Defining low vs. high is complicated, Sueoka says, as there is controversy about the measurements.
低与高的定义是复杂的，Sueoka说，因为关于测量有争议。
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Sueoka and her colleagues focused on 697 men, average age 72, who were seen at six different U. S. centers from 2000 to 2005 while participating in a study to evaluate fracture risk in older men.