Researchers led by Karina Davidson, Director of the Center for Behavioral Cardiovascular Health at Columbia University Medical Center, tracked 1,739 adults for a decade. Nurse assessed participants at the beginning of the study. The participants were surveyed and assessed clinically for depression, hostility, anxiety as well as positive emotions, called the “positive effect.”
“Participants with no positive affect were at a 22% higher risk of … heart disease than those with a little positive affect, who were themselves at 22% higher risk than those with moderate positive affect,” Davidson said in a statement. "As far as we know, this is the first prospective study to examine the relationship between clinically-assessed positive affect and heart disease."
The 862 men and 877 women tracked by Davidson and her colleagues were participants in the 1995 Nova Scotia Health Survey.