期刊
CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION
卷 30, 期 2, 页码 335-343出版社
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/1055-9965.EPI-20-0764
关键词
-
资金
- NIH [U01 CA176726, UM1 CA186107, P01 CA087969, R01 CA050385]
- American Institute for Cancer Research (AICR)
- Susan G. Komen (SGK)
The study found that higher dietary glycemic load after a breast cancer diagnosis was associated with increased risk of breast cancer-specific and all-cause mortality. Additionally, higher dietary glycemic index, glycemic load, insulin index, and insulin load after a breast cancer diagnosis were also associated with higher risk of death from any cause.
Background: We investigated the associations of postdiagnostic dietary glycemic index (GI), glycemic load (GL), insulin index (II), and insulin load (IL) with breast cancer-specific and all-cause mortality. Methods: Among 8,932 women with stage I-III breast cancer identified in the Nurses' Health Study (NHS; 1980-2010) and NHSII (1991-2011), we prospectively evaluated the associations between postdiagnostic GI, GL, II, and IL, and breast cancer-specific and all-cause mortality. Participants completed a validated food frequency questionnaire every 4 years after diagnosis. Results: During follow-up by 2014 in the NHS and 2015 in the NHSII, 2,523 deaths, induding 1,071 from breast cancer, were documented. Higher postdiagnostic GL was associated with higher risk of both breast cancer-specific mortality [HRQ5vsQ1 = 1.33; 95% confidence interval (CI) - 1.09-1.63; P-trend = 0.008) and all-cause mortality (HRQ5vsQ1 = 1.26; 95% CI = 1.10-1.45; P-trend = 0.0006). Higher all-cause mortality was also observed with higher postdiagnostic GI (HRQ5vsQ1 = 1.23; 95% CI = 1.08-1.40; P-trend = 0.001), II (HRQ5vsQ1 = 1.20; 95% CI = 1.04-1.38; P-trend = 0.005), and IL (HRQ5vsQ1 = 1.23; 95% CI = 1.07-1.42; P-trend = 0.0003). The associations were not modified by insulin receptor or estrogen receptor status of the tumor, or body mass index. Conclusions: We found that higher dietary GL, reflecting postprandial glucose response, after a breast cancer diagnosis was associated with higher risk of breast cancer-specific mortality. Higher dietary GI, GL, II, and IL after a breast cancer diagnosis were associated with higher risk of death from any cause. Impact These results suggest that carbohydrate quantity and quality may be important in breast cancer prognosis.
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