New evidence that optimists live longer
After decades of research, a new study links optimism and prolonged life
August 26, 2019
Science Daily/Boston University School of Medicine
After decades of research, a new study links optimism and prolonged life.
Researchers from Boston University School of Medicine (BUSM), National Center for PTSD at VA Boston Healthcare System and Harvard T.H. Chan School of Public Health, have found that individuals with greater optimism are more likely to live longer and to achieve "exceptional longevity," that is, living to age 85 or older.
Optimism refers to a general expectation that good things will happen, or believing that the future will be favorable because we can control important outcomes. Whereas research has identified many risk factors that increase the likelihood of diseases and premature death, much less is known about positive psychosocial factors that can promote healthy aging.
The study was based on 69,744 women and 1,429 men. Both groups completed survey measures to assess their level of optimism, as well as their overall health and health habits such as diet, smoking and alcohol use. Women were followed for 10 years, while the men were followed for 30 years. When individuals were compared based on their initial levels of optimism, the researchers found that the most optimistic men and women demonstrated, on average, an 11 to 15 percent longer lifespan, and had 50-70 percent greater odds of reaching 85 years old compared to the least optimistic groups. The results were maintained after accounting for age, demographic factors such as educational attainment, chronic diseases, depression and also health behaviors, such as alcohol use, exercise, diet and primary care visits.
"While research has identified many risk factors for diseases and premature death, we know relatively less about positive psychosocial factors that can promote healthy aging," explained corresponding author Lewina Lee, PhD, clinical research psychologist at the National Center for PTSD at VA Boston and assistant professor of psychiatry at BUSM. "This study has strong public health relevance because it suggests that optimism is one such psychosocial asset that has the potential to extend the human lifespan. Interestingly, optimism may be modifiable using relatively simple techniques or therapies."
It is unclear how exactly optimism helps people attain longer life. "Other research suggests that more optimistic people may be able to regulate emotions and behavior as well as bounce back from stressors and difficulties more effectively," said senior author Laura Kubzansky, PhD, MPH, Lee Kum Kee Professor of Social and Behavioral Sciences and co-director, Lee Kum Sheung Center for Health and Happiness at the Harvard T.H. Chan School of Public Health. The researchers also consider that more optimistic people tend to have healthier habits, such as being more likely to engage in more exercise and less likely to smoke, which could extend lifespan. "Research on the reason why optimism matters so much remains to be done, but the link between optimism and health is becoming more evident," noted senior author Fran Grodstein, ScD, professor of epidemiology at the Harvard T.H. Chan School of Public Health and professor of medicine at the Channing Division of Network Medicine at Brigham and Women's Hospital and Harvard Medical School.
"Our study contributes to scientific knowledge on health assets that may protect against mortality risk and promote resilient aging. We hope that our findings will inspire further research on interventions to enhance positive health assets that may improve the public's health with aging," added Lee.
https://www.sciencedaily.com/releases/2019/08/190826150700.htm
Optimistic people sleep better, longer
August 7, 2019
Science Daily/University of Illinois at Urbana-Champaign, News Bureau
People who are the most optimistic tend to be better sleepers, a study of young and middle-aged adults found.
More than 3,500 people ages 32-51 were included in the study sample. The participants included people in Birmingham, Alabama; Oakland, California; Chicago; and Minneapolis.
The research was led by Rosalba Hernandez, a professor of social work at the University of Illinois.
"Results from this study revealed significant associations between optimism and various characteristics of self-reported sleep after adjusting for a wide array of variables, including socio-demographic characteristics, health conditions and depressive symptoms," Hernandez said.
Participants' levels of optimism were measured using a 10-item survey, which asked them to rate on a five-point scale how much they agreed with positive statements such as "I'm always optimistic about my future" and with negatively worded sentences such as "I hardly expect things to go my way."
Scores on the survey ranged from six (least optimistic) to 30 (most optimistic).
Participants reported on their sleep twice, five years apart, rating their overall sleep quality and duration during the prior month. The survey also assessed their symptoms of insomnia, difficulty falling asleep and the number of hours of actual sleep they obtained each night.
A subset of the participants was part of an ancillary sleep study based in Chicago and wore activity monitors for three consecutive days -- including two weeknights and one weekend night. Participants wore the monitors on two occasions a year apart.
The monitors collected data on their sleep duration, percent of time asleep and restlessness while sleeping.
Hernandez and her co-authors found that with each standard deviation increase -- the typical distance across data points -- in participants' optimism score they had 78% higher odds of reporting very good sleep quality.
Likewise, individuals with greater levels of optimism were more likely to report that they got adequate sleep, slumbering six to nine hours nightly. And they were 74% more likely to have no symptoms of insomnia and reported less daytime sleepiness.
According to a 2016 report by the Centers for Disease Control and Prevention, about 1 in 3 U.S. adults fails to get adequate sleep, escalating their risks of many chronic diseases.
"The lack of healthy sleep is a public health concern, as poor sleep quality is associated with multiple health problems, including higher risks of obesity, hypertension and all-cause mortality," Hernandez said. "Dispositional optimism -- the belief that positive things will occur in the future -- has emerged as a psychological asset of particular salience for disease-free survival and superior health."
Although a significant and positive association was found between optimism and better-quality sleep, Hernandez suggested that the findings should be interpreted cautiously.
While the scientists aren't sure of the exact mechanism through which optimism influences sleep patterns, they hypothesize that positivity may buffer the effects of stress by promoting adaptive coping, which enables optimists to rest peacefully.
"Optimists are more likely to engage in active problem-focused coping and to interpret stressful events in more positive ways, reducing worry and ruminative thoughts when they're falling asleep and throughout their sleep cycle," Hernandez said.
The findings, published recently in the journal Behavioral Medicine, bolster those of a prior study, in which Hernandez and her co-authors found that optimists ages 45-84 were twice as likely to have ideal heart health.
Kiarri N. Kershaw, Juned Siddique, Honghan Ning and Donald M. Lloyd-Jones, all of Northwestern University; Julia K. Boehm of Chapman University; Laura D. Kubzansky of Harvard University; and Ana Diez-Roux of Drexel University co-wrote that study. That paper was published in the journal Health Behavior and Policy Review in 2015.
The sample for the current study was drawn from the Coronary Artery Risk Development in Young Adults study, which explored the development and progression of cardiovascular disease risk factors in a U.S. sample of non-Hispanic white and African American adults.
https://www.sciencedaily.com/releases/2019/08/190807112941.htm