Friedmann, E., Katcher, A. H., Lynch, J. J. et al. 1980. Animal companions and one-year survival of patients after discharge from a coronary care unit. Public Health Reports 95, 307-312.
Of the 39 patients who did not own pets, 11 (28%) died, whereas only 3 (6%) of the 53 pet owners died within 1 year.
Year
1980