7 Thoughts That Are Bad For You

Our personalities do more for us than determine our social circles. Temperament can impact a person's physical health.

"The idea that behavior or personality traits can influence health is one that's been around for a long time. We're just now getting a handle on to what extent they do," said Stephen Boyle of Duke University Medical Center in North Carolina.

From those with a chill demeanor to the completely frazzled types, mental factors are ultimately tied to physical health. And while a highly neurotic person might deteriorate more quickly than others, not every character trait will kill you. Some might even boost lifetimes.

Lack of Self-control

Late for appointments? Can't keep your desk organized? No self-control? These seemingly benign qualities could take a toll on your health.

A review of more than 20 studies and nearly 9,000 participants revealed people who are conscientious -- organized and self-disciplined, as opposed to impulsive -- live two to four years longer than others. Study researcher Howard S. Friedman of the University of California, Riverside, suspects the boost in lifetime can be attributed partly to the fact that highly conscientious individuals are less likely to smoke or drink to excess, and live more stable and less stressful lives. The study is detailed in a 2008 issue of the journal Health Psychology.

Anxiety

The jitters can put a strain on your noggin, research suggests. Compared with the highly frazzled, individuals with a mellow demeanor who are outgoing may be less likely to develop dementia, which can be caused by Alzheimer's disease and other illnesses. The claim is based on a study that followed more than 500 elderly individuals for five years. Among the outgoing extroverts, dementia risk was 50 percent lower for participants who were calm compared with those who were prone to distress.

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