Brian Sullivan

A study published by the American Psychosomatic Society has proven that personality is linked to longevity. 7Of 216 subjects who completed the Minnesota Multiphasic Personality Inventory (MMPI) for research at the Mayo Clinic from 1962 to 1965, a total of 7080 subjects (98.1%) were followed over four decades.

Of this total, 4634 subjects (65.5%) died during follow-up. Pessimistic, anxious, and depressive personality traits were associated with increased all-cause mortality in both men and women. In addition, we observed a linear trend of increasing risk from the first to the fourth quartile for all three scales. Results were similar in additional analyses considering the personality scores as continuous variables, in analyses combining the three personality traits into a composite neuroticism score, and in several sets of sensitivity analyses. These associations remained significant even when personality was measured early in life (ages 20–39 years).

The study concluded that personality traits related to neuroticism are associated with an increased risk of all-cause mortality even when they are measured early in life.

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"Most people overeat 100 percent, and oversleep 100 percent, because they like it.
That extra 100 percent makes them unhealthy and inefficient. The person who sleeps eight or ten hours a night is never fully asleep and never fully awake - they have only different degrees of doze through the twenty-four hours."

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