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High prevalence of vitamin D insufficiency in healthy elderly people living at home in Argentina

Abstract

Objective: To evaluate the nutritional status of vitamin D in urban populations of healthy elderly people living at home, in different regions of Argentina.

Design: Cross-sectional study.

Subjects: In total, 386 ambulatory subjects over 65 y of age from seven cities (between latitude 26°S and 55°S) were asked to participate between the end of winter and the beginning of spring. Of these, 369 accepted, 30 were excluded because of medical history or abnormal biochemical determinations. Finally, 339 subjects (226 women and 113 men) (X±s.d.) (71.3± 5.2 y) were included.

Results: Serum 25OHD levels were lowest in the South (latitude range: 41°S–55°S): 14.2±5.6 ng/ml (P<0.0001vs North and Mid regions); highest in the North (26°S–27°S): 20.7±7.4 ng/ml (P<0.03 vs Mid, P<0.0001vs South); and intermediate in the Mid region (33°S–34°S) 17.9±8.2 ng/ml. Serum mid-molecule PTH (mmPTH) and 25OHD were inversely related: (r=−0.24, P<0.001). A cutoff level of 25OHD at which serum mmPTH levels began to increase was established at 27 ng/ml. A high prevalence (87–52%) of subjects with 25OHD levels in the deficiency-insufficiency range (25OHD levels <20 ng/ml) was detected.

Conclusion: This study shows that vitamin D deficiency/insufficiency in the elderly is a worldwide problem. Correction of this deficit would have a positive impact on bone health of elderly people.

Sponsorship: Asociación Argentina de Osteología y Metabolismo Mineral (AAOMM).

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Contributions

Guarantor: Beatriz Oliveri.

Contributors: BO, LP and AB took part in the protocol design, and writing and editing of the report. ML took part in the protocol design. CM took part in the writing and editing of the report. MSP carried out statistical analysis and participated in writing the report. AW, GR, EP, JLG, GP, AN and AC participated in recruiting the patients and analyzing their data. SZ, CC and JS provided the biochemical intervention.

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Correspondence to B Oliveri.

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Research Comitée of the Asociación Argentina de Osteología y Metabolismo Mineral (AAOMM)

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Oliveri, B., Plantalech, L., Bagur, A. et al. High prevalence of vitamin D insufficiency in healthy elderly people living at home in Argentina. Eur J Clin Nutr 58, 337–342 (2004). https://doi.org/10.1038/sj.ejcn.1601786

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