Low childhood conscientiousness predicts adult obesity

"These results are significant and unique because they show the far-reaching effects of childhood conscientiousness on adult health. Others have shown that more conscientiousness children live longer. Now we have shown that these conscientious children are also healthier at midlife" noted Dr. Hampson.

Hawaii school-children rated by their teachers in the 1960's as less conscientious had worse global health status as adults and had significantly greater obesity, high cholesterol, and increased risk for cardiovascular disease. Childhood conscientiousness was significantly associated with decreased function of the cardiovascular and metabolic systems. This association was independent of the other Big Five personality childhood traits, adult conscientiousness, childhood socioeconomic status, ethnicity, and gender. This is the first study in which all the Big Five personality traits (extraversion, agreeableness, conscientiousness, emotional stability, and intellect/imagination) assessed in childhood have been used to predict objective health status assessed by multiple biomarkers over 40 years later in older adulthood.

In the 1960's, over 2,000 children from entire classrooms in elementary schools on two Hawaiian Islands were comprehensively assessed on their personality characteristics. ORI researchers were funded in 1998 by the National Institute of Mental Health to locate and examine the health-related behaviors and mental and physical health status of these individuals. Almost 75% of those in the original group who could be located (mean age 51 years) have agreed to participate, and over 800 individuals completed a medical and psychological examination supported by subsequent grants from the National Institute on Aging.

The physical examinations took place at the Kaiser Permanente Center for Health Research, Hawaii in Honolulu and at medical clinics on the islands of Kauai, Hawaii, and Maui and included biomarkers of cardiovascular and metabolic systems such as height, weight, waist and hip circumference, blood pressure, cholesterol and fasting blood glucose.

"These findings suggest avenues for further research that may lead to interventions. People who are more conscientious tend to have better health habits and less stress, which protects them from disease. Self-control is a key part of being conscientious, so our findings confirm the importance of teaching children self-control to enable then to grow up to be healthy adults," said Hampson.

Founded in 1960, Oregon Research Institute is a non-profit behavioral research center with offices in Eugene & Portland, Oregon, Seattle, Washington, and in Albuquerque, New Mexico. This research was supported by grant AG020048 from the National Institute on Aging, National Institutes of Health.