Prevalence of vitamin D deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics

Marcelo Azevedo Cabral,1 Carla Núbia Borges,1 Juliana Maria Coelho Maia,1 Caio Augusto Martins Aires,2 Francisco Bandeira3 1Department of Clinical Medicine, University of Pernambuco Medical School, 2Department of Biomedicine, University of Pernambuco Medical School, 3Division of Endocrino...

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Autores principales:	Cabral MA, Borges CN, Maia JMC, Aires CAM, Bandeira F
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2013
Materias:	vitamin D sun index elderly men prevalence Geriatrics RC952-954.6
Acceso en línea:	https://doaj.org/article/d57f7b30b1f743a880c4213a6c964f3a
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spelling	oai:doaj.org-article:d57f7b30b1f743a880c4213a6c964f3a2021-12-02T07:15:26ZPrevalence of vitamin D deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics1178-1998https://doaj.org/article/d57f7b30b1f743a880c4213a6c964f3a2013-10-01T00:00:00Zhttps://www.dovepress.com/prevalence-of-vitamin-d-deficiency-during-the-summer-and-its-relations-peer-reviewed-article-CIAhttps://doaj.org/toc/1178-1998Marcelo Azevedo Cabral,1 Carla Núbia Borges,1 Juliana Maria Coelho Maia,1 Caio Augusto Martins Aires,2 Francisco Bandeira3 1Department of Clinical Medicine, University of Pernambuco Medical School, 2Department of Biomedicine, University of Pernambuco Medical School, 3Division of Endocrinology, University of Pernambuco Medical School, Recife, Brazil Objective: The aim of the study reported here was to determine the prevalence of vitamin D deficiency among elderly men and its association with sun exposure and skin phototypes. Subjects and methods: This was an analytical cross-sectional study, which involved 284 men aged 60 years or over, randomly recruited from a basic care unit in the city of Recife (Brazil). Measurements: Serum levels of 25 hydroxyvitamin D (25(OH)D), sun index, and skin phototypes were evaluated. Results: The prevalence of vitamin D deficiency was 31.5% and 66.7% when cut points of less than 20 and 30 ng/mL, respectively, were used. Mean serum 25(OH)D was 27.86 ± 13.52 standard deviation (SD) ng/mL. There was no difference (P = 0.113) in 25(OH)D (23.98 ± 14.66 SD vs 29.88 ± 13.78 SD) between individuals in the lowest quartile (Q) of the sun index (Q1: 1.96) compared with those in the highest (Q4: 7.86). When considering a cutoff of 20 ng/mL, the sun index was different in the two groups (P = 0.006), but there was no difference when cutoffs of 25 and 30 ng/mL were used. After adjustment, sun index and body mass index were associated positively and negatively, respectively with serum 25(OH)D independently. Most subjects (66.7%) had Fitzpatrick’s skin phototypes IV, V, and VI. Low calcium intake was observed in 72%. There was no difference in serum 25(OH)D levels between patients with low intake and those with intermediate and high intakes. Only 2.5% were taking a vitamin supplement. Conclusion: We found a high prevalence of vitamin D deficiency among elderly men despite their high sun exposure during the summer months. Keywords: sun index, serum 25(OH)D levels, body mass index, BrazilCabral MABorges CNMaia JMCAires CAMBandeira FDove Medical Pressarticlevitamin Dsun indexelderly menprevalenceGeriatricsRC952-954.6ENClinical Interventions in Aging, Vol Volume 8, Pp 1347-1351 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	vitamin D sun index elderly men prevalence Geriatrics RC952-954.6
spellingShingle	vitamin D sun index elderly men prevalence Geriatrics RC952-954.6 Cabral MA Borges CN Maia JMC Aires CAM Bandeira F Prevalence of vitamin D deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics
description	Marcelo Azevedo Cabral,1 Carla Núbia Borges,1 Juliana Maria Coelho Maia,1 Caio Augusto Martins Aires,2 Francisco Bandeira3 1Department of Clinical Medicine, University of Pernambuco Medical School, 2Department of Biomedicine, University of Pernambuco Medical School, 3Division of Endocrinology, University of Pernambuco Medical School, Recife, Brazil Objective: The aim of the study reported here was to determine the prevalence of vitamin D deficiency among elderly men and its association with sun exposure and skin phototypes. Subjects and methods: This was an analytical cross-sectional study, which involved 284 men aged 60 years or over, randomly recruited from a basic care unit in the city of Recife (Brazil). Measurements: Serum levels of 25 hydroxyvitamin D (25(OH)D), sun index, and skin phototypes were evaluated. Results: The prevalence of vitamin D deficiency was 31.5% and 66.7% when cut points of less than 20 and 30 ng/mL, respectively, were used. Mean serum 25(OH)D was 27.86 ± 13.52 standard deviation (SD) ng/mL. There was no difference (P = 0.113) in 25(OH)D (23.98 ± 14.66 SD vs 29.88 ± 13.78 SD) between individuals in the lowest quartile (Q) of the sun index (Q1: 1.96) compared with those in the highest (Q4: 7.86). When considering a cutoff of 20 ng/mL, the sun index was different in the two groups (P = 0.006), but there was no difference when cutoffs of 25 and 30 ng/mL were used. After adjustment, sun index and body mass index were associated positively and negatively, respectively with serum 25(OH)D independently. Most subjects (66.7%) had Fitzpatrick’s skin phototypes IV, V, and VI. Low calcium intake was observed in 72%. There was no difference in serum 25(OH)D levels between patients with low intake and those with intermediate and high intakes. Only 2.5% were taking a vitamin supplement. Conclusion: We found a high prevalence of vitamin D deficiency among elderly men despite their high sun exposure during the summer months. Keywords: sun index, serum 25(OH)D levels, body mass index, Brazil
format	article
author	Cabral MA Borges CN Maia JMC Aires CAM Bandeira F
author_facet	Cabral MA Borges CN Maia JMC Aires CAM Bandeira F
author_sort	Cabral MA
title	Prevalence of vitamin D deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics
title_short	Prevalence of vitamin D deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics
title_full	Prevalence of vitamin D deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics
title_fullStr	Prevalence of vitamin D deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics
title_full_unstemmed	Prevalence of vitamin D deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics
title_sort	prevalence of vitamin d deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics
publisher	Dove Medical Press
publishDate	2013
url	https://doaj.org/article/d57f7b30b1f743a880c4213a6c964f3a
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Prevalence of vitamin D deficiency during the summer and its relationship with sun exposure and skin phototype in elderly men living in the tropics

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