Study Title:

B Vitamins and All-Cause Mortality

Study Abstract

BACKGROUND & AIMS:

Little is known about the direct relationship of B vitamins to mortality in the elderly. All-cause mortality by vitamin B status, using dietary (B-1, B-2, niacin, B-6) or biochemical data (erythrocyte transketolase reductase, erythrocyte glutathione reductase, plasma pyridoxal-phosphate, folate and serum B-12) was evaluated.

METHODS:

The Taiwanese Elderly Nutrition and Health Survey (1999-2000) provided 1747 participants 65 years and over. Dietary and biochemical data were collected at baseline. Survivorship was determined until December 31, 2008.

RESULTS:

Survivors had higher vitamin B-1 and niacin intakes and pyridoxal-phosphate and folate concentrations. Controlled for confounders, and relative to the lowest tertile of vitamin B-1 or B-6 intakes, the hazard ratios (95% confidence interval) for tertile 3 were 0.74 (0.58-0.95) and 0.74 (0.57-0.97), both p for trend values were <0.05. Further adjustment for dietary diversity led to insignificant findings. For pyridoxal-phosphate, compared to those with deficiency levels, the multivariable-adjusted hazard ratios (95% confidence interval) for adequacy was 0.52 (0.38-0.71) with p for trend <0.0001 and unchanged with dietary diversity adjustment.

CONCLUSIONS:

Higher vitamin B-1 and B-6 intakes and plasma pyridoxal-phosphate were associated with lower risk of mortality up to 10 years and could be achieved by increased dietary diversity.

Study Information

Huang YC, Lee MS, Wahlqvist ML.
Prediction of all-cause mortality by B group vitamin status in the elderly
Clinical Nutrition
2011 November
Division of Health Services and Preventive Medicine, Institute of Population Health Sciences, National Health Research Institutes, No. 35 Keyan Road, Zhunan Town, Miaoli County, Taiwan, ROC.

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