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Abstract Title:

Plasma vitamin D and mortality in older men: a community-based prospective cohort study.

Abstract Source:

Am J Clin Nutr. 2010 Oct;92(4):841-8. Epub 2010 Aug 18. PMID: 20720256

Abstract Author(s):

Karl Michaëlsson, John A Baron, Greta Snellman, Rolf Gedeborg, Liisa Byberg, Johan Sundström, Lars Berglund, Johan Arnlöv, Per Hellman, Rune Blomhoff, Alicja Wolk, Hans Garmo, Lars Holmberg, Håkan Melhus

Article Affiliation:

Department of Surgical Sciences and Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden. karl.michaelsson@surgsci.uu.se

Abstract:

BACKGROUND: Vitamin D status is known to be important for bone health but may also affect the development of several chronic diseases, including cancer and cardiovascular diseases, which are 2 major causes of death. OBJECTIVE: We aimed to examine how vitamin D status relates to overall and cause-specific mortality. DESIGN: The Uppsala Longitudinal Study of Adult Men, a community-based cohort of elderly men (mean age at baseline: 71 y; n = 1194), was used to investigate the association between plasma 25-hydroxyvitamin D [25(OH)D] and mortality. Total plasma 25(OH)D was determined with HPLC atmospheric pressure chemical ionization mass spectrometry. Proportional hazards regression was used to compute hazard ratios (HRs). RESULTS: During follow-up (median: 12.7 y), 584 (49%) participants died. There was a U-shaped association between vitamin D concentrations and total mortality. An approximately 50% higher total mortality rate was observed among men in the lowest 10% (<46 nmol/L) and the highest 5% (>98 nmol/L) of plasma 25(OH)D concentrations compared with intermediate concentrations. Cancer mortality was also higher at low plasma concentrations (multivariable-adjusted HR: 2.20; 95% CI: 1.44, 3.38) and at high concentrations (HR: 2.64; 95% CI: 1.46, 4.78). For cardiovascular death, only low (HR: 1.89; 95% CI: 1.21, 2.96) but not high (HR: 1.33; 95% CI: 0.69, 2.54) concentrations indicated higher risk. CONCLUSIONS: Both high and low concentrations of plasma 25(OH)D are associated with elevated risks of overall and cancer mortality. Low concentrations are associated with cardiovascular mortality.

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Sayer Ji
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