alexa The definition of anemia in older persons.
Nutrition

Nutrition

Journal of Nutrition & Food Sciences

Author(s): Izaks GJ, Westendorp RG, Knook DL

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Abstract CONTEXT: Whether hemoglobin concentrations defined as anemia by the World Health Organization (WHO) are associated with increased mortality in older persons is not known. OBJECTIVE: To investigate the association between hemoglobin concentration and cause-specific mortality in older persons. DESIGN: Community-based study conducted from 1986 to 1996 (follow-up period, 10 years). SETTING: Leiden, the Netherlands. PARTICIPANTS: A total of 1016 community residents aged 85 years and older were eligible and 872 agreed to have a blood sample taken. Hemoglobin concentration was measured in 755 persons (74\%). MAIN OUTCOME MEASURES: Hemoglobin concentration, 10-year survival, and primary cause of death. According to the WHO criteria, anemia was defined as a hemoglobin concentration below 7.5 mmol/L (120 g/L) in women and below 8.1 mmol/L (130 g/L) in men. RESULTS: Compared with persons with a normal hemoglobin concentration, the mortality risk was 1.60 (95\% confidence interval [CI], 1.24-2.06; P<.001) in women with anemia, and 2.29 (95\% CI, 1.60-3.26; P<.001) in men with anemia. In both sexes, the mortality risk increased with lower hemoglobin concentrations. In persons without self-reported clinical disease at baseline, the mortality risk of anemia was 2.21 (95\% CI, 1.37-3.57; P=.002). Mortality from malignant and infectious diseases was higher in persons with anemia. CONCLUSIONS: Anemia defined by the WHO criteria was associated with an increased mortality risk in persons aged 85 years and older. The criteria are thus appropriate for older persons. A low hemoglobin concentration at old age signifies disease.
This article was published in JAMA and referenced in Journal of Nutrition & Food Sciences

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