Higher levels of optimism are associated with longer lifespan, finds study


Team Udayavani, Jun 13, 2022, 9:08 AM IST

Higher levels of optimism were linked to a longer lifespan and living above the age of 90 in women of all racial and ethnic groupings, according to a new study led by Harvard T.H. Chan School of Public Health researchers. The research was published in the ‘American Geriatrics Society’ journal.

“Although optimism itself may be affected by social structural factors, such as race and ethnicity, our research suggests that the benefits of optimism may hold across diverse groups,” said Hayami Koga, a PhD candidate in the Department of Social and Behavioral Sciences at Harvard Chan School and lead author of the study. “A lot of previous work has focused on deficits or risk factors that increase the risks for diseases and premature death. Our findings suggest that there’s value to focusing on positive psychological factors, like optimism, as possible new ways of promoting longevity and healthy ageing across diverse groups.” In a previous study, the research group determined that optimism was linked to a longer lifespan and exceptional longevity, which was defined as living beyond 85 years of age. Because they had looked at mostly white populations in that previous study, Koga and her colleagues broadened the participant pool in the current study to include women from across racial and ethnic groups. According to Koga, including diverse populations in research is important to public health because these groups have higher mortality rates than white populations, and there is limited research about them to help inform health policy decisions.

For this study, the researchers analyzed data and survey responses from 159,255 participants in the Women’s Health Initiative, which included postmenopausal women in the U.S. The women enrolled at ages 50-79 from 1993 to 1998 and were followed for up to 26 years. Of the participants, the 25 per cent who were the most optimistic were likely to have a 5.4 per cent longer lifespan and a 10 per cent greater likelihood of living beyond 90 years than the 25 per cent who were the least optimistic. The researchers also found no interaction between optimism and any categories of race and ethnicity, and these trends held true after taking into account demographics, chronic conditions, and depression. Lifestyle factors, such as regular exercise and healthy eating, accounted for less than a quarter of the optimism-lifespan association, indicating that other factors may be at play.

Koga said that the study’s results could reframe how people view the decisions that affect their health. “We tend to focus on the negative risk factors that affect our health,” said Koga. “It is also important to think about the positive resources such as optimism that may be beneficial to our health, especially if we see that these benefits are seen across racial and ethnic groups.”

(With inputs from ANI)

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