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Item #2
Even
Attempted Weight Loss Reduces Mortality
Attempts
at loss weight, whether successful or not, may reduce their risk of
death.
According
to a report published in the March 4th issue of the Annals of Internal
Medicine. Although many
health risks have been linked with being overweight, the effect of
weight loss on long-term health outcomes and longevity has been
unclear, lead author Dr. Edward W. Gregg and colleagues, from the US
Centers for Disease Control and Prevention in Atlanta, note.
Furthermore, most of the studies that have looked at the effect on
mortality rates have not assessed intentional weight loss.
Dr.
Gregg's team evaluated findings from a study of 6391 overweight and
obese adults living in the US in 1989. Intention to lose weight and
recent weight change were determined by self-reports. The subjects
were then followed for 9 years.
Subjects
who reported intentional weight loss were 24% less likely to die than
subjects who did not try to lose weight and did not lose weight. In
contrast, unintentional weight loss was associated with a 31% higher
mortality in subjects who were not trying to lose weight.
Still,
the researchers found that persons who attempted to lose weight,
regardless of actual success, were less likely to die than
were their peers who did not even attempt to lose weight. In fact,
persons who attempted to lose weight, but actually gained weight, were
slightly less likely to die than persons who were not trying to lose
weight and did not lose weight.
The
findings indicate that intent plays a key role in determining whether
weight loss will be beneficial, the authors note.
However,
the results leave several issues unresolved, the investigators point
out. "Our results do no fully clarify the issue of whether
greater intentional weight loss confers greater benefits," they
note. "Also, important questions about the effect of weight loss
intent, weight loss, and weight gain on mortality unanswered,
including the attributes of those who reported attempting to lose
weight."
Ann
Intern Med 2003;138:383-389.
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