Oncology Medical News about risk of breast cancer;meat and egg consumption

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Meat and egg consumption and risk of breast cancer among Chinese women
Cancer Causes and Control, 06/24/09

Zhang CX et al. - In a study to investigate associations between meat and egg intake and breast cancer risk in Guangdong Chinese women, it appears that processed meat intake was associated with a possible increased risk of breast cancer. There was no significant association between consumption of total and red meat, poultry, fish, or egg with breast cancer risk.

Methods

438 consecutively recruited cases with primary breast cancer were frequency matched to 438 controls by age (5-yr interval) and residence (rural/urban).
Dietary intake was assessed by face-to-face interviews using a validated food frequency questionnaire.
Odds ratios (ORs) and 95% confidence interval (CI) were obtained by using multiple unconditional logistic regression adjusted for various dietary and nondietary confounders.

Results

Borderline increased association of processed meat intake was observed with breast cancer risk.
The multivariate-adjusted OR of breast cancer risk for the highest vs the lowest quartile was 1.44.
No significant association was found between total and red meat, poultry, fish, and egg intake and risk.

Exclusive Author Commentary
Zhang Cai-Xia, Suzanne C Ho, et al., 06/28/09

Dietary changes including increased meat intake and decreased vegetable intake took place in China over the past three decades, and meat has now become an integral component of the diet in China. The association of meat intake and breast cancer risk has been investigated in many epidemiological studies, mostly conducted in Western populations. The exposure to potential dietary risk factors may be different in China compared with that observed in the West. These included a relatively lower consumption of meat and fat, and a higher consumption of vegetables, fruits and soy foods. Our finding of the possible increased risk of processed meat intake on breast cancer risk adds to the existing evidence on the adverse role of processed meat in breast cancer. However, the hospital-based case-control design of this study is susceptible to potential recall and selection biases; and thus further prospective cohort studies are warranted to evaluate this hypothesis.

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