A freelance cameraman's appendix ruptured and by the time he was admitted to surgery, it was too late. A self-employed mother of two is found dead in bed from undiagnosed heart disease. A 26-year-old aspiring fashion designer collapsed in her bathroom after feeling unusually fatigued for days. What all three of these people have in common is that they experienced symptoms, but didn't seek care because they were uninsured and they worried about the hospital expense, according to their families. All three died. Research released ... in the American Journal of Public Health estimates that 45,000 deaths per year in the United States are associated with the lack of health insurance. If a person is uninsured, it means you're at mortal risk," said one of the authors, Dr. David Himmelstein, an associate professor of medicine at Harvard Medical School. The researchers examined government health surveys from more than 9,000 people aged 17 to 64, taken from 1986-1994, and then followed up through 2000. They determined that the uninsured have a 40 percent higher risk of death than those with private health insurance as a result of being unable to obtain necessary medical care. The researchers then extrapolated the results to census data from 2005 and calculated there were 44,789 deaths associated with lack of health insurance.