High blood pressure. A creatinine blood test greater than 1.2 for women and 1.4 for men. In kidney diseases, creatinine levels in the blood may increase.
Creatinine levels vary with age, race and body size.
More frequent urination, particularly at night. Difficult or painful urination. Puffiness around eyes, swelling of hands and feet, especially in children. More than 20 million Americans have diseases of the kidney and urinary tract. More than 90,000 die each year because of these diseases.