Dietary vitamin D and calcium intake and premenopausal breast cancer risk in a German case-control study

被引:54
作者
Abbas, Sascha [1 ]
Linseisen, Jakob [1 ]
Chang-Claude, Jenny [1 ]
机构
[1] German Canc Res Ctr, Div Canc Epidemiol, D-69120 Heidelberg, Germany
来源
NUTRITION AND CANCER-AN INTERNATIONAL JOURNAL | 2007年 / 59卷 / 01期
关键词
D O I
10.1080/01635580701390223
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Epidemiological studies and laboratory data suggest that vitamin D may protect against the development of cancer, including breast cancer. Vitamin D supply affects the bioavailability of dietary calcium, which might also have anticarcinogenic effects. However, few studies considered them jointly. We used a population-based case-control study in Germany to examine the independent and joint effects of dietary vitamin D and calcium on premenopausal breast cancer risk. Dietary information was assessed using a validated food frequency questionnaire from 2 78 premenopausal cases and 666 age-matched controls. Odds ratios (ORs) and 95% confidence intervals (Cls) were estimated using multivariate models adjusting vitamin D models for calcium intake and vice versa. Breast cancer risk was significantly inversely associated with vitamin D intake. The OR and 95% CI for the highest intake category (>= 5 mu g/day) was 0.50 (95% CI = 0.26-0.96) compared with the lowest (< 2 mu g/day; P-trend = 0.02). Dietary calcium intake was not associated with breast cancer (OR = 0.73, 95% CI = 0.41-1.29) for the highest (>= 1,300 mg/day) versus the lowest category (< 700 mg/day), P-trend = 0.29). No statistically significant interaction between the 2 nutrients was observed. Our data support a protective effect of dietary vitamin D on premenopausal breast cancer risk independent of dietary calcium intake.
引用
收藏
页码:54 / 61
页数:8
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