Internal medicine
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Objective To calculate the prevalence of anemia based on sex and age using large-scale occupational health examination data, confirm the Hb) distribution in the elderly, and examine the standard for screening for anemia in Japan. Methods Using existing large-scale occupational health examination data of patients who underwent health examinations between April 2015 and March 2022, we calculated the prevalence of anemia based on sex and age. Patients We included 416,366 patients aged 20-89 years who underwent health checkups at health checkup facilities in Japan. ⋯ Furthermore, the mean -2SD of Hb in the elderly men (>65 years) was 12.0 g/dL, larger than the current standard (11.0 g/dL). Conclusion It is imperative to consider the possibility of anemia in young women during health examinations and other screening opportunities, regardless of their history of anemia. In addition, elderly men with Hb levels <12 g/dL should be cautioned about the development of anemic symptoms and the progression of Hb decline.