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Research: DARBY and colleagues,
Listed in Issue 66
Abstract
DARBY and colleagues, ICRF/MRC/BHF Clinical Trial Service Unit Epidemiological Studies Unit, Radcliffe Infirmary, Harkness Building, Oxford, OX2 6HE, UK investigated the relationship between diet and lung cancer in a case-control study.
Background
Methodology
982 cases of lung cancer and 1486 population controls in south-west England were interviewed about their smoking habits and consumption of foods and supplements rich in retinol or carotene . Data were analyzed for 15 dietary variables including intake of preformed retinol and carotene.
Results
13 of the variables showed significant associations (p<0.01) with lung cancer risk. After adjusting for smoking, 8 of the 13 variables still showed significant associations. When the 15 variables were considered simultaneously, independent significant associations remained for 5: preformed retinol (increased risk); fish liver oil, vitamin pills, carrots and tomato sauce (decreased risk).
Conclusion
The authors concluded that there is at least one as yet unidentified factor that is causally related to lung cancer risk, which was of considerable importance in terms of attributable risk in the study population.
References
Darby S et al. Diet, smoking and lung cancer: a case-control study of 1000 cases and 1500 controls in South-West England. British Journal of Cancer 84 (5): 728-35. Mar 2001.
