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Consumption of fruit and vegetables and risk of lung cancer: a case-control study in Galicia, Spain
Olga Dosil-Díaz1, Alberto Ruano-Ravina, Juan J Gestal-Otero
1Galician Public Foundation for Health Emergencies-061, Santiago de Compostela, Spain.
Objective:
We analyzed the effect of fruit and vegetable intake on lung cancer risk in a population in northwest Spain.
Methods:
We analyzed data from a hospital-based case-control study including 295 histologically confirmed cases and 322 controls. Controls were patients attending the hospital for minor surgery. There was a minimum age limit of 35 y and sampling was carried out on a sex-frequency basis.
Results:
After adjustment for sex, age, tobacco use, and occupation, no protective effect of overall consumption of fruit was present (odds ratio 1.49, 95% confidence interval 0.81-2.73). Green leafy vegetables conferred a protective effect (odds ratio 0.50, 95% confidence interval 0.30-0.83).
Conclusion:
These findings indicate that green leafy vegetables, rather than fruit, might have a genuine protective effect against lung cancer.
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