Chronic kidney disease is a condition in which kidney function gets progressively more abnormal over time. The metabolic syndrome is a condition in which people are obese and have high blood pressure, high triglyceride levels (a bad type of fat in the blood), low high-density lipoprotein cholesterol levels (“good” cholesterol), and high blood sugar levels. People with the metabolic syndrome are at high risk for developing cardiovascular disease, including heart attack and stroke. It is known that cardiovascular disease puts people at risk for chronic kidney disease, but it is not known whether the metabolic syndrome puts people at risk for chronic kidney disease.