Silver Book Fact
71.5% of 65-year-olds with coronary heart disease have 3 or more comorbidities and physical limitations–only 3.8% have none.
Joyce G, Keeler E, Shang B, Goldman D. The Lifetime Burden of Chronic Disease among the Elderly: Health and costs of the future elderly. Health Affairs Web Exclusive Collection. 2005; 24(2). http://content.healthaffairs.org/cgi/content/abstract/hlthaff.w5.r18v1