Diet and prostatic cancer: a case-control study in Hawaii

Area of Science:

• Epidemiology
• Nutritional Science
• Oncology

Background:

• Prostate cancer is a significant health concern, particularly in aging populations.
• Dietary factors are increasingly recognized as potential modulators of cancer risk.
• Understanding nutrient-specific associations is crucial for preventative strategies.

Purpose of the Study:

• To investigate the relationship between dietary intake of fat, zinc, and vitamins A and C and the risk of prostate cancer.
• To examine potential differences in dietary patterns between prostate cancer cases and controls within diverse ethnic groups.
• To identify specific nutrients that may independently contribute to prostate cancer development in elderly men.

Main Methods:

• A population-based case-control study involving 452 prostate cancer cases and 899 controls on Oahu, Hawaii.
• Quantitative dietary history interviews were conducted using a standardized method.
• Statistical analyses, including multiple logistic regression, were employed to assess nutrient-specific odds ratios and trends.

Main Results:

• Older men (≥70 years) with higher weekly consumption of saturated fat, carotenes, and zinc had an increased risk of prostate cancer.
• Odds ratios for the highest quartile of intake were elevated for saturated fat (1.7), carotenes (1.6), and zinc (1.7).
• Significant linear trends were observed for saturated fat and zinc, indicating a dose-response relationship.

Conclusions:

• Dietary saturated fat, carotenes, and zinc appear to be independently associated with an increased risk of prostate cancer in elderly men.
• These findings highlight the potential role of specific dietary components in prostate carcinogenesis.
• Further research is warranted to elucidate the mechanisms underlying these associations and inform dietary recommendations.