annual medical costs for Medicare beneficiaries aged 66 and older with chronic kidney disease were approximately $28,000 per person — more than twice the cost for same-age beneficiaries without kidney disease. This figure illustrates just how significant early detection and management are from a financial standpoint as well.
Sources: Korean Society of Nephrology (대한신장학회), "Chronic Kidney Disease–Dialysis Specialist Fact Sheet 2026" (June 2026); Health Insurance Review and Assessment Service (건강보험심사평가원) health and medical big data (as reported by Kyunghyang Shinmun, June 2026); nutritional guidelines from Soonchunhyang University Affiliated Hospital (순천향대학교 부속병원) and Yonsei University Severance Hospital (연세대 세브란스병원); National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), Kidney Disease Statistics (updated 2025); U.S. CDC, Chronic Kidney Disease Fact Sheet (March 2026); Medicare.gov, "Coverage of Kidney Dialysis & Kidney Transplant Services" (November 2025); KFF (Kaiser Family Foundation), Medicare ESRD guidance (2025).
Note: This article was compiled by AI from the sources cited above. We strive for accuracy, but for decisions about your specific situation, please confirm the latest guidance from a professional or the relevant agency.