To the Editor: Worldwide, the rapidly rising population of elderly people (≥60) is emerging as an area of great importance and one of the major issues demanding special attention in the present millennium.1 Per United Nations estimates (2007), the world's population is on track to surpass 9 billion persons, and the number of elderly people will reach 2 billion by 2050.2 Anemia is one of the foremost and most common enemies of elderly people, and its prevalence increases with age.3, 4 Anemia in elderly people is associated with greater morbidity, mortality, and disability and poorer physical performance and muscle strength.5, 6 Anemia is widespread in elderly people in India, with a reported range of 27.2% to 93.7%.7, 8 Approximately 80% of elderly people in India are rural residents.9 Hence, keeping in mind the gravity and the exigency of the anemia problem, the present study was pursued with the main objective of determining the prevalence of anemia in an elderly rural population to facilitate initiation of appropriate interventions to control the problem. A cross-sectional community-based study was conducted in a rural community development block of Haryana state in northern India with a population of approximately 100,000 in 24 villages served by 91 Anganwadi centers (centers to provide health, nutritional, and educational services to pregnant and lactating mothers and young children). Taking a conservative estimate of approximately 30% prevalence (p) of anemia in elderly people with 10% allowable error, the calculated sample size at a 95% confidence level was 933, which was rounded to 1,000. To obtain the required sample size assuming 6% to 7% of elderly people in study population, 15 of the 91 Anganwadi centers were selected randomly, covering a population of 15,760. All persons aged 60 and older in the sample study population who gave informed consent were included in the study. A pretested, semistructured schedule was used for collection of required data and blood samples in screw-capped tubes containing 5 mL of Drabkins reagent. Hemoglobin (Hb) levels were estimated using the cyanmethemoglobin method on the same day or occasionally the next morning in the Pathology Department of the Graduate Institute of Medical Sciences Rohtak. The data collected and laboratory reports were analyzed and interpreted using SPSS software (version 7.0, SPSS Institute, Inc., Chicago, IL). Statistical analysis included percentages and the chi-square test. The Post Graduate Board of Studies in Medicine and Allied Sciences gave ethical approval of the study plan. Of a total 1,123 elderly people (558 men and 565 women), 1,005 (499 men, 506 women) could be contacted; of these, 497 men and 503 women gave informed consent for participation in the study and were included. Of the remaining 118, 27 died during the study period before being contacted, and 91 elderly could not be contacted even after repeated attempts. Using the World Health Organization criteria, more than 96% of the subjects were anemic, 50.4% with a Hb level less than 10 g% and 4.8% were severely anemic (Hb<7 g%) (Table 1). Hence, in terms of prevalence, the magnitude of the anemia problem was high (>40%), although in terms of severity, it was moderate (1–9%). Mean Hb level in women (9.40±0.07 g%) was approximately 1 g less than that of men (10.36±0.08 g%), and this difference was highly significant. Prevalence of anemia in women (96.6%) in the present study area was almost the same as reported in a previous study8 (93.7%), but was much higher in men (84.1% vs 33.3% in the previous study). Such a large difference in prevalence in men between the studies could not be explained with the available information, although it could be due to rural–urban differences. Another study7 reported the total prevalence of anemia in elderly men and women in urban areas of Bangalore as 27.2% with Hb less than 10 g%, versus 50.4% in the present study (Hb<10 g%). The comparative low prevalence could be due to a larger proportion of males (56% vs 44% women) in addition to urban factors in that study. A comparatively low prevalence of anemia in elderly people in developed nations (∼10% in most of the studies) indicated that anemia is a multidimensional disease interrelated with total development. India may take years to attain that level. The prevalence of anemia was extraordinarily high in an elderly rural population. The study made a strong case for investigating the causes of anemia in elderly people to initiate appropriate control measures. The authors sincerely acknowledge the participation of all of the elderly people in the study. Laboratory services extended by Pathology Department of the Institute are also thankfully acknowledged. Conflict of Interest: No financial, personal, or potential conflict was involved in the study. Author Contributions: All authors meet the criteria for authorship stated in the Uniform Requirements for Manuscripts Submitted to Biomedical Journals. Sponsor's Role: None.
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