Dataset Information

Foods, macronutrients and breast cancer risk in postmenopausal women: a large UK cohort.

ABSTRACT:

Background

The role of diet in breast cancer aetiology is unclear; recent studies have suggested associations may differ by estrogen receptor status.

Methods

Baseline diet was assessed in 2000-04 using a validated questionnaire in 691?571 postmenopausal UK women without previous cancer, who had not changed their diet recently. They were followed by record linkage to national cancer and death databases. Cox regression yielded adjusted relative risks for breast cancer for 10 food items and eight macronutrients, subdivided mostly into five categories of baseline intake. Trends in risk across the baseline categories were calculated, assigning re-measured intakes to allow for measurement error and changes in intake over time; P-values allowed for multiple testing.

Results

Women aged 59.9 (standard deviation (SD 4.9)) years at baseline were followed for 12 (SD 3) years; 29 005 were diagnosed with invasive breast cancer. Alcohol intake had the strongest association with breast cancer incidence: relative risk (RR) 1.08 [99% confidence interval (CI) 1.05-1.11] per 10?g/day higher intake, P?=?5.8?×?10-14. There were inverse associations with fruit: RR 0.94 (99% CI 0.92-0.97) per 100?g/day higher intake, P?=?1.1?×?10-6, and dietary fibre: RR 0.91 (99% CI 0.87-0.96) per 5?g/day increase, P?=?1.1?×?10-4. Fruit and fibre intakes were correlated (??=?0.62) and were greater among women who were not overweight, so residual confounding cannot be excluded. There was no heterogeneity for any association by estrogen receptor status.

Conclusions

By far the strongest association was between alcohol intake and an increased risk of breast cancer. Of the other 17 intakes examined, higher intakes of fruit and fibre were associated with lower risks of breast cancer, but it is unclear whether or not these associations are causal.

SUBMITTER: Key TJ

PROVIDER: S-EPMC6469308 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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Publications

Foods, macronutrients and breast cancer risk in postmenopausal women: a large UK cohort.

Key Timothy J TJ Balkwill Angela A Bradbury Kathryn E KE Reeves Gillian K GK Kuan Ai Seon AS Simpson Rachel F RF Green Jane J Beral Valerie V

International journal of epidemiology 20190401 2

<h4>Background</h4>The role of diet in breast cancer aetiology is unclear; recent studies have suggested associations may differ by estrogen receptor status.<h4>Methods</h4>Baseline diet was assessed in 2000-04 using a validated questionnaire in 691 571 postmenopausal UK women without previous cancer, who had not changed their diet recently. They were followed by record linkage to national cancer and death databases. Cox regression yielded adjusted relative risks for breast cancer for 10 food it ...[more]

PMID: 30412247

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Dataset Information

Foods, macronutrients and breast cancer risk in postmenopausal women: a large UK cohort.

Background

Methods

Results

Conclusions

Publications

Foods, macronutrients and breast cancer risk in postmenopausal women: a large UK cohort.

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