{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,25]],"date-time":"2026-04-25T01:49:08Z","timestamp":1777081748541,"version":"3.51.4"},"reference-count":49,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2019,7,4]],"date-time":"2019-07-04T00:00:00Z","timestamp":1562198400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>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\u201326.1). 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 &gt; 0.05). The present results showed that a high prevalence of hypovitaminosis D was significantly associated with summer in institutionalized elderly individuals.<\/jats:p>","DOI":"10.3390\/nu11071516","type":"journal-article","created":{"date-parts":[[2019,7,4]],"date-time":"2019-07-04T11:13:18Z","timestamp":1562238798000},"page":"1516","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["High Prevalence of Hypovitaminosis D in Institutionalized Elderly Individuals is Associated with Summer in a Region with High Ultraviolet Radiation Levels"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8231-1643","authenticated-orcid":false,"given":"Sara Est\u00e9fani S.","family":"Sousa","sequence":"first","affiliation":[{"name":"Postgraduate Program in Nutrition, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 3000, Lagoa Nova, 59078970 Natal, RN, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M\u00e1rcia Cristina","family":"Sales","sequence":"additional","affiliation":[{"name":"School of Medicine, State University of Roraima, Rua Sete de Setembro, 231, Canarinho, 69306530 Boa Vista, RR, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jos\u00e9 Rodolfo T.","family":"Ara\u00fajo","sequence":"additional","affiliation":[{"name":"Postgraduate Program of Health Sciences, Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias, Petr\u00f3polis, 59010180 Natal, RN, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9729-1243","authenticated-orcid":false,"given":"Karine C.M.","family":"Sena-Evangelista","sequence":"additional","affiliation":[{"name":"Postgraduate Program in Nutrition, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 3000, Lagoa Nova, 59078970 Natal, RN, Brazil"},{"name":"Department of Nutrition, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 3000, Lagoa Nova, 59078970 Natal, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kenio C.","family":"Lima","sequence":"additional","affiliation":[{"name":"Postgraduate Program of Health Sciences, Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias, Petr\u00f3polis, 59010180 Natal, RN, Brazil"},{"name":"Department of Dentistry, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 1787, Lagoa Nova, 59056000 Natal, RN, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5436-5115","authenticated-orcid":false,"given":"Lucia F.C.","family":"Pedrosa","sequence":"additional","affiliation":[{"name":"Postgraduate Program in Nutrition, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 3000, Lagoa Nova, 59078970 Natal, RN, Brazil"},{"name":"Postgraduate Program of Health Sciences, Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias, Petr\u00f3polis, 59010180 Natal, RN, Brazil"},{"name":"Department of Nutrition, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 3000, Lagoa Nova, 59078970 Natal, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,7,4]]},"reference":[{"key":"ref_1","unstructured":"UNFPA (2012). Ageing in the Twenty-First Century: A Celebration and A Challenge, UNFPA."},{"key":"ref_2","unstructured":"(2017, August 22). 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