new york (reuters health) - body composition with a low percentage of body fat —— and the loss of fat over time —— are linked to poor survival in people on hemodialysis, according to a new study.
however, dialysis patients with a high body fat percentage tend to have an inferior quality of life.
previous studies have shown that heavy people have better survival on dialysis, but it has been unclear if this is related to an individual's body fat or muscle mass, dr. kamyar kalantar-zadeh, of harbor-ucla medical center, torrance, and colleagues explain in the american journal of clinical nutrition.
to further investigate, the researchers measured body fat and quality of life in 535 adults on maintenance hemodialysis. the subjects were followed for 30 months or longer.
the team found that quality of life scores were progressively lower as body fat increased.
on the other hand, after accounting for other factors, the patients with body fat making up less than 12 percent of body weight were four times more likely to die during follow up compared with patients with body fat between 24 percent and 36 percent.
body fat was remeasured after 6 months in 411 patients. those who lost body fat had twice the risk of dying compared with those who gained body fat.
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