Research is being conducted on the prevalence, risk factors, and treatment of anemia in various patient populations, including hospitalized older patients. The focus of the studies appears to vary, with some examining anemia in specific settings, such as geriatric and nephrological settings in Italy, while others look at different demographics, including children and women of childbearing age. The scope of the research seems to be broad, with some studies also exploring related topics, such as malnutrition and comorbidities, in different regions and populations.