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High Prevalence of Hypovitaminosis D in Institutionalized Elderly Individuals is Associated with Summer in a Region with High Ultraviolet Radiation Levels

1
Postgraduate Program in Nutrition, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 3000, Lagoa Nova, 59078970 Natal, RN, Brazil
2
School of Medicine, State University of Roraima, Rua Sete de Setembro, 231, Canarinho, 69306530 Boa Vista, RR, Brazil
3
Postgraduate Program of Health Sciences, Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias, Petrópolis, 59010180 Natal, RN, Brazil
4
Department of Nutrition, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 3000, Lagoa Nova, 59078970 Natal, Brazil
5
Department of Dentistry, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 1787, Lagoa Nova, 59056000 Natal, RN, Brazil
*
Author to whom correspondence should be addressed.
Nutrients 2019, 11(7), 1516; https://doi.org/10.3390/nu11071516
Received: 13 May 2019 / Revised: 26 June 2019 / Accepted: 1 July 2019 / Published: 4 July 2019
(This article belongs to the Special Issue Ageing and Nutrition through Lifespan)
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Abstract

Vitamin D may play a significant role in regulating the rate of aging. The objective of the study was to assess vitamin D status and its associated factors in institutionalized elderly individuals. A total of 153 elderly individuals living in Nursing Homes (NH) were recruited into the study. Serum 25-hydroxyvitamin D [25(OH)D] concentration was used as the biomarker of vitamin D status, and it was considered as the dependent variable in the model. The independent variables were the type of NH, age-adjusted time of institutionalization, age, sex, skin color, body mass index, waist and calf circumference, physical activity practice, mobility, dietary intake of vitamin D and calcium, vitamin D supplementation, use of antiepileptics, and season of the year. Serum 25(OH)D concentrations less than or equal to 29 ng/mL were classified as insufficient vitamin D status. The prevalences of inadequate dietary intake of vitamin D and calcium were 95.4% and 79.7%, respectively. The prevalence of hypovitaminosis D was 71.2%, and the mean serum concentration of 25(OH)D was 23.9 ng/mL (95% confidence interval [CI]: 22.8–26.1). Serum 25(OH)D concentration was associated with the season of summer (p = 0.046). There were no associations with other independent variables (all p > 0.05). The present results showed that a high prevalence of hypovitaminosis D was significantly associated with summer in institutionalized elderly individuals. View Full-Text
Keywords: vitamin D; elderly individuals; nursing homes vitamin D; elderly individuals; nursing homes
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MDPI and ACS Style

Sousa, S.E.S.; Sales, M.C.; Araújo, J.R.T.; Sena-Evangelista, K.C.; Lima, K.C.; Pedrosa, L.F. High Prevalence of Hypovitaminosis D in Institutionalized Elderly Individuals is Associated with Summer in a Region with High Ultraviolet Radiation Levels. Nutrients 2019, 11, 1516.

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