The CCP antibody test helps to diagnose RA and can be useful in identifying people with a more rapidly erosive form of the disease. RA is a chronic, systemic autoimmune disease that causes inflammation, pain, stiffness, and destructive changes in the hands, feet, and other joints throughout the body.
As you can see from the map above, most of the Illinois population is based in the North East of the state. Chicago, home to 2,695,598 people, remains the largest city in Illinois. It dwarfs the state's other cities â the next largest is Aurora, with 197,899 people.
As of the 2010 United States Census, there were 2,695,598 people and 1,194,337 households residing within the city limits of Chicago. More than half the population of the state of Illinois lives in the Chicago metropolitan area. The 2000 United States Census had shown the population density of the city itself was 12,750.3 people per square mile (4,923.0/kmÂ²), making it one of the nation's most densely populated cities. There were 1,152,868 housing units at an average density of 5,075.8 per square mile (1,959.8/kmÂ²).