Health insurance would be a matter of life and death suggests the study referenced below:
Benjamin D. Sommers, Sharon K. Long, Katherine Baicker; Changes in Mortality After Massachusetts Health Care ReformA Quasi-experimental StudyChanges in Mortality After Massachusetts Health Care Reform. Annals of Internal Medicine. 2014 May;160(9):585-593.
The results are widely reported in the media and blogosphere.
Drs. Sommers and Baicker work in the Department of Health Policy and Management, Harvard School of Public Health, Kresge Building, Room 406, 677 Huntington Avenue, Boston, MA 02115 and Dr. Long works at the Health Policy Center, Urban Institute, 2100 M Street NW, Washington, DC 20037.
Since the design is purely observational, results must not serve to inference nor be generalized nevertheless they go in the same direction as common sense, and logic: health insurance therefore care accessibility therefore life prolongation. But until now that chain of events had still to be observed at a large-scale (state-scale) and this is the merit of this study.