The American journal of clinical nutrition
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Whether the association between body mass index (BMI) and all-cause mortality for older adults is the same as for younger adults is unclear. ⋯ For older populations, being overweight was not found to be associated with an increased risk of mortality; however, there was an increased risk for those at the lower end of the recommended BMI range for adults. Because the risk of mortality increased in older people with a BMI <23.0, it would seem appropriate to monitor weight status in this group to address any modifiable causes of weight loss promptly with due consideration of individual comorbidities.