Vitamin E and smoking and the risk of lung cancer

Ann N Y Acad Sci. 1993 May 28;686:280-7; discussion 287-8. doi: 10.1111/j.1749-6632.1993.tb39187.x.

Abstract

The hypotheses that the antioxidant vitamin E provides protection against lung cancer and that this hypothetical protection is modified by smoking status were investigated using two different study designs--a cohort study and a nested case-control study--among Finnish men aged 15 years and over. In the cohort study the association between vitamin E intake and lung cancer risk was studied among 5,254 individuals with 121 lung cancer cases that occurred during a 19-year follow-up, and in the nested case-control study the association between serum vitamin E level and lung cancer risk was studied using 144 lung cancer cases and 270 matched controls as a basis. There was a significant inverse association between vitamin E status and lung cancer occurrence among nonsmokers but not among smokers in both designs. The relative risk of lung cancer between the lowest and highest tertiles of vitamin E intake was 3.3 among nonsmokers and 0.8 among smokers. The corresponding results for serum vitamin E were 6.6 and 0.8, respectively. Nonsmokers with simultaneously low serum levels of vitamin E and other micronutrients (i.e., beta-carotene, retinol and selenium) had a 12-fold greater risk of lung cancer in comparison with men having more satisfactory levels. The corresponding number among smokers was three. The results suggest that vitamin E status is primarily associated with lung cancer risk among nonsmokers. Firm conclusions can, however, be drawn only on the basis of intervention trials.

Publication types

  • Comparative Study

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Carotenoids / blood
  • Case-Control Studies
  • Cohort Studies
  • Diet
  • Dose-Response Relationship, Drug
  • Follow-Up Studies
  • Humans
  • Incidence
  • Lung Neoplasms / epidemiology
  • Lung Neoplasms / etiology*
  • Lung Neoplasms / prevention & control
  • Male
  • Middle Aged
  • Nutrition Surveys
  • Risk Factors
  • Selenium / blood
  • Smoking / adverse effects*
  • Vitamin A / blood
  • Vitamin E* / administration & dosage
  • Vitamin E* / blood
  • beta Carotene

Substances

  • beta Carotene
  • Vitamin A
  • Vitamin E
  • Carotenoids
  • Selenium