A silent epidemic is on the rise, and it's time we shed light on this critical health issue. Chronic kidney disease is a growing concern, impacting millions worldwide and often going unnoticed until it's too late.
According to a recent study published in The Lancet, chronic kidney disease has climbed the ranks of leading causes of death, moving from 27th in 1990 to a staggering 9th in 2023. This alarming trend affects an estimated 14% of adults aged 20 and above, a significant increase from just over 12% in 1990. So, what's behind this rise, and why is it so crucial to address?
The study highlights several key factors contributing to this global health crisis. Firstly, the aging population plays a role, as does the increasing prevalence of common risk factors such as diabetes, high blood pressure, and obesity. These conditions, which are becoming more widespread, damage the blood vessels, leading to kidney disease. Dr. Andrew Levey, an expert in nephrology, emphasizes that diabetes and high blood pressure, which are more common with age, are the primary risk factors. Additionally, obesity, linked to these conditions, has emerged as a significant concern over the past two decades.
But here's where it gets controversial: kidney disease often remains asymptomatic until it reaches an advanced stage, at which point patients may already require dialysis or an organ transplant. However, simple tests can detect it earlier, and a range of newer medications can slow its progression. Dr. Susan Quaggin, a renowned nephrologist, stresses the importance of early intervention, stating, "We should be doing a better job of identifying individuals at risk and intervening."
Healthy kidneys are vital organs, acting as powerful filters, processing over 150 liters of fluid from the blood daily. They play a crucial role in filtering out waste and toxins, retaining essential proteins, and maintaining red blood cell production, mineral balance, and bone health. When kidney function is compromised, it can have severe consequences, not just for kidney health but also for cardiovascular health.
Left untreated, chronic kidney disease can progress rapidly to kidney failure, requiring dialysis or a transplant. However, most people with chronic kidney disease are more likely to die from cardiovascular complications such as heart attacks, strokes, or heart failure. This is because kidney disease amplifies the processes leading to cardiovascular conditions. Dr. Quaggin explains that people with kidney disease are at increased risk for high blood pressure, plaque buildup, and hardening of the arteries, all of which place immense stress on the heart.
The connections between cardiovascular, metabolic, and kidney health are becoming increasingly recognized. In 2023, the American Heart Association formally defined "cardiovascular-kidney-metabolic syndrome," a health disorder resulting from the overlap of obesity, diabetes, chronic kidney disease, and cardiovascular disease. This syndrome is expected to receive new guidelines for screening and management next year.
Dr. Josef Coresh, a professor at the New York University Grossman School of Medicine, highlights that metabolic dysfunction is at the root of this issue. He emphasizes that the kidney multiplies the damage, leading to cardiovascular death. Early detection is critical, yet it remains underutilized.
Take the story of Junelle Speller, a healthcare executive in Chicago, who only discovered her kidney disease after being rejected for life insurance due to a blood test result. Despite leading a healthy lifestyle, with regular check-ups and a balanced diet, Ms. Speller, then 32, went on dialysis within months of her diagnosis. She received a kidney transplant from her brother, but it failed. She endured dialysis for eight years before receiving another successful transplant in 2022.
Ms. Speller had a genetic variant that increased her risk, but routine blood and urine tests could have caught early signs of kidney damage. Unfortunately, these tests are often overlooked or not properly utilized, partly due to the cumbersome nature of urine collection and limited awareness about kidney disease.
Current guidelines recommend screening for kidney disease with blood and urine tests for patients with diabetes, high blood pressure, and other risk factors. However, research shows that only 35% of patients with diabetes and a mere 4% of those with high blood pressure receive the urine test for screening. This highlights a significant gap in healthcare practices.
Early diagnosis is crucial to preventing the severe outcomes associated with kidney disease. Dr. Quaggin emphasizes that we now have incredible tools to slow down the progression, including traditional drugs like ACE inhibitors and newer classes of drugs shown to protect kidney function, such as those used to treat heart failure and GLP-1 drugs.
These newer medications are gaining popularity and offer hope for managing kidney disease effectively. Dr. Quaggin expresses optimism, stating, "I would be very hopeful that we could see this arc trend downward if we are able to really identify kidney disease early and implement these medications early."
In conclusion, chronic kidney disease is a growing global health concern, often overlooked until it reaches advanced stages. By understanding the risk factors, recognizing the connections between kidney and cardiovascular health, and prioritizing early detection and intervention, we can work towards reducing the impact of this silent epidemic. The time to act is now.
