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Ann Med. 2010 Apr;42(3):178-86. doi: 10.3109/07853890903508887.

Effect of alpha-tocopherol and beta-carotene supplementation on macrovascular complications and total mortality from diabetes: results of the ATBC Study.

Author information

1
National Institute for Health and Welfare, Mannerheimintie 166, Helsinki, Finland. merja.kataja-tuomola@thl.fi

Abstract

AIM:

To determine whether alpha-tocopherol or beta-carotene supplementation affects diabetic macrovascular complications and total mortality.

METHODS:

This study was carried out as part of the Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study, a double-blind, randomized trial with a 2x2 factorial design. A total of 29,133 middle-aged male smokers received either vitamin E 50 mg/day or beta-carotene 20 mg/day, or both, or placebo for a median of 6.1 years. At base-line, 1700 men had type 2 diabetes. Of these men, 662 were diagnosed with first-ever macrovascular complication, and 1142 died during the 19-year follow-up.

RESULTS:

Neither supplementation affected the risk of macrovascular complication or total mortality during the intervention period. For the alpha-tocopherol-supplemented versus no alpha-tocopherol-supplemented, and beta-carotene-supplemented versus no beta-carotene-supplemented we found relative risk (RR) 0.84 (95% confidence interval (CI) 0.65-1.10) and RR 1.15 (95% CI 0.89-1.50) for macrovascular complication, respectively, and RR 1.00 (95% CI 0.80-1.25) and RR 1.06 (95% CI 0.85-1.33) for total mortality, respectively. No essential changes were found in these effects when the follow-up was extended up to 19 years.

CONCLUSION:

Alpha-tocopherol or beta-carotene supplementation has no protective effect on macrovascular outcomes or total mortality of diabetic male smokers.

PMID:
20350251
DOI:
10.3109/07853890903508887
[Indexed for MEDLINE]

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