• Narjara Pereira Leite, Tatiana Souza Alvarez, FonsecaFernando Luiz AffonsoFLA0000-0003-1223-1589Centro Universitário Faculdade de Medicina do ABC, Department of Pathology, Discipline of Clinical Analysis - Santo André (SP), Brazil., Sonia Hix, and SarniRoseli Oselka SaccardoROS0000-0001-5839-0871Centro Universitário Faculdade de Medicina do ABC, Department of Pediatrics - Santo André (SP), Brazil..
• Centro Universitário Faculdade de Medicina do ABC - Santo André (SP), Brazil.
• Rev Assoc Med Bras (1992). 2023 Jan 1; 69 (1): 616561-65.

ObjectiveThe aim of this study was to evaluate serum 25(OH)D concentrations in the homebound elderly people and relate them to level of dementia, nutritional risk, and route of dietary administration.MethodsThis is a cross-sectional study involving 207 bedridden elderly people assisted by the Home Care Service in the city of Santo André - SP, from June to December 2016. The following factors were evaluated: dietary intake of vitamin D, arm circumference, triceps skin fold thickness, calf circumference, nutritional risk by Mini-Nutritional Assessment, level of dementia by the adapted Clinical Dementia Rating questionnaire, and laboratory tests such as serum concentrations of 25(OH)D, ultrasensitive C-reactive protein, alkaline phosphatase, serum calcium, and parathormone.ResultsThe mean age of the elderly people was 81.6 (9.2) years. Deficiency of 25(OH)D was observed in 76.3% of the elderly people. There was an inverse correlation between serum concentrations of 25(OH)D: parathormone (r=-0.418, p<0.001) and alkaline phosphatase (r=-0.188, p=0.006) and a direct correlation with serum calcium (r=-0.158, p=0.022). Logistic regression showed that vitamin D deficiency was directly and independently associated with oral feeding (odds ratio 7.71; 95%CI 2.91-20.40).ConclusionBedridden households showed high prevalence of vitamin D deficiency without association with nutritional risk and level of dementia. Oral diet was associated with vitamin D deficiency, possibly due to low consumption of source foods.

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